small_block_chev
Nov 5th, 05, 12:19 AM
What is the proper spark plug gap for a GM goodwrench 350 crate motor?
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Cam Nov 5th, 05, 3:24 AM 35 thou.... just like any other production GM engine. small_block_chev Nov 5th, 05, 10:14 PM K Thanks Steves65 Nov 6th, 05, 12:39 PM If you are using a high energy HEI ignition the gap may be as much as 40-45.... (the gap on my plugs is 40 with MSD HEI) Steve Soreback Nov 6th, 05, 12:55 PM Ditto, 40 to 45 if you are using any HEI or aftermarket ignition with a good coil, and magnetic or optical trigger.... JimChevy Nov 7th, 05, 9:11 AM Just curious- what would happen if the gap was opened too far??? Motorhead62 Nov 7th, 05, 12:19 PM FYI, On an HEI w/MSD, the MSD book says to start @ .050 on the plug gap. :D SWHEATON Nov 7th, 05, 12:45 PM SML BLK CHV,if you give us some more info like what type ign your running(HEI vs points),carb,cam,heads,gear etc so we can give you better advice. You could be using anywhere from .035-.060 gap depending on your motor setup & most importantly ign type/setup. Scott | ||