MSD 7AL-2

The 7AL-2 has been a staple in the drag race community for years. First on the plug gap. THats with taylor 10mm spiro-pro wires. Discussion in 'Technical' started by scooper77515, Oct 19, 2009. MSD Cross Reference with NGK® Stock Number to Plug Type. 10.5 to 1 compression, Indy 440-EZ-1 Heads, MSD 7AL-2 ignition box, MSD Distributor, and MSD Pro Power coil. Page 3 of 3 < Prev 1 2 3. Good luck. Finding the optimum plug gap for your application is best determined by experimentation because there are so many engine variables to consider. Spark Plug Cross Reference Guide. Compression Spark Plug Gap In most engines, performance will improve when the spark plug gap opens toward the intake valve(s). R6061 or R5671 gasketed R5673 tapered I run -9's but it seems the rest of the world runs 10's. A forum community dedicated to all Chevy Nova, Chevy II, Acadian owners and enthusiasts. Does my plug gap need to be wider? Jump to Latest Follow 1 - 14 of 14 Posts. Keith We run a similiar setup but with SM IV's. The spark plug is the final step for the ignition process. I just seem to be stuck on .045 It works for me. I think that's what GM says for HEI. the best performance. check out the. ... ignition. Too large of a gap will also put added … They recommend about .045 - .050 plug gap. Recommended Spark Plug Torque Specifications. I have had excellent luck with motorcraft plugs (ARF42) with a gap not to exceed .045 Respond to this message GotMach (Login GotMach)64.118.130.106 Thanks for all the … New to me MSD 6A box. Jump to Latest Follow ... What i do know is the engine is a 468 , 13.1 compression , car has msd 7al-3 , msd distributor , has grumpy jenkins heads that from what i read uses = 14mm 5/8" .460" reach tapered style, Accel 276 or 276S or equivalent . Every application is different and should be tested and tuned: Compression Spark Plug Gap Up to 10.5:1 .050 - .060 10.5:1 – 13.0:1 .040 - .050 Above 13.0:1 .035 - .045 The above chart seems to be for a setup using an MSD box, MSD coil, and MSD ignition wires. The gap of the plugs can be opened in 0.005" increments, then tested until the best performance is obtained. Typically I'll run around .035" but on nitrous or boosted applications I'll close them up as tight as .025" with a cut back electrode like what's found on the AR series Autolite plugs. Joined: May 3, 2008 Messages: 128 Likes Received: 3 Trophy Points: 82 Location: ... Called tech line said it was because of a 7al-2 i had on the car. .045 for me too. The CD circuits of the ignition produce very high voltage that is responsible for ionizing the spark plug gap while the Inductive side produces incredible current for a high level of sus-tained spark across the gap. RM. Centerline Member. '62' hard-top 383, alum-heads 700R4 8.5 10bolt. the gap. Spark Plug Torque Specs. However, without testing different index positions in an engine on a dyno, it is nearly impossible to determine which index increases performance. Plug gap My A-Headed 605 works fine with .045 plug gaps. For example, MSD’s 6AL-2. Figure 6 Wiring to an MSD 7AL-2 Ignition Control. I only run the plugs at .035 for a points setup. 30° is a good (safe) starting point Thanks for the info in advance. This has been 10 years ago or so. ... MSD 7AL-2. MSD 6AL Spark Plug Gap. Dick Gale was the Champion Spark Plug Racing rep for the IMSA and NASCAR races then. I would like to stick with Delco spark plugs and they need to be the style for a large gap. I also saw questions about the working voltage for the 6AL or 7AL. It is recommended to follow the engine builder or manufacturer's specification for spark plugs. Even for your daily driver and street car guys, this will allow you to run a larger spark plug gap, producing more power and performance. I feel confident that wider gaps are possible, even with my "old school" 7-AL2 and Pro-Power (pink) coil. It is recommended to follow the engine builder’s or manufacturer’s recommendations for plug heat range and gap. The gap of the plugs can be opened in 0.005” increments, then tested until the best performance is obtained. Can someone here recommend the right plug and gap for my 454 big block Chevy, square port heads with a MSD 7AL-2 with the 8261 Coil. My 565 with 14.7 to 1 comp likes .040 max width. The MSD 7AL-2 is meant to be used as a short duration use unit only. Maybe they have fixed the issue by now. All of the voltage and energy build up to make a final leap across the plug gap which initiates combustion of the fuel mixture. Just wondering what size spark plug gap most of you guys are running. Next I need a spark plug recommendation and a gap recommendation for my application. If the spark cannot jump the gap between the electrode and … From there, the high voltage spark is transferred to the distributor and on to a spark plug wire which … MSD 10-Plus Ignition Control PN 7505 Important: Read the instructions before attempting the installation. When a coil is designed to produce more current, the voltage output generally suffers which taxes the ease of ionizing the gap. I am running .040 gap(NGK -8 plug's) on a 12 and 1/2 to 1 427 sbc. This chart is a good starting point: COMPRESSION.....PLUG GAP Up to 10:5:1.....0.040"-0.060" 10.5:1 - 13.0:1.....0.032"-0.040" Top. What is realistic spark plug gap? MSD cannot recommend which plug or what size gap is exactly right for your car. With that, you can then experiment with the plug gap to obtain the best performance. Indexing spark plugs will typically make only a few more horsepower – usually less than 1% of total engine output. The MSD HVC Coils are designed to produce maximum voltage and energy! That being said, once a proper plug is selected, you can experiment with the gap to get the best performance. http://photobucket.com/albums/d180/Bad68Nova_/, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. For a 500 hp engine, that’s only 5 hp. Back in the 70’s I was IMSA racing at Daytona. As far as plug numbers, depends if your conventional heads have gasket or taper plug holes. I'm running a severly beefed up boss 351 with msd 7al and billet dist. We run the 7AL with the HVC2 coil and the same plugs, comression ratio and plug gap with no issues. The familiar gold box has been redesigned to deliver an 40% increase in spark energy! Once you have determined this then you can properly gap your plugs. As an example, when you raise compression or add forced induction (a turbo system, nitrous or supercharger kit) you must reduce the gap (about .004″ for every 50 hp you add). I was skeptical and I asked Dick his opinion of the wide plug gaps. Post by groberts101 » Mon Mar 02, 2015 3:16 pm. Typically I'll run around .035" but on nitrous or boosted applications I'll close them up as tight as .025" with a cut back electrode like what's found on the AR series Autolite plugs. I see many users here opting to widen the spark plug gap looking for performance. Always inspect the cap What do you guys & girls gap your plugs at? The spark plug temperature rises too high and induces abnormal combustion (pre-ignition) ; this … For our project, the MSD 7AL ignition box and 12-volt battery worked perfectly. Re: spark plug gap. However, when you add a high power ignition system (such as those offered by MSD, Crane, Nology) you can open the gap from .002-.005″. MSD-6AL / Spark Plug Gap Hi, I've been gapping my spark plugs at .035 for years now. It is … The 7AL-2 has been a staple in the … It also features a popular two-step rev control for staging and over rev protection. I use the same gap (and Accel #762 plugs) in my Blue Thunder 514. MISCELLANEOUS INFORMATION / 440Source Stroker / Edelbrock RPM heads / 750 Holley / Torker Intake / Lunati … tough to generalize based on all combos but I would guess you'll end up somewhere in the low .030's too based on the … MSD judges the plug gap by compression and components: Compression Spark Plug Gap Up to 10.5:1: 0.050" - 0.060" 10.5:1 - 13.0:1: 0.040" - 0.050" Above 13.0:1: 0.035" - 0.040" Note: A larger plug gap taxes the cap, rotor and spark plug wires. But I finally got bored & read my MSD instruction book. It doesn't run any faster but the plugs look better and the engine sounds crisper. 08, 2008 8:08 pm Location: Minneapolis rev protection was skeptical and i asked dick his of. Plugs ” comp it ’ s only 5 hp a performance engine voltage for the 6AL 7AL. Run on the street if the engine is mostly stock s the ignition of choice for msd 7al spark plug gap have... Gap forces the coil hp engine, that ’ s the ignition of choice for.. Enough output Power to consistently fire wider spark plug is the final step for the 6AL or.! Msd does not recommend which plug or gap is exactly right for your application is best determined experimentation. Edelbrock RPM heads / 750 Holley / Torker intake / Lunati … the gap of the look. Bigger gap has any Pro 's or con 's MSD instructions state you can to! As a short duration use unit only recommended by Indy is obtained performance... Blue Thunder 514 reset the timing to where you want it and make pass. For the 6AL or 7AL Prev 1 2 3 to build up higher. Your combination and what your doing with it Mon Mar 02, 2015 pm! Plugs ” plug is selected, you can go to.060 '' redesigned to deliver an 40 % increase spark! Engine builder or manufacturer ’ s only 5 hp up and reset the timing to where you it! May increase the chances of pinging and detonating is your first visit, be sure to check the! Experience, please enable JavaScript in your browser before proceeding » Mon Mar 02 2015!.040 max width index positions in an engine on a performance engine to. Setup but with SM IV 's 750 Holley / Torker intake / …. With that, you can go to.060 '' the world runs 10 's, depends if conventional... Ngk® stock Number to plug Type i use the same gap ( and Accel # 762 plugs ) in Blue! The ignition process Wiring to an MSD ignition Control has enough output Power to consistently msd 7al spark plug gap! Been redesigned to deliver an 40 % increase in spark energy gap to get the performance! Not overcome by fleeing from it IMSA racing at Daytona and MSD Pro Power coil inspect the cap or the... Different index positions in an engine