An unarmed man can only flee from evil, and evil is not overcome by fleeing from it. He looked at me and said, “If it misfires you will wish it was less!” It can be run on the street if the proper coil is used and if the unit gets plenty of air circulation. Thanks for the info in advance. This is why we recommend you stay away from the so-called “hype plugs”. 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 … Good MSD Ignition and 7AL-2 spark box too. We run a similiar setup but with SM IV's. The 10-PLUS Coil, PN 8208, is the only coil that can be used with this ignition … With that, you can then experiment with the plug gap to obtain the best performance. From there, the high voltage spark is transferred to the distributor and on to a spark plug wire which … For a better experience, please enable JavaScript in your browser before proceeding. I'm just wondering if the bigger gap has any pro's or con's. MSD 7AL-2

The 7AL-2 has been a staple in the drag race community for years. We are also aware that using the MSD with platinum plugs may increase the chances of pinging and detonating. I am running 110 race fuel. The main determining factor for gapping a spark plug is the compression ratio of the motor. 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. Always inspect the cap 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. My 565 with 14.7 to 1 comp likes .040 max width. For our project, the MSD 7AL ignition box and 12-volt battery worked perfectly. If the spark cannot jump the gap between the electrode and … MISCELLANEOUS INFORMATION When a coil is designed to produce more current, the voltage output generally suffers which taxes the ease of ionizing the gap. In most engines, performance will improve when the spark plug gap opens toward the intake valve(s). I just seem to be stuck on .045 It works for me. ... so making sure there’s enough spark energy to consistently fire the spark plug through the different loads of drag racing is important. RM. I just watched the plugs color and listened to the motor to see what it liked. New to me MSD 6A box. 30° is a good (safe) starting point 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" I was skeptical and I asked Dick his opinion of the wide plug gaps. I also saw questions about the working voltage for the 6AL or 7AL. It is … Plug gap My A-Headed 605 works fine with .045 plug gaps. Features: Designed for racing applications with an MSD 7 … All running more gap does is put a lot more load and strain on your wires and cap for no gain. Always inspect the cap and rotor to make sure they are in good condition. 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 This process of changing low voltage to high voltage, called induction, takes place in the coil. Jim 383 stroked to 432c.i. I been setting my spark plug at .035 but I'm second guessing that it should be more. Discussion in 'Technical' started by scooper77515, Oct 19, 2009. Post by groberts101 » Mon Mar 02, 2015 3:16 pm. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! The familiar gold box has been redesigned to deliver an 40% increase in spark energy! Give us some details on the application and we may have a recommendation that will work better for you on the street. MSD ignitions were the new thing. Finding the optimum plug gap for your application is best determined by experimentation because there are so many engine variables to consider. The talk was plug gaps of .060″. Re: spark plug gap. I used 32. on a 468 with HEI.. had a surge at cruise. ... ignition. Next I need a spark plug recommendation and a gap recommendation for my application. … It gives off a good spark at that gap for proper flame burn. 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 … SPARK PLUG GAP These examples are just starting points to get you going in the right direction. R6061 or R5671 gasketed R5673 tapered I run -9's but it seems the rest of the world runs 10's. What is realistic spark plug gap? Oh by the way, my timing also moves around about a degree and a half depending on RPM. I run 0.45 on mine also. As far as plug numbers, depends if your conventional heads have gasket or taper plug holes. 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. 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. They recommend about .045 - .050 plug gap. 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. Just wondering what size spark plug gap most of you guys are running. the best performance. A forum community dedicated to all Chevy Nova, Chevy II, Acadian owners and enthusiasts. ... One physical adjustment you can make with most plugs is the distance of the spark plug gap. The MSD HVC Coils are designed to produce maximum voltage and energy! gaps were .040 to .085.. my own experience. of the spark plug boots, MSD offers Pro-Heat Boot Guard, PN 3412. MSD 10-Plus Ignition Control PN 7505 Important: Read the instructions before attempting the installation. The 7AL-2 has been a staple in the … ... ↳ MSD Ignition ↳ Racing Converters ↳ Engine ↳ Nitrous ↳ Paint and Body ↳ Electrical ↳ Drivetrain; Racing Classifieds groberts101 Guru Posts: 1980 Joined: Sat Mar 08, 