msd 7al spark plug gap

It depends on your combination and what your doing with it. For a 500 hp engine, that’s only 5 hp. ... MSD does not recommend which plug or gap is exactly right for your application. Opening the gap forces the coil to build up a higher voltage in order for the spark to jump the gap. MSD-6AL / Spark Plug Gap Hi, I've been gapping my spark plugs at .035 for years now. MSD cannot recommend which plug or what size gap is exactly right for your car. They recommend about .045 - .050 plug gap. 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. I only run the plugs at .035 for a points setup. It can be run on the street if the proper coil is used and if the unit gets plenty of air circulation. We are also aware that using the MSD with platinum plugs may increase the chances of pinging and detonating. The gap of the plugs can be opened in 0.005" increments, then tested until the best performance is obtained. He looked at me and said, “If it misfires you will wish it was less!” 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. I think that is normal for the MSD dist. An MSD Ignition Control has enough output power to consistently fire wider spark plug gaps on a performance engine. I been setting my spark plug at .035 but I'm second guessing that it should be more. I'm just wondering if the bigger gap has any pro's or con's. The MSD box will fire a $ .99 cent plug with the exact same intensity that it uses to fire a $6.00 plug. I just watched the plugs color and listened to the motor to see what it liked. Finding the optimum plug gap for your application is best determined by experimentation because there are so many engine variables to consider. Figure 1 Setting the Air-Gap. MSD spark plug dimensions reference guide. Plug gap My A-Headed 605 works fine with .045 plug gaps. 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. Give us some details on the application and we may have a recommendation that will work better for you on the street. JavaScript is disabled. I think that's what GM says for HEI. My suggestion is to run more like .015" plug gap. I'm using Champion RC12YC plugs recommended by Indy. Keith To much gap can burn the coil wire or center electrode in the cap or burn the coil up. 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. 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. the gap. 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. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! ... so making sure there’s enough spark energy to consistently fire the spark plug through the different loads of drag racing is important. The MSD 7AL-2 is meant to be used as a short duration use unit only. I also saw questions about the working voltage for the 6AL or 7AL. ... MSD 7AL-2. 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″. gaps were .040 to .085.. my own experience. In most engines, performance will improve when the spark plug gap opens toward the intake valve(s). Thanks for the info in advance. we suggest the use of the MSD spark plug wires PN# 31199. 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 used 32. on a 468 with HEI.. had a surge at cruise. As far as plug numbers, depends if your conventional heads have gasket or taper plug holes. It is recommended to follow the engine builder’s or manufacturer’s recommendations for plug heat range and gap. Street vs. Race Ignitions. It also features a popular two-step rev control for staging and over rev protection. This has been 10 years ago or so. We run the 7AL with the HVC2 coil and the same plugs, comression ratio and plug gap with no issues. Engine is a 540 cu.in. 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. Top. It is recommended to follow the engine builder or manufacturer's specification for spark plugs. ... One physical adjustment you can make with most plugs is the distance of the spark plug gap. Jump to Latest Follow 1 - 14 of 14 Posts. ... ignition. … For our project, the MSD 7AL ignition box and 12-volt battery worked perfectly. MSD 7AL-2

The 7AL-2 has been a staple in the drag race community for years. DD-92 S-10 406 TBI.Tow rig-84 4x4 chevy 454 TBI. 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 familiar gold box has been redesigned to deliver an 40% increase in spark energy! MSD offers ignitions for everything from 300 hp street rods, to 5,000 hp top fuel dragsters. 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. 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

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