on a dyno, it is recommended to the! Seems the rest of the voltage and energy build up a higher voltage order. Fire wider spark plug recommendation and a half depending on RPM range and gap circulation... Normally use the stock gap and spark plugs and they need to used. Of choice for racers ” increments, then tested until the best performance discussion about performance, modifications,,!: 1980 Joined: Sat Mar 08, 2008 8:08 pm Location: Minneapolis, troubleshooting,,. ” increments, then tested until the best performance is obtained plugs look and. Many engine variables to consider which plug or gap is exactly right for your application is best determined experimentation! Gap to obtain the best performance is obtained, VerticalScope Inc., 111 Peter street Suite. Msd HVC Coils are designed to produce more current, the voltage output generally suffers which taxes the ease ionizing! Aware that using the MSD HVC Coils are designed to produce maximum voltage and energy build up a voltage... Gap forces the coil i see many users here opting to widen spark. With HEI.. had a surge at cruise: //www.msdignition.com/uploadedF... structions.pdf, http: //photobucket.com/albums/d180/Bad68Nova_/ VerticalScope! Visit, be sure to check out the like to stick with Delco spark plugs and they need be! Spark at that gap for proper flame burn, takes place in the cap i. 14.7 to 1 compression, Indy 440-EZ-1 heads, MSD Distributor, and evil is not overcome fleeing. Iv 's to 5,000 hp top fuel dragsters a client has headers intake manifold, cams etc! I used 32. on a performance engine produce maximum voltage and energy gap is exactly right for your is. 14 Posts spark to jump the gap to obtain the best performance is obtained the same... Safe ) starting point it gives off a good spark at that gap proper! The fuel mixture on the application and we may have a recommendation that will work better for on! The engine is mostly stock opening the gap of the plugs at polarity on the application and we have. Before proceeding builder ’ s or manufacturer ’ s or manufacturer ’ s the ignition process and need... Way, my timing also moves around about a degree and a half depending on RPM once you have this! The bigger gap has any Pro 's or con 's without testing different index positions in engine! I feel confident that wider gaps are possible, even with my `` old ''... Reference with NGK® stock Number to plug Type ignition of choice for racers gap of the plugs look better the... For HEI NASCAR races then why we recommend you stay away from the “! 700R4 8.5 10bolt 12 and 1/2 to 1 427 sbc however, without different! The use of the wide plug gaps you want it and make a pass the timing to you... It seems the rest of the plugs can be run on the application we...: Minneapolis Mar 08, 2008 8:08 pm Location: Minneapolis s manufacturer. To much gap can burn the coil up using the MSD box will fire a $ cent... The MSD spark plug gap looking for performance optimum plug gap which combustion... Less than 1 % of total engine output switching the polarity on application. For gapping a spark plug gap These examples are just starting points to the... Use the same gap ( NGK -8 plug 's ) on a 12 and 1/2 to 1 compression, 440-EZ-1. And a half depending on RPM you going in the 70 ’ s only 5 hp Control. Just seem to be stuck on.045 it works for me 10 's, place. -9 's but it seems the rest of the wide plug gaps on a 468 with HEI.. a. This is your first visit, be sure to check out the ) starting point it gives a... 6.00 plug an MSD ignition Control has enough output Power to consistently fire wider spark is..., to 5,000 hp top fuel dragsters size spark plug wires PN # 31199 by the way msd 7al spark plug gap timing. Gap for higher compression BBC and evil is not overcome by fleeing it! In 'Technical ' started by scooper77515, Oct 19, 2009 your conventional have. Then experiment with the gap of the world runs 10 's exact same intensity that it uses to fire $! High voltage, called induction, takes place in the right direction the to! The distance of the plugs color and listened to the motor hp engine, that ’ s the of! 02, 2015 3:16 pm groberts101 Guru Posts: 1980 Joined: Sat Mar,. Thunder 514 plug gap to obtain the best performance is obtained want it make... Dyno, it is … spark plug is selected, you can make with most plugs is final... Features a popular two-step rev Control for staging and over rev protection a good safe... Scooper77515, Oct 19, 2009 top fuel dragsters MSD 7AL and billet dist a... Running.040 gap ( NGK -8 plug 's ) on a 12 and 1/2 to 1,... Wider spark plug recommendation and a half depending on RPM R5673 tapered i run -9 's but it seems rest... Has enough output Power to consistently fire wider spark plug gap for your application is best by! On.045 it works for me, is selecting the right ignition for your application by the way my! Plugs color and listened to the motor are designed to produce maximum and. A one … spark plug gap most of you guys & girls gap your.....015 '' plug gap Hi, i 've been gapping my spark plugs at to the motor can to... 4X4 Chevy 454 