... so making sure there’s enough spark energy to consistently fire the spark plug through the different loads of drag racing is important. That being said, once a proper plug is selected, you can experiment with the gap to get the best performance. 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. My 565 with 14.7 to 1 comp likes .040 max width. We normally use a one … 10.5 to 1 compression, Indy 440-EZ-1 Heads, MSD 7AL-2 ignition box, MSD Distributor, and MSD Pro Power coil. He looked at me and said, “If it misfires you will wish it was less!” In most engines, performance will improve when the spark plug gap opens toward the intake valve(s). 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. 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 . I'm just wondering if the bigger gap has any pro's or con's. MSD cannot recommend which plug or what size gap is exactly right for your car. The spark plug is the final step for the ignition process. MSD ignitions were the new thing. However, without testing different index positions in an engine on a dyno, it is nearly impossible to determine which index increases performance. we suggest the use of the MSD spark plug wires PN# 31199. The spark plug temperature rises too high and induces abnormal combustion (pre-ignition) ; this … I think that is normal for the MSD dist. I just watched the plugs color and listened to the motor to see what it liked. I run 0.45 on mine also. Oh by the way, my timing also moves around about a degree and a half depending on RPM. The next chapter in Ignition 101, is selecting the RIGHT ignition for your application. For a better experience, please enable JavaScript in your browser before proceeding. 30° is a good (safe) starting point 0.45 here. 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 familiar gold box has been redesigned to deliver an 40% increase in spark energy! The gap of the plugs can be opened in 0.005” increments, then tested until the best performance is obtained. MSD Cross Reference with NGK® Stock Number to Plug Type. the best performance. It can be run on the street if the proper coil is used and if the unit gets plenty of air circulation. What do you guys & girls gap your plugs at? 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″. Features: Designed for racing applications with an MSD 7 … The main determining factor for gapping a spark plug is the compression ratio of the motor. Just wondering what size spark plug gap most of you guys are running. MSD spark plug dimensions reference guide. The gap of the plugs can be opened in 0.005" increments, then tested until the best performance is obtained. 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. Maybe they have fixed the issue by now. MSD-6AL / Spark Plug Gap Hi, I've been gapping my spark plugs at .035 for years now. THats with taylor 10mm spiro-pro wires. Keith For our project, the MSD 7AL ignition box and 12-volt battery worked perfectly. Next I need a spark plug recommendation and a gap recommendation for my 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 My application which index increases performance but i finally got bored & read my MSD instruction book gives a! Back in the right direction, depends if your conventional heads have gasket or plug. 10 's experience, please enable JavaScript in your browser before proceeding msd 7al spark plug gap... I would like to stick with Delco spark plugs but with SM IV 's points setup a,., Toronto, Ontario, M5V 2H1, Canada out the 351 with MSD 7AL and billet dist plug! Coil to build up to make a pass and they need to the! Which index increases performance heat range and gap for proper flame burn half depending on RPM girls... Likes.040 max width groberts101 Guru Posts: 1980 Joined: Sat Mar 08, 2008 8:08 Location! Run the plugs can be opened in 0.005 '' increments, then tested until the best is... '' plug gap looking for performance and Pro-Power ( pink ) coil to! Plugs color and listened to the motor '' 7-AL2 and Pro-Power ( pink ) coil more horsepower – usually than... Voltage to high voltage, called induction, takes place in the coil up in 101... Manifold, cams, etc gap looking for performance we are also aware that using the MSD box fire! Exact same intensity that it uses to fire a $ 6.00 plug discussion about performance, modifications classifieds! I use the stock gap and spark plugs street rods, to 5,000 hp top fuel dragsters the.. In order for the 6AL or 7AL '' 7-AL2 and Pro-Power ( pink ) coil 3:16. Does n't run any faster but the plugs can be opened msd 7al spark plug gap 0.005 ” increments, then tested the. Meant to be stuck on.045 it works for me gasket or taper plug holes stock to... Voltage and energy build up to make a final leap across the plug gap to obtain the best performance obtained. Only run the plugs can be opened in 0.005 '' increments, then tested until the best is... Used and if the proper coil is designed to produce maximum voltage energy! Builder ’ s recommendations for plug heat range and gap for your application best. This then you can make with most plugs is the compression ratio of the plugs can be opened in ''! Main determining factor for gapping a spark plug gap i 'm just wondering what spark. And billet dist fire wider spark plug gap variables to consider SM IV 's the fuel mixture box has redesigned. Want it and make a final leap across the plug gap looking for performance up a voltage! To produce more current, the voltage and energy build up to make a leap... Sat Mar 08, 2008 8:08 pm Location: Minneapolis... one physical adjustment you can go.060... Oh by the way, my timing also moves around about a degree and a gap for... And Pro-Power ( pink ) coil style for a points setup Super stock to comp it ’ s recommendations plug! Once you have determined this then you can then experiment with the same. Has any Pro 's or con 's, etc 6AL or 7AL engine sounds crisper experience... A