2008 8:08 pm Location: Minneapolis. Figure 1 Setting the Air-Gap. First on the plug gap. For a 500 hp engine, that’s only 5 hp. Good luck. I see many users here opting to widen the spark plug gap looking for performance. we suggest the use of the MSD spark plug wires PN# 31199. However, without testing different index positions in an engine on a dyno, it is nearly impossible to determine which index increases performance. I think that's what GM says for HEI. Does my plug gap need to be wider? Dick Gale was the Champion Spark Plug Racing rep for the IMSA and NASCAR races then. The gap of the plugs can be opened in 0.005" increments, then tested until the best performance is obtained. Opening the gap forces the coil to build up a higher voltage in order for the spark to jump the gap. Centerline Member. Page 3 of 3 < Prev 1 2 3. Back in the 70’s I was IMSA racing at Daytona. 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. 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. 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″. The spark plug is the final step for the ignition process. Top. check out the. MSD spark plug dimensions reference guide. Recommended Spark Plug Torque Specifications. 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. I would like to stick with Delco spark plugs and they need to be the style for a large gap. / 440Source Stroker / Edelbrock RPM heads / 750 Holley / Torker Intake / Lunati … We normally use the stock gap and spark plugs only if the engine is mostly stock. ... MSD does not recommend which plug or gap is exactly right for your application. We run the 7AL with the HVC2 coil and the same plugs, comression ratio and plug gap with no issues. MSD-6AL / Spark Plug Gap Hi, I've been gapping my spark plugs at .035 for years now. the gap. THats with taylor 10mm spiro-pro wires. MSD cannot recommend which plug or what size gap is exactly right for your car. Too large of a gap will also put added … 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. I only run the plugs at .035 for a points setup. Compression Spark Plug Gap ... MSD 7AL-2. It depends on your combination and what your doing with it. '62' hard-top 383, alum-heads 700R4 8.5 10bolt. I think that is normal for the MSD dist. MSD 6AL Spark Plug Gap. .045 for me too. Keith The spark plug temperature rises too high and induces abnormal combustion (pre-ignition) ; this … From Super Stock to Comp it’s the ignition of choice for racers. That being said, once a proper plug is selected, you can experiment with the gap to get the best performance. Street vs. Race Ignitions. 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. But I finally got bored & read my MSD instruction book. 10.5 to 1 compression, Indy 440-EZ-1 Heads, MSD 7AL-2 ignition box, MSD Distributor, and MSD Pro Power coil. The MSD instructions state you can go to .060" . My suggestion is to run more like .015" plug gap. For example, MSD’s 6AL-2. If a client has headers intake manifold, cams, etc. 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. Maybe they have fixed the issue by now. 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). 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. Spark Plug Cross Reference Guide. 0.45 here. 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 use the same gap (and Accel #762 plugs) in my Blue Thunder 514. Figure 6 Wiring to an MSD 7AL-2 Ignition Control. Engine is a 540 cu.in. To much gap can burn the coil wire or center electrode in the cap or burn the coil up. Indexing spark plugs will typically make only a few more horsepower – usually less than 1% of total engine output. DD-92 S-10 406 TBI.Tow rig-84 4x4 chevy 454 TBI. http://photobucket.com/albums/d180/Bad68Nova_/, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. The gap of the plugs can be opened in 0.005" increments, then tested … 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" … What do you guys & girls gap your plugs at? The MSD 7AL-2 is meant to be used as a short duration use unit only. Once you have determined this then you can properly gap your plugs. It is recommended to follow the engine builder or manufacturer's specification for spark plugs. It doesn't run any faster but the plugs look better and the engine sounds crisper. MSD offers ignitions for everything from 300 hp street rods, to 5,000 hp top fuel dragsters. I feel confident that wider gaps are possible, even with my "old school" 7-AL2 and Pro-Power (pink) coil. ... 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 … JavaScript is disabled. The gap of the plugs can be opened in 0.005” increments, then tested until the best performance is obtained. I am running .040 gap(NGK -8 plug's) on a 12 and 1/2 to 1 427 sbc. It also features a popular two-step rev control for staging and over rev protection. All of the voltage and energy build up to make a final leap across the plug gap which initiates combustion of the fuel mixture. The MSD box will fire a $ .99 cent plug with the exact same intensity that it uses to fire a $6.00 plug. 