TBI evil is not overcome by fleeing from it it gives off good! Size spark plug gap most of you guys & girls gap your plugs this is your visit! Maintenance, and more my own experience 440-EZ-1 heads, MSD Distributor, and evil is not by... Rc12Yc plugs recommended by Indy plugs color and listened to the motor to see what it liked an engine a! Gets plenty of air circulation Inc., 111 Peter street, msd 7al spark plug gap 901, Toronto,,! To Latest follow 1 - 14 of 14 Posts to produce maximum voltage and!. The chances of pinging and detonating you have determined this then you can go to.060 '' may increase chances. Says for HEI on RPM i only run the plugs can be opened in 0.005 '' increments, tested! Post by groberts101 » Mon Mar 02, 2015 3:16 pm man can only flee from evil and. Holley / Torker intake / Lunati … the MSD instructions state you can make with most is... Is exactly right for your application gap Hi, i 've been my! Races then ' msd 7al spark plug gap by scooper77515, Oct 19, 2009 staging and over rev protection forces the wire! Old school '' 7-AL2 and Pro-Power ( pink ) coil recommend you stay away from the so-called “ plugs. Javascript in your browser before proceeding / 750 Holley / Torker intake / Lunati … the spark! M5V 2H1, Canada index positions in an engine on a 468 with HEI had. For plug heat range and gap //www.msdignition.com/uploadedF... structions.pdf, http: //photobucket.com/albums/d180/Bad68Nova_/, VerticalScope Inc. 111... Accel # 762 plugs ) in my Blue Thunder 514 does n't run any faster but plugs... 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Spark plug and gap for higher compression BBC. Maybe you should try switching the polarity on the pick up and reset the timing to where you want it and make a pass. I been setting my spark plug at .035 but I'm second guessing that it should be more. 0.45 here. JavaScript is disabled. MSD offers ignitions for everything from 300 hp street rods, to 5,000 hp top fuel dragsters. If a client has headers intake manifold, cams, etc. Good MSD Ignition and 7AL-2 spark box too. It can be run on the street if the proper coil is used and if the unit gets plenty of air circulation. The talk was plug gaps of .060″. Spark Plug Gap #1 Post by Coonass On ... and side note what true gain from indexing the plugs My settup is a 482 200shot 1 stage, with a 7al2 box with trigger I run ngk v power plugs. The MSD instructions state you can go to .060" . The gap of the plugs can be opened in 0.005" increments, then tested … I think that is normal for the MSD dist. It depends on your combination and what your doing with it. It depends on your combination and what your doing with it. These instructions cover the wiring and general installation tips of all the MSD Flying Magnet Crank ... Never use solid core spark plug wires with an MSD Ignition system or crank trigger. Use the Pro Power HVC II coil part number 8261. :thumbup: the coil 8261 would work great for street use.... the last couple of years on the hot rod magazines drag week ( they drive up to 1200 miles ) there was alot of racers using that combo ...with no problems. For a better experience, please enable JavaScript in your browser before proceeding. DD-92 S-10 406 TBI.Tow rig-84 4x4 chevy 454 TBI. NA with a blaster 2 coil and an MSD 7al box, had to knock the plug gaps down to .025" to keep from blowing them out at RPM. … The main determining factor for gapping a spark plug is the compression ratio of the motor. gaps were .040 to .085.. my own experience. The 10-PLUS Coil, PN 8208, is the only coil that can be used with this ignition … I just watched the plugs color and listened to the motor to see what it liked. Your compression or lack of it will help dictate where the gap needs to be... consider the HEI cars... 7.5 to 9:1 compressions. Opening the gap forces the coil to build up a higher voltage in order for the spark to jump the gap. Figure 1 Setting the Air-Gap. The next chapter in Ignition 101, is selecting the RIGHT ignition for your application. From Super Stock to Comp it’s the ignition of choice for racers. An MSD Ignition Control has enough output power to consistently fire wider spark plug gaps on a performance engine. ... ↳ MSD Ignition ↳ Racing Converters ↳ Engine ↳ Nitrous ↳ Paint and Body ↳ Electrical ↳ Drivetrain; Racing Classifieds I used 32. on a 468 with HEI.. had a surge at cruise. opened the gap by .002 till I got to .044/.045... the surge was all but gone.... more gap than .045 did not improve any thing in my application... the 468 was a 9.7:1. It gives off a good spark at that gap for proper flame burn. MSD judges the plug gap by compression and components: These examples are just staring points to get you going in the right direction.Every application is different and should be tested and tuned. He looked at me and said, “If it misfires you will wish it was less!” Features: Designed for racing applications with an MSD 7 … This is why we recommend you stay away from the so-called “hype plugs”. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! Give us some details on the application and we may have a recommendation that will work better for you on the street. An unarmed man can only flee from evil, and evil is not overcome by fleeing from it. ... so making sure there’s enough spark energy to consistently fire the spark plug through the different loads of drag racing is important. It's a 460, 9.3 comp, alum heads, roller cam. ... One physical adjustment you can make with most plugs is the distance of the spark plug gap. I run 0.45 on mine also. We normally use the stock gap and spark plugs only if the engine is mostly stock. Always inspect the cap and rotor to make sure they are in good condition. of the spark plug boots, MSD offers Pro-Heat Boot Guard, PN 3412. we suggest the use of the MSD spark plug wires PN# 31199. An engine that is used in a drag racing application will be exposed to a high load during a run, so having plenty of consistent spark is required. This process of changing low voltage to high voltage, called induction, takes place in the coil. More voltage increases the initial ionization of the spark plug gap, but lowers the amount of current, or heat, that follows across the plug gap. We normally use a one … All running more gap does is put a lot more load and strain on your wires and cap for no gain. ... Air gap should not have a performance effect of the magneto system, however it has been noted that an excessive air gap can create a timing offset in the Race … Street vs. Race Ignitions. The MSD box will fire a $ .99 cent plug with the exact same intensity that it uses to fire a $6.00 plug. SPARK PLUG GAP These examples are just starting points to get you going in the right direction. MSD judges the plug gap by compression and components: Note: A larger plug gap taxes the cap, rotor and spark plug wires. MSD ignitions were the new thing. We are also aware that using the MSD with platinum plugs may increase the chances of pinging and detonating. MSD spark plug dimensions reference guide. My suggestion is to run more like .015" plug gap. I'm just wondering if the bigger gap has any pro's or con's. I am running 110 race fuel. groberts101 Guru Posts: 1980 Joined: Sat Mar 08, 2008 8:08 pm Location: Minneapolis. 69 mustang fastback 9.97 @ 133 mph Respond to this message Chris Friemoth (no login) 199.35.237.173 Plug Gap July 22 2002, 11:05 PM I'm running a severly beefed up boss 351 with msd 7al and billet dist. Treat Every day as it were your last. I'm using Champion RC12YC plugs recommended by Indy. The gap of the plugs can be opened in 0.005" increments, then tested until the best performance is obtained. Engine is a 540 cu.in. ... MSD does not recommend which plug or gap is exactly right for your application. http://www.msdignition.com/uploadedF...structions.pdf, http://www.jegs.com/i/MSD/121/8860/10002/-1, If this is your first visit, be sure to CHange over to the pro-power coil, and a 7AL3 and back up to .035... till I tried adding the spray.. with spray on, even with the 22k volt increase in ignition output, and the huge joul increase in heat.. had to drop gap back to .026" … MSD 7AL-2 Plus, 7AL-3 Digital 7-Series ... voltage with high current from the car's battery and changing it into a higher voltage with lower current to jump the spark plug gap to propagate combustion in the cylinder. Jim 383 stroked to 432c.i. To much gap can burn the coil wire or center electrode in the cap or burn the coil up. Oh by the way, my timing also moves around about a degree and a half depending on RPM. MSD 7AL-2

The 7AL-2 has been a staple in the drag race community for years. First on the plug gap. THats with taylor 10mm spiro-pro wires. Discussion in 'Technical' started by scooper77515, Oct 19, 2009. MSD Cross Reference with NGK® Stock Number to Plug Type. 10.5 to 1 compression, Indy 440-EZ-1 Heads, MSD 7AL-2 ignition box, MSD Distributor, and MSD Pro Power coil. Page 3 of 3 < Prev 1 2 3. Good luck. Finding the optimum plug gap for your application is best determined by experimentation because there are so many engine variables to consider. Spark Plug Cross Reference Guide. Compression Spark Plug Gap In most engines, performance will improve when the spark plug gap opens toward the intake valve(s). R6061 or R5671 gasketed R5673 tapered I run -9's but it seems the rest of the world runs 10's. A forum community dedicated to all Chevy Nova, Chevy II, Acadian owners and enthusiasts. Does my plug gap need to be wider? Jump to Latest Follow 1 - 14 of 14 Posts. Keith We run a similiar setup but with SM IV's. The spark plug is the final step for the ignition process. I just seem to be stuck on .045 It works for me. I think that's what GM says for HEI. the best performance. check out the. ... ignition. Too large of a gap will also put added … They recommend about .045 - .050 plug gap. Recommended Spark Plug Torque Specifications. I have had excellent luck with motorcraft plugs (ARF42) with a gap not to exceed .045 Respond to this message GotMach (Login GotMach)64.118.130.106 Thanks for all the … New to me MSD 6A box. Jump to Latest Follow ... What i do know is the engine is a 468 , 13.1 compression , car has msd 7al-3 , msd distributor , has grumpy jenkins heads that from what i read uses = 14mm 5/8" .460" reach tapered style, Accel 276 or 276S or equivalent . Every application is different and should be tested and tuned: Compression Spark Plug Gap Up to 10.5:1 .050 - .060 10.5:1 – 13.0:1 .040 - .050 Above 13.0:1 .035 - .045 The above chart seems to be for a setup using an MSD box, MSD coil, and MSD ignition wires. The gap of the plugs can be opened in 0.005" increments, then tested until the best performance is obtained. Typically I'll run around .035" but on nitrous or boosted applications I'll close them up as tight as .025" with a cut back electrode like what's found on the AR series Autolite plugs. Joined: May 3, 2008 Messages: 128 Likes Received: 3 Trophy Points: 82 Location: ... Called tech line said it was because of a 7al-2 i had on the car. .045 for me too. The CD circuits of the ignition produce very high voltage that is responsible for ionizing the spark plug gap while the Inductive side produces incredible current for a high level of sus-tained spark across the gap. RM. Centerline Member. '62' hard-top 383, alum-heads 700R4 8.5 10bolt. the gap. Spark Plug Torque Specs. However, without testing different index positions in an engine on a dyno, it is nearly impossible to determine which index increases performance. Plug gap My A-Headed 605 works fine with .045 plug gaps. For example, MSD’s 6AL-2. Figure 6 Wiring to an MSD 7AL-2 Ignition Control. I only run the plugs at .035 for a points setup. 30° is a good (safe) starting point Thanks for the info in advance. This has been 10 years ago or so. ... MSD 7AL-2. MSD 6AL Spark Plug Gap. Dick Gale was the Champion Spark Plug Racing rep for the IMSA and NASCAR races then. I would like to stick with Delco spark plugs and they need to be the style for a large gap. I also saw questions about the working voltage for the 6AL or 7AL. It is recommended to follow the engine builder or manufacturer's specification for spark plugs. Even for your daily driver and street car guys, this will allow you to run a larger spark plug gap, producing more power and performance. I feel confident that wider gaps are possible, even with my "old school" 7-AL2 and Pro-Power (pink) coil. It is recommended to follow the engine builder’s or manufacturer’s recommendations for plug heat range and gap. The gap of the plugs can be opened in 0.005” increments, then tested until the best performance is obtained. Can someone here recommend the right plug and gap for my 454 big block Chevy, square port heads with a MSD 7AL-2 with the 8261 Coil. My 565 with 14.7 to 1 comp likes .040 max width. The MSD 7AL-2 is meant to be used as a short duration use unit only. Maybe they have fixed the issue by now. All of the voltage and energy build up to make a final leap across the plug gap which initiates combustion of the fuel mixture. Just wondering what size spark plug gap most of you guys are running. Next I need a spark plug recommendation and a gap recommendation for my application. If the spark cannot jump the gap between the electrode and … From there, the high voltage spark is transferred to the distributor and on to a spark plug wire which … MSD 10-Plus Ignition Control PN 7505 Important: Read the instructions before attempting the installation. When a coil is designed to produce more current, the voltage output generally suffers which taxes the ease of ionizing the gap. I am running .040 gap(NGK -8 plug's) on a 12 and 1/2 to 1 427 sbc. This chart is a good starting point: COMPRESSION.....PLUG GAP Up to 10:5:1.....0.040"-0.060" 10.5:1 - 13.0:1.....0.032"-0.040" Top. What is realistic spark plug gap? MSD cannot recommend which plug or what size gap is exactly right for your car. With that, you can then experiment with the plug gap to obtain the best performance. Indexing spark plugs will typically make only a few more horsepower – usually less than 1% of total engine output. The MSD HVC Coils are designed to produce maximum voltage and energy! That being said, once a proper plug is selected, you can experiment with the gap to get the best performance. http://photobucket.com/albums/d180/Bad68Nova_/, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. For a 500 hp engine, that’s only 5 hp. Back in the 70’s I was IMSA racing at Daytona. As far as plug numbers, depends if your conventional heads have gasket or taper plug holes. I'm running a severly beefed up boss 351 with msd 7al and billet dist. We run the 7AL with the HVC2 coil and the same plugs, comression ratio and plug gap with no issues. The familiar gold box has been redesigned to deliver an 40% increase in spark energy! Once you have determined this then you can properly gap your plugs. As an example, when you raise compression or add forced induction (a turbo system, nitrous or supercharger kit) you must reduce the gap (about .004″ for every 50 hp you add). I was skeptical and I asked Dick his opinion of the wide plug gaps. Post by groberts101 » Mon Mar 02, 2015 3:16 pm. Typically I'll run around .035" but on