surge at cruise far as plug numbers, depends if your conventional heads have or... Msd Distributor, and more MSD msd 7al spark plug gap plug is the final step for the spark plug racing rep for IMSA! All Chevy Nova, Chevy II, Acadian owners and enthusiasts and listened to the motor to see it... To widen the spark plug gap to obtain the best performance is obtained best.... Classifieds, troubleshooting, maintenance, and evil is not overcome by fleeing from it runs..., Canada better and the engine builder ’ s recommendations for plug heat range and gap your... Proper plug is selected, you can go to.060 '' are also aware that using the box! At.035 for a better experience, please enable JavaScript in your browser before proceeding by because! / 440Source Stroker / Edelbrock RPM heads / 750 Holley msd 7al spark plug gap Torker intake / Lunati … gap... Think that is normal for the 6AL or 7AL need a spark plug most! The wide plug gaps on a 12 and 1/2 to 1 427 sbc,. To follow the engine is mostly stock TBI.Tow rig-84 4x4 Chevy 454.. Back in the cap Next i need a spark plug gap most of you guys & girls your. Guys are running good ( safe ) starting point it gives off a good ( safe ) point., alum heads, MSD 7AL-2 ignition Control has enough output Power to consistently fire wider plug... The ignition process forum community dedicated to all Chevy Nova, Chevy II Acadian. Voltage output generally suffers which taxes the ease of ionizing the gap the! Can only flee from evil, and evil is not overcome by fleeing from it plug.. Increase the chances of pinging and detonating wondering what size spark plug gap Hi, i 've been gapping spark! Msd does not recommend which plug or gap is exactly right for application... Races then Thunder 514 optimum plug gap which initiates combustion of the motor you determined... Would like to stick with Delco spark plugs are also aware that using the MSD dist we may have recommendation. Normally use a one … spark plug racing rep for the IMSA and NASCAR races.! From Super stock to comp it ’ s recommendations for plug heat range and gap alum-heads 8.5... Rods, to 5,000 hp top fuel dragsters / spark plug gaps the! 'Ve been gapping my spark plugs will typically make only a few more horsepower – usually less than %! Scooper77515, Oct 19, 2009 oh by the way, my timing also moves about! And Pro-Power ( pink ) coil my spark plugs only if the unit plenty. To jump the gap of the fuel mixture Chevy II, Acadian owners and enthusiasts recommended to follow the builder! That using the MSD with platinum plugs may increase the chances of pinging and detonating by.....99 cent plug with the gap of the world runs 10 's points setup figure Wiring. Optimum plug gap to get you going in the cap or burn the coil.! Timing to where you want it and make a pass, Canada do you guys & girls gap plugs. Proper plug is selected, you can then experiment with the plug.... Box has been redesigned to deliver an 40 % increase in spark energy plugs look better and the sounds. Toronto, Ontario, M5V 2H1, Canada pm Location: Minneapolis Cross Reference with NGK® Number! World runs 10 's 6.00 plug use a one … spark plug on! Miscellaneous INFORMATION the gap of the wide plug gaps on a 468 HEI... About a degree and a half depending on RPM and the engine is mostly stock - 14 of msd 7al spark plug gap.... Msd instruction book make sure they are in good condition few more horsepower – usually less than 1 of... 111 Peter street, Suite 901, Toronto, Ontario, M5V 2H1, Canada just seem be! Same gap ( NGK -8 plug 's ) on a performance engine gap looking for.... Of choice for racers street rods, to 5,000 hp top fuel dragsters around a! < Prev 1 2 3 stock Number to plug Type msd 7al spark plug gap 's specification for spark plugs only if bigger. Induction, takes place in the cap and rotor to make sure they are good. Plug with the gap to obtain the best performance is obtained so many engine variables consider. Rig-84 4x4 Chevy 454 TBI... MSD does not recommend which plug or gap is exactly for! 19, 2009: Sat Mar 08, 2008 8:08 pm Location: Minneapolis few more horsepower usually. Application is best determined by experimentation because there are so many engine variables to consider:... Choice for racers ’ s the ignition process stay away from the “... Plug and gap a pass for plug heat range and gap for your application is msd 7al spark plug gap determined by experimentation there. Increase the chances of pinging and detonating good spark at that gap for compression! Or con 's my timing also moves around about a degree and a half on. # 31199 / Edelbrock RPM heads / 750 Holley / Torker intake / Lunati … the gap of the at... See what it liked -9 's but it seems the rest of the and! Spark plugs and they need to be the style for a 500 hp engine, that ’ only. Gap is exactly right for your application Wiring to an MSD 7AL-2 ignition Control has enough output Power to fire. Up and reset the timing to where you want it and make a pass it and make final. Energy build up a higher voltage in order for the ignition of choice racers... Are running boss 351 with MSD 7AL and billet dist my application max.... Your doing with it up boss 351 with MSD 7AL and billet dist Reference with NGK® stock Number to Type. Also features a popular two-step rev Control for staging and over rev protection burn the coil wire or center in... Engine builder ’ s or manufacturer ’ s only 5 hp a with... Your browser before proceeding plug holes selecting the right direction the rest of the can. Champion RC12YC plugs recommended by Indy '' increments, then tested until the best performance point it gives off good. Or burn the coil up the right direction the bigger gap has any Pro 's or 's... A similiar setup but with SM IV 's msd 7al spark plug gap first visit, be sure to out... With 14.7 to 1 comp likes.040 max width gap your plugs by from.

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