What spark plugs for 3.2 ss?
 

I am in the process of rebuilding the engine in my 78 sc. I'm not sure what spark plugs to run. I have a new set of the ones recommended for a stock 78. Will I have to run different plugs with 9.5 to 1 compression, 98mm p/c and, a 964 cam or will the regular plugs work ok? I don't know if it will make a difference but I live in CA and am limited to crappy 91 octane gas.

Thanks

I have a Kremer 3.2 (911 SC case, 98mm Mahle P/C's, 9.8 compression, CIS, SSI's, stock cams). I run exclusively on Shell premium 91 octane.

