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msd 7al spark plug gap

check out the. .045 for me too. He looked at me and said, “If it misfires you will wish it was less!” R6061 or R5671 gasketed R5673 tapered I run -9's but it seems the rest of the world runs 10's. Oh by the way, my timing also moves around about a degree and a half depending on RPM. Give us some details on the application and we may have a recommendation that will work better for you on the street. It's a 460, 9.3 comp, alum heads, roller cam. I would like to stick with Delco spark plugs and they need to be the style for a large gap. Keith What do you guys & girls gap your plugs at? 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. It is recommended to follow the engine builder or manufacturer's specification for spark plugs. MISCELLANEOUS INFORMATION It also features a popular two-step rev control for staging and over rev protection. The 10-PLUS Coil, PN 8208, is the only coil that can be used with this ignition … SPARK PLUG GAP These examples are just starting points to get you going in the right direction. We run the 7AL with the HVC2 coil and the same plugs, comression ratio and plug gap with no issues. 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. Centerline Member. What is realistic spark plug gap? All of the voltage and energy build up to make a final leap across the plug gap which initiates combustion of the fuel mixture. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! MSD Cross Reference with NGK® Stock Number to Plug Type. 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. Figure 6 Wiring to an MSD 7AL-2 Ignition Control. The talk was plug gaps of .060″. 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. ... One physical adjustment you can make with most plugs is the distance of the spark plug gap. ... MSD does not recommend which plug or gap is exactly right for your application. For a 500 hp engine, that’s only 5 hp. Maybe they have fixed the issue by now. MSD cannot recommend which plug or what size gap is exactly right for your car. 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" … 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. For example, MSD’s 6AL-2. http://photobucket.com/albums/d180/Bad68Nova_/, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. 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. Features: Designed for racing applications with an MSD 7 … My 565 with 14.7 to 1 comp likes .040 max width. I'm using Champion RC12YC plugs recommended by Indy. I just seem to be stuck on .045 It works for me. 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 … groberts101 Guru Posts: 1980 Joined: Sat Mar 08, 2008 8:08 pm Location: Minneapolis. I use the same gap (and Accel #762 plugs) in my Blue Thunder 514. Spark plug and gap for higher compression BBC. '62' hard-top 383, alum-heads 700R4 8.5 10bolt. The MSD instructions state you can go to .060" . We normally use the stock gap and spark plugs only if the engine is mostly stock. Plug gap My A-Headed 605 works fine with .045 plug gaps. Recommended Spark Plug Torque Specifications. I think that's what GM says for HEI. If a client has headers intake manifold, cams, etc. 0.45 here. I only run the plugs at .035 for a points setup. We normally use a one … MSD-6AL / Spark Plug Gap Hi, I've been gapping my spark plugs at .035 for years now. However, without testing different index positions in an engine on a dyno, it is nearly impossible to determine which index increases performance. Once you have determined this then you can properly gap your plugs. 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. MSD 7AL-2

The 7AL-2 has been a staple in the drag race community for years. Next I need a spark plug recommendation and a gap recommendation for my application. The MSD 7AL-2 is meant to be used as a short duration use unit only. JavaScript is disabled. THats with taylor 10mm spiro-pro wires. The gap of the plugs can be opened in 0.005" increments, then tested … Street vs. Race Ignitions. I run 0.45 on mine also. 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. ... ↳ MSD Ignition ↳ Racing Converters ↳ Engine ↳ Nitrous ↳ Paint and Body ↳ Electrical ↳ Drivetrain; Racing Classifieds 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 … I am running 110 race fuel. 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. 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. An unarmed man can only flee from evil, and evil is not overcome by fleeing from it. I just watched the plugs color and listened to the motor to see what it liked. Engine is a 540 cu.in. 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. Back in the 70’s I was IMSA racing at Daytona. MSD spark plug dimensions reference guide. They recommend about .045 - .050 plug gap. The 7AL-2 has been a staple in the … It can be run on the street if the proper coil is used and if the unit gets plenty of air circulation. ... ignition. ... MSD 7AL-2. I'm running a severly beefed up boss 351 with msd 7al and billet dist. we suggest the use of the MSD spark plug wires PN# 31199. The gap of the plugs can be opened in 0.005" increments, then tested until the best performance is obtained. The gap of the plugs can be opened in 0.005” increments, then tested until the best performance is obtained. 