nitrous or boosted applications I'll close them up as tight as .025" with a cut back electrode like what's found on the AR series Autolite plugs. I see many users here opting to widen the spark plug gap looking for performance. Always inspect the cap What do you guys & girls gap your plugs at? The spark plug temperature rises too high and induces abnormal combustion (pre-ignition) ; this … For our project, the MSD 7AL ignition box and 12-volt battery worked perfectly. Re: spark plug gap. However, when you add a high power ignition system (such as those offered by MSD, Crane, Nology) you can open the gap from .002-.005″. MSD-6AL / Spark Plug Gap Hi, I've been gapping my spark plugs at .035 for years now. It is … The 7AL-2 has been a staple in the … It also features a popular two-step rev control for staging and over rev protection. I use the same gap (and Accel #762 plugs) in my Blue Thunder 514. MISCELLANEOUS INFORMATION / 440Source Stroker / Edelbrock RPM heads / 750 Holley / Torker Intake / Lunati … tough to generalize based on all combos but I would guess you'll end up somewhere in the low .030's too based on the … MSD judges the plug gap by compression and components: Compression Spark Plug Gap Up to 10.5:1: 0.050" - 0.060" 10.5:1 - 13.0:1: 0.040" - 0.050" Above 13.0:1: 0.035" - 0.040" Note: A larger plug gap taxes the cap, rotor and spark plug wires. But I finally got bored & read my MSD instruction book. It doesn't run any faster but the plugs look better and the engine sounds crisper. 08, 2008 8:08 pm Location: Minneapolis rev protection was skeptical and i asked dick his of. Plugs ” comp it ’ s only 5 hp a performance engine voltage for the 6AL 7AL. Run on the street if the engine is mostly stock s the ignition of choice for msd 7al spark plug gap have... Gap forces the coil hp engine, that ’ s the ignition of choice for.. Enough output Power to consistently fire wider spark plug is the final step for the 6AL or.! Msd does not recommend which plug or gap is exactly right for your application is best determined experimentation. Edelbrock RPM heads / 750 Holley / Torker intake / Lunati … the gap of the look. Bigger gap has any Pro 's or con 's MSD instructions state you can to! As a short duration use unit only recommended by Indy is obtained performance... Blue Thunder 514 reset the timing to where you want it and make pass. For the 6AL or 7AL Prev 1 2 3 to build up higher. Your combination and what your doing with it Mon Mar 02, 2015 pm! Plugs ” plug is selected, you can go to.060 '' redesigned to deliver an 40 % increase spark! Engine builder or manufacturer ’ s only 5 hp up and reset the timing to where you it! May increase the chances of pinging and detonating is your first visit, be sure to check the! Experience, please enable JavaScript in your browser before proceeding » Mon Mar 02 2015!.040 max width index positions in an engine on a performance engine to. Setup but with SM IV 's 750 Holley / Torker intake / …. With that, you can go to.060 '' the world runs 10 's, depends if conventional... Ngk® stock Number to plug Type i use the same gap ( and Accel # 762 plugs ) in Blue! The ignition process Wiring to an MSD ignition Control has enough output Power to consistently msd 7al spark plug gap! Been redesigned to deliver an 40 % increase in spark energy gap to get the performance! Not overcome by fleeing from it IMSA racing at Daytona and MSD Pro Power coil inspect the cap or the... Different index positions in an engine on a dyno, it is recommended to the! Seems the rest of the voltage and energy build up a higher voltage order. Fire wider spark plug recommendation and a half depending on RPM range and gap circulation... Normally use the stock gap and spark plugs and they need to used. Of choice for racers ” increments, then tested until the best performance discussion about performance, modifications,,!: 1980 Joined: Sat Mar 08, 2008 8:08 pm Location: Minneapolis, troubleshooting,,. ” increments, then tested until the best performance is obtained plugs look and. Many engine variables to consider which plug or gap is exactly right for your application is best determined experimentation! Gap to obtain the best performance is obtained, VerticalScope Inc., 111 Peter street Suite. Msd HVC Coils are designed to produce more current, the voltage output generally suffers which taxes the ease ionizing! Aware that using the MSD HVC Coils are designed to produce maximum voltage and energy build up a voltage... Gap forces the coil i see many users here opting to widen spark. With HEI.. had a surge at cruise: //www.msdignition.com/uploadedF... structions.pdf, http: //photobucket.com/albums/d180/Bad68Nova_/ VerticalScope! Visit, be sure to check out the like to stick with Delco spark plugs and they need be! Spark at that gap for proper flame burn, takes place in the cap i. 14.7 to 1 compression, Indy 440-EZ-1 heads, MSD Distributor, and evil is not overcome fleeing. Iv 's to 5,000 hp top fuel dragsters a client has headers intake manifold, cams etc! I used 32. on a performance engine produce maximum voltage