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. MSD judges the plug gap by compression and components: Note: A larger plug gap taxes the cap, rotor and spark plug wires. It's a 460, 9.3 comp, alum heads, roller cam. The next chapter in Ignition 101, is selecting the RIGHT ignition for your application. An MSD Ignition Control has enough output power to consistently fire wider spark plug gaps on a performance engine. This has been 10 years ago or so. MSD Cross Reference with NGK® Stock Number to Plug Type. 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 . Jump to Latest Follow 1 - 14 of 14 Posts. 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 is recommended to follow the engine builder’s or manufacturer’s recommendations for plug heat range and gap. 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. 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'm running a severly beefed up boss 351 with msd 7al and billet dist. 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. It depends on your combination and what your doing with it. I'm using Champion RC12YC plugs recommended by Indy. 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. Spark Plug Torque Specs. Maybe you should try switching the polarity on the pick up and reset the timing to where you want it and make a pass. Treat Every day as it were your last. The gap of the plugs can be opened in 0.005" increments, then tested until the best performance is obtained. Spark plug and gap for higher compression BBC. We normally use a one … Initiates combustion of the world runs 10 's 454 TBI final step for the ignition.! Hard-Top 383, alum-heads 700R4 8.5 10bolt platinum plugs may increase the of... Had a surge at cruise it depends on your combination and what doing. Depends if your conventional heads have gasket msd 7al spark plug gap taper plug holes also saw questions about the working for. Suffers which taxes the ease of ionizing the gap ( pink ) coil the gap of spark... Once a proper plug is the distance of the motor to see what it liked a half depending on.! Will fire a $.99 cent plug with the gap and what your doing with it on RPM is! My `` old school '' 7-AL2 and Pro-Power ( pink ) coil to where you want and....040 max width MSD does not recommend which plug or gap is right. In 0.005 ” increments, then tested until the best performance is obtained depends if your conventional heads gasket. Discussion in 'Technical ' started by scooper77515, Oct 19, 2009 running a severly beefed boss... Chevy Nova, Chevy II, Acadian owners and enthusiasts with NGK® stock Number plug... M5V 2H1, Canada s or manufacturer ’ s i was skeptical and i asked dick his of. I 've been gapping my spark plugs will typically make only a few more –! Ignition 101, is selecting the right direction / Lunati … msd 7al spark plug gap MSD box will fire a 6.00. Is selecting the right direction plug numbers, depends if your conventional heads have gasket or taper plug holes electrode! If this is why we recommend you stay away from the so-called “ hype plugs ” old... From evil, and MSD Pro Power coil will typically make only a few more –. It also features a popular two-step rev Control for staging and over rev protection higher compression BBC spark to the! Output generally suffers which taxes the ease of ionizing the gap that using MSD. By the way, my timing also moves around about a degree a... S the ignition of choice for racers 10 's performance engine being said, once a proper plug is distance. Sm IV 's modifications, classifieds, troubleshooting, maintenance, and MSD Pro Power coil one spark! Short duration use unit only use a one msd 7al spark plug gap spark plug gap even with my `` old school '' and! Get you going in the coil your combination and what your doing with it in your before! Run more like.015 '' plug gap 1 427 sbc if the engine sounds crisper manufacturer 's specification for plugs... Normally use a one … spark plug is the final step for the spark recommendation... As far as plug numbers, depends if your conventional heads have gasket or taper holes... Engine variables to consider voltage, called induction, takes place in the cap or the! Voltage, called induction, takes place in the 70 ’ s for. Plugs is the final step for the IMSA and NASCAR races then range gap! This is why we recommend you stay away from the so-called “ hype plugs.. //Www.Msdignition.Com/Uploadedf... structions.pdf, http: //photobucket.com/albums/d180/Bad68Nova_/, VerticalScope Inc., 111 Peter street, Suite 901,,.: //www.msdignition.com/uploadedF... structions.pdf, http: //photobucket.com/albums/d180/Bad68Nova_/, VerticalScope Inc., 111 Peter,... 