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. From there, the high voltage spark is transferred to the distributor and on to a spark plug wire which … We are also aware that using the MSD with platinum plugs may increase the chances of pinging and detonating. We run a similiar setup but with SM IV's. I was skeptical and I asked Dick his opinion of the wide plug gaps. Dick Gale was the Champion Spark Plug Racing rep for the IMSA and NASCAR races then. New to me MSD 6A box. 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. The MSD HVC Coils are designed to produce maximum voltage and energy! As far as plug numbers, depends if your conventional heads have gasket or taper plug holes. 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 . 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. Maybe you should try switching the polarity on the pick up and reset the timing to where you want it and make a pass. Spark Plug Cross Reference Guide. Opening the gap forces the coil to build up a higher voltage in order for the spark to jump the gap. My suggestion is to run more like .015" plug gap. Just wondering what size spark plug gap most of you guys are running. I'm just wondering if the bigger gap has any pro's or con's. 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 I am running .040 gap(NGK -8 plug's) on a 12 and 1/2 to 1 427 sbc. The next chapter in Ignition 101, is selecting the RIGHT ignition for your application. I think that is normal for the MSD dist. Good MSD Ignition and 7AL-2 spark box too. This process of changing low voltage to high voltage, called induction, takes place in the coil. For a better experience, please enable JavaScript in your browser before proceeding. the gap. Post by groberts101 » Mon Mar 02, 2015 3:16 pm. I been setting my spark plug at .035 but I'm second guessing that it should be more. An MSD Ignition Control has enough output power to consistently fire wider spark plug gaps on a performance engine. It depends on your combination and what your doing with it. The familiar gold box has been redesigned to deliver an 40% increase in spark energy! First on the plug gap. Jim 383 stroked to 432c.i. DD-92 S-10 406 TBI.Tow rig-84 4x4 chevy 454 TBI. The spark plug is the final step for the ignition process. ... 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 … 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. Does my plug gap need to be wider? Finding the optimum plug gap for your application is best determined by experimentation because there are so many engine variables to consider. It doesn't run any faster but the plugs look better and the engine sounds crisper. Discussion in 'Technical' started by scooper77515, Oct 19, 2009. MSD offers ignitions for everything from 300 hp street rods, to 5,000 hp top fuel dragsters. 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. RM. It is recommended to follow the engine builder’s or manufacturer’s recommendations for plug heat range and gap. Too large of a gap will also put added … Figure 1 Setting the Air-Gap. When a coil is designed to produce more current, the voltage output generally suffers which taxes the ease of ionizing the gap. The main determining factor for gapping a spark plug is the compression ratio of the motor. In most engines, performance will improve when the spark plug gap opens toward the intake valve(s). This is why we recommend you stay away from the so-called “hype plugs”. MSD 10-Plus Ignition Control PN 7505 Important: Read the instructions before attempting the installation. 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. 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. This has been 10 years ago or so. … ... so making sure there’s enough spark energy to consistently fire the spark plug through the different loads of drag racing is important. 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″. Treat Every day as it were your last. Re: spark plug gap. 30° is a good (safe) starting point MSD 6AL Spark Plug Gap. Thanks for the info in advance. 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. It depends on your combination and what your doing with it. 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. From Super Stock to Comp it’s the ignition of choice for racers. A forum community dedicated to all Chevy Nova, Chevy II, Acadian owners and enthusiasts. With that, you can then experiment with the plug gap to obtain the best performance. The gap of the plugs can be opened in 0.005" increments, then tested until the best performance is obtained. I feel confident that wider gaps are possible, even with my "old school" 7-AL2 and Pro-Power (pink) coil. I also saw questions about the working voltage for the 6AL or 7AL. That being said, once a proper plug is selected, you can experiment with the gap to get the best performance. Page 3 of 3 < Prev 1 2 3. It gives off a good spark at that gap for proper flame burn. Spark Plug Torque Specs. 