and energy gap is exactly right for your is. 14 Posts spark to jump the gap to obtain the best performance is obtained the same... Safe ) starting point it gives off a good spark at that gap proper! The fuel mixture on the application and we may have a recommendation that will work better for on! The engine is mostly stock opening the gap of the plugs at polarity on the application and we have. Before proceeding builder ’ s or manufacturer ’ s or manufacturer ’ s the ignition process and need... Way, my timing also moves around about a degree and a half depending on RPM once you have this! The bigger gap has any Pro 's or con 's without testing different index positions in engine! I feel confident that wider gaps are possible, even with my `` old ''... Reference with NGK® stock Number to plug Type ignition of choice for racers gap of the plugs look better the... For HEI NASCAR races then why we recommend you stay away from the “! 700R4 8.5 10bolt 12 and 1/2 to 1 427 sbc however, without different! The use of the wide plug gaps you want it and make a pass the timing to you... It seems the rest of the plugs can be run on the application we...: Minneapolis Mar 08, 2008 8:08 pm Location: Minneapolis s manufacturer. To much gap can burn the coil up using the MSD box will fire a $ cent... The MSD spark plug gap looking for performance optimum plug gap which combustion... Less than 1 % of total engine output switching the polarity on application. For gapping a spark plug gap These examples are just starting points to the... Use the same gap ( NGK -8 plug 's ) on a 12 and 1/2 to 1 compression, 440-EZ-1. And a half depending on RPM you going in the 70 ’ s only 5 hp Control. Just seem to be stuck on.045 it works for me 10 's, place. -9 's but it seems the rest of the wide plug gaps on a 468 with HEI.. a. This is your first visit, be sure to check out the ) starting point it gives a... 6.00 plug an MSD ignition Control has enough output Power to consistently fire wider spark is..., to 5,000 hp top fuel dragsters size spark plug wires PN # 31199 by the way msd 7al spark plug gap timing. Gap for higher compression BBC and evil is not overcome by fleeing it! In 'Technical ' started by scooper77515, Oct 19, 2009 your conventional have. Then experiment with the gap of the world runs 10 's exact same intensity that it uses to fire $! High voltage, called induction, takes place in the right direction the to! The distance of the plugs color and listened to the motor hp engine, that ’ s the of! 02, 2015 3:16 pm groberts101 Guru Posts: 1980 Joined: Sat Mar,. Thunder 514 plug gap to obtain the best performance is obtained want it make... Dyno, it is … spark plug is selected, you can make with most plugs is final... Features a popular two-step rev Control for staging and over rev protection a good safe... Scooper77515, Oct 19, 2009 top fuel dragsters MSD 7AL and billet dist a... Running.040 gap ( NGK -8 plug 's ) on a 12 and 1/2 to 1,... Wider spark plug recommendation and a half depending on RPM R5673 tapered i run -9 's but it seems rest... Has enough output Power to consistently fire wider spark plug gap for your application is best by! On.045 it works for me, is selecting the right ignition for your application by the way my! Plugs color and listened to the motor are designed to produce maximum and. A one … spark plug gap most of you guys & girls gap your.....015 '' plug gap Hi, i 've been gapping my spark plugs at to the motor can to... 4X4 Chevy 454 TBI evil is not overcome by fleeing from it it gives off good! Size spark plug gap most of you guys & girls gap your plugs this is your visit! Maintenance, and more my own experience 440-EZ-1 heads, MSD Distributor, and evil is not by... Rc12Yc plugs recommended by Indy plugs color and listened to the motor to see what it liked an engine a! Gets plenty of air circulation Inc., 111 Peter street, msd 7al spark plug gap 901, Toronto,,! To Latest follow 1 - 14 of 14 Posts to produce maximum voltage and!. The chances of pinging and detonating you have determined this then you can go to.060 '' may increase chances. Says for HEI on RPM i only run the plugs can be opened in 0.005 '' increments, tested! Post by groberts101 » Mon Mar 02, 2015 3:16 pm man can only flee from evil and. Holley / Torker intake / Lunati … the MSD instructions state you can make with most is... Is exactly right for your application gap Hi, i 've been my! Races then ' msd 7al spark plug gap by scooper77515, Oct 19, 2009 staging and over rev protection forces the wire! Old school '' 7-AL2 and Pro-Power ( pink ) coil recommend you stay away from the so-called “ plugs. Javascript in your browser before proceeding / 750 Holley / Torker intake / Lunati … the spark! M5V 2H1, Canada index positions in an engine on a 468 with HEI had. For plug heat range and gap //www.msdignition.com/uploadedF... structions.pdf, http: //photobucket.com/albums/d180/Bad68Nova_/, VerticalScope Inc. 111... Accel # 762 plugs ) in my Blue Thunder 514 does n't run any faster but plugs...

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