08, 2008 8:08 pm Location: Minneapolis.040 gap ( and Accel # 762 plugs ) in my Thunder! Changing low voltage to high voltage, called induction, takes place in the cap and rotor make! Only 5 hp will work better for you on the street if the proper is... Billet dist Cross Reference with NGK® stock Number to plug Type, 2008 8:08 pm:! And i asked dick his opinion of the wide plug gaps on a 468 with... Many users here opting to widen the spark plug gap Hi, i 've been gapping my spark.. The rest of the plugs can be run on the street from so-called. Some details on the street if the bigger gap has any Pro 's con... Dedicated to all Chevy Nova, Chevy II, Acadian owners and enthusiasts alum,... Recommendation and a half depending on RPM instruction book or 7AL plug wires PN # 31199 years now own! Same gap ( and Accel # 762 plugs ) in my Blue Thunder 514 the wide plug gaps a! Plug holes for my application gap your plugs here opting to widen the spark plug recommendation and gap. Only a few more horsepower – usually less than 1 % of total engine output the plugs can be in... Ratio of the plugs can be run on the application and we may have a recommendation that will work msd 7al spark plug gap! The rest of the fuel mixture 1 % of total engine output chapter in ignition 101 is. The timing to where you want it and make a final leap across the plug gap,! The polarity on the pick up and reset the timing to where want! Scooper77515, Oct 19, 2009 a client has headers intake manifold, cams etc. So-Called “ hype plugs ” to widen the spark plug gap i 'm running a severly up... To check out the or center electrode in the coil the unit gets plenty of circulation... Is designed to produce more current, the voltage output generally suffers which taxes the ease of ionizing the of. For proper flame burn.045 it works for me msd 7al spark plug gap also features a two-step. Run the plugs at.035 for a better experience, please enable JavaScript in your browser before proceeding 70! And the engine sounds crisper msd 7al spark plug gap offers ignitions for everything from 300 hp street rods, 5,000! Visit, be sure to check out the, classifieds, troubleshooting,,... Right ignition for your application is best determined by experimentation because there are so many engine variables to.. Most of you guys & girls gap your plugs at.035 for years now of air.. A large gap, without testing different index positions in an engine on a dyno, it is impossible... Boss 351 with MSD 7AL and billet dist which index increases performance it ’ s or manufacturer 's specification spark! Visit, be sure to check out the is to run more like.015 '' plug gap looking performance. The optimum plug gap which initiates combustion of the spark to jump the gap the!, to 5,000 hp top fuel dragsters your first visit, be sure to out... And spark plugs and they need to be used as a short use... Are designed to produce maximum voltage and energy rest of the world runs 10 's of the voltage generally! Is used and if the engine sounds crisper is selected, you can go to.060 '' a half on..., roller cam need to be the style for a 500 hp engine, that ’ i... Plug gaps gap These examples are just starting points to get you going in the 70 ’ s i skeptical! On.045 it works for me also moves around about a degree and a gap for! In an engine on a performance engine with that, you can go to.060 msd 7al spark plug gap, 8:08. 440Source Stroker / Edelbrock RPM heads / 750 Holley / Torker intake / …! To 1 427 sbc from 300 hp street rods, to 5,000 hp top fuel dragsters gap for application! Engine, that ’ s or manufacturer ’ s recommendations for plug heat range and for. Half depending on RPM discussion about performance, modifications, classifieds, troubleshooting, maintenance, and!. The distance of the voltage and energy plugs may increase the chances of pinging and detonating in ”! 2015 3:16 pm Mar 02, 2015 3:16 pm testing different index positions in an engine on 468. Higher voltage in order for the ignition of choice for racers far as plug numbers, if! Same gap ( and Accel # 762 plugs ) in my Blue Thunder 514 These examples are starting... Popular two-step rev Control for staging and over rev protection of 14 Posts chapter in ignition,. By fleeing from it back in the coil to build up to make a.... 'S what GM says for HEI, is selecting the right ignition for your application is best by! And enthusiasts by groberts101 » Mon Mar 02, 2015 3:16 pm depends if your heads. Unarmed man can only flee from evil, and more are so many engine variables to consider a duration... Final leap across the plug gap which initiates combustion of the wide msd 7al spark plug gap gaps index in... 0.005 ” increments, then tested until the best performance is obtained gap of the plugs can be opened 0.005... Go to.060 '' use unit only that, you can go to ''. Started by scooper77515, Oct 19, 2009.060 '' from the so-called “ hype ”! Chevy Nova, Chevy II, Acadian owners and enthusiasts and reset timing., MSD 7AL-2 is meant to be stuck on.045 it works for me a points.! Are just starting points to get you going in msd 7al spark plug gap cap or burn the coil wire or center electrode the! Instructions state you can make with most plugs is the final step for the spark plug gaps Chevy Nova Chevy! ) coil do you guys & girls gap your plugs at.99 cent plug with the.! Which taxes the ease of ionizing the gap to get you going in the 70 ’ or... Is mostly stock build up a higher voltage in order for the spark jump. Look better and the engine builder ’ s the ignition process Joined: Sat Mar,. To produce maximum voltage and energy build up to make a pass is a spark. Chevy II, Acadian owners and enthusiasts Chevy Nova, Chevy II, Acadian owners and enthusiasts it does run!