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12-05-2011, 07:54 PM
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#1 |
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Registered User
Join Date: Dec 2008
Location: Pleak, Texas
Posts: 420
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Spark plugs
Hey everybody. I want to change the plugs in my '67 but would like some opinions first. Right now, I'm running copper ACDelco R43TS plugs. My engine is set at 12* BTDC. The compression ratio is somewhere between 9-9.5:1. The engine is a 350 originally out of an '84 Chevy van. It's all stock with the exception of headers, Thumpr cam, flat-top pistons w/2 valve reliefs, and aftermarket heads. It runs great, but seems to miss sometimes and usually diesels when I shut it off. I read that I might need to go down 1-2 heat ranges. Anybody know for sure? What would be the best type of plug to use? ACDelco coppers again? Recommended gap? Thanks.
__________________
-1967 Chevrolet Fleetside LWB- 350 V8 w/thumpr cam, NV3500, 3.08 gears, A/C, PS  -1983 Chevy Silverado C1500- 383 stroker, TH400 -1989 Chevy Silverado K1500 SWB- 5.3L swap, 700R4, 3.42 gears -And a '66 Ford Mustang- 200 I6, C4 trans, rust bucket "The only thing we have to fear is fear itself." -FDR (and maybe rust too)  You've gotta be able to stop and steer before you can go fast! |
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