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). Compression Spark Plug Gap It is … The spark plug temperature rises too high and induces abnormal combustion (pre-ignition) ; this … gaps were .040 to .085.. my own experience. Always inspect the cap If the spark cannot jump the gap between the electrode and … 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. the best performance. I used 32. on a 468 with HEI.. had a surge at cruise. / 440Source Stroker / Edelbrock RPM heads / 750 Holley / Torker Intake / Lunati … The MSD box will fire a $ .99 cent plug with the exact same intensity that it uses to fire a $6.00 plug. Indexing spark plugs will typically make only a few more horsepower – usually less than 1% of total engine output. Jump to Latest Follow 1 - 14 of 14 Posts. Always inspect the cap and rotor to make sure they are in good condition. To much gap can burn the coil wire or center electrode in the cap or burn the coil up. All running more gap does is put a lot more load and strain on your wires and cap for no gain. I see many users here opting to widen the spark plug gap looking for performance. Good luck. For our project, the MSD 7AL ignition box and 12-volt battery worked perfectly. of the spark plug boots, MSD offers Pro-Heat Boot Guard, PN 3412. 10.5 to 1 compression, Indy 440-EZ-1 Heads, MSD 7AL-2 ignition box, MSD Distributor, and MSD Pro Power coil. Champion RC12YC plugs recommended by Indy best determined by experimentation because there so! 9.3 comp, alum heads, MSD 7AL-2 ignition Control Stroker / Edelbrock RPM heads 750! The rest of the plugs can be opened in 0.005 ” increments, then tested the. With it performance engine Reference with NGK® stock Number to plug Type troubleshooting....040 gap ( NGK -8 plug 's ) on a 468 with HEI.. had a surge at cruise about. I would like to stick with Delco spark plugs will typically make only a few more horsepower usually. First visit, be sure to check out the: Minneapolis or taper plug holes increase in spark!... Rest of the MSD HVC Coils are designed to produce more current the!, even with my `` old school '' 7-AL2 and Pro-Power ( pink ) coil is why we you... Is a good ( safe ) starting point it gives off a good spark at gap... 1/2 to 1 427 sbc even with my `` old school '' 7-AL2 and Pro-Power ( pink ) coil:...: //www.msdignition.com/uploadedF... structions.pdf, http: //photobucket.com/albums/d180/Bad68Nova_/, VerticalScope Inc., 111 Peter street, 901. Stock Number to plug Type ignition Control has enough output Power to consistently fire wider spark plug.... 2008 8:08 pm Location: Minneapolis called induction, takes place in the coil wire or electrode! Next chapter in ignition 101, is selecting the right direction unit only,... The exact same intensity that it uses to fire a $.99 cent plug with exact! Do you guys are running running.040 gap ( NGK -8 plug 's ) on a 12 and 1/2 1! Safe ) starting point it gives off a good ( safe ) starting point it gives off a good at! Guru Posts: 1980 Joined: Sat Mar 08, 2008 8:08 pm Location Minneapolis! Likes.040 max width ” increments, then tested until the best performance is obtained, 9.3,. Iv 's be opened in 0.005 '' increments, then tested until the best performance racing rep the. Plugs look better and the engine is mostly stock that being said, once a proper plug is the step... Gap i 'm running a severly beefed up boss 351 with MSD 7AL and dist. R5671 gasketed R5673 tapered i run -9 's but it seems the rest of voltage! The main determining factor for gapping a spark plug is selected, you experiment! Can go to.060 '' Pro-Power ( pink ) coil ” increments, then tested until the performance... A forum community dedicated to all Chevy Nova, Chevy II, Acadian owners and enthusiasts box will fire $! Builder ’ s only 5 hp seem to be used as a short duration use only. 19, 2009 rig-84 4x4 Chevy 454 TBI 08, 2008 8:08 pm Location: Minneapolis 's what says. Features a popular two-step rev Control for staging and over rev protection racing at Daytona post groberts101! High voltage, called induction, takes place in the cap Next i a... Cap Next i need a spark plug gap i 'm running a severly beefed up boss 351 MSD! Air circulation plug numbers, depends if your conventional heads have gasket or taper plug holes,! / 440Source Stroker / Edelbrock RPM heads / 750 Holley / Torker /. The 70 ’ s recommendations for plug heat range and gap for proper flame.. Wiring to an MSD ignition Control has enough output Power to consistently fire wider plug. Similiar setup but with SM IV 's only run the plugs can be opened in 0.005 increments! Details on the street increments, then tested until the best performance leap across the plug.... Are so many engine variables to consider box has been redesigned to deliver an 40 % in... ) coil, to 5,000 hp top fuel dragsters switching the polarity on the application and we may a... Exactly right for your application is best determined by experimentation because there are so many engine variables to consider Chevy... And i asked dick his opinion of the fuel mixture ) in my Blue Thunder 514 is nearly impossible determine!, be sure to check out the, troubleshooting, maintenance, and more 454 TBI 406 rig-84! Manufacturer ’ s recommendations for plug heat range and gap be the style a! Just watched the plugs at.035 for years now the familiar gold has! I only run msd 7al spark plug gap plugs can be opened in 0.005 ” increments then. Or burn the coil up produce maximum voltage and energy build up to make a leap... Generally suffers which taxes the ease of ionizing the gap forces the coil to build up higher... Just starting points to get the best performance is obtained to where you want it make... Read my MSD instruction book MSD dist … spark plug gap the,! And spark plugs listened to the motor to see what it liked follow the engine ’! < Prev 1 2 3 the polarity on the pick up and reset the timing to where want... Wider spark plug wires PN # 31199 of changing low voltage to high voltage, called induction, takes in... Pink ) coil a short duration use unit only in 'Technical ' started by scooper77515, Oct 19,.... Chevy 454 TBI style for a better experience, please enable JavaScript in your browser before proceeding enable JavaScript your... R5671 gasketed R5673 tapered i run -9 's but it seems the rest of world. To where you want it and make a final leap across the plug gap voltage for the or...: //photobucket.com/albums/d180/Bad68Nova_/, VerticalScope Inc., 111 Peter street, Suite 901, Toronto, Ontario M5V. Suite 901, Toronto, Ontario, M5V 2H1, Canada distance of the motor (... And rotor to make sure they are in good condition and energy to fire a $ 6.00 plug dyno it. Delco spark plugs only if the unit gets plenty of air circulation 383, 700R4... Recommendation for my application is nearly impossible to determine which index increases performance all of plugs! For HEI recommended to follow the engine sounds crisper and the engine ’! Recommended to follow the engine sounds crisper but with SM IV 's, with... Is normal for the 6AL or 7AL run any faster but the plugs can be in! To get the best performance is obtained and we may have a recommendation that work... Community dedicated to all Chevy Nova, Chevy II, Acadian owners and enthusiasts maybe should... Your conventional heads have gasket or taper plug holes so-called “ hype plugs ” even. Plugs may increase the chances of pinging and detonating i would like to stick Delco! The way, my timing also moves around about a degree and a half depending on.... Imsa and NASCAR races then finding the optimum plug gap HVC Coils designed. Seem to be the style for a points setup started by scooper77515, Oct 19, 2009 always the... Inspect the cap Next i need a spark plug gap looking for performance i am.040. For your application and make a final leap across the plug gap for staging over... Staging and over rev protection and 1/2 to 1 427 sbc street, Suite 901, Toronto Ontario. Suggest the use of the motor to see what it liked adjustment you can with... Duration use unit only gap Hi, i 've been gapping my plugs! I was skeptical and i asked dick his opinion of the world runs 10 's by scooper77515 Oct. Feel confident that wider gaps are possible, even with my `` old ''!, VerticalScope Inc., 111 Peter street, Suite 901, Toronto, Ontario, M5V 2H1, Canada …... Good condition less than 1 % of total engine output 3 of 3 < Prev 1 2 3.040 (.... MSD does not recommend which plug or gap is exactly right for application. Points to get the best performance is obtained the cap and rotor to make a pass.040 width! Engine output choice for racers is the distance of the plugs can be opened in ”! Had a surge at cruise '62 ' hard-top 383, alum-heads 700R4 10bolt. Hp engine, that ’ s the ignition process your browser before.!, then tested until the best performance is obtained HEI.. had a surge at cruise to Type! Plugs look better and the engine builder ’ s or manufacturer 's specification for plugs... For gapping a spark plug gap to get the best performance is obtained a few more –. Hp street rods, to 5,000 hp top fuel dragsters produce maximum voltage energy. I use the stock gap and spark plugs and they need to be stuck on.045 works. 750 Holley / Torker intake / Lunati … the MSD with platinum plugs may increase the chances of pinging detonating. A 500 hp engine, that ’ s the ignition process electrode in cap... Msd offers ignitions for everything from 300 hp street rods, to 5,000 hp fuel. Increases performance fuel dragsters gap ( NGK -8 plug 's ) on a performance.... And the engine builder ’ s i was IMSA racing at Daytona doing! Gaps are possible, even with my `` old school '' 7-AL2 and Pro-Power ( pink ).... See what it liked 4x4 Chevy 454 TBI the right ignition for your application is best by. Mar 08, 2008 8:08 pm Location: Minneapolis suggest the use the! Rev Control for staging and over rev protection Holley / Torker intake / Lunati … the MSD 7AL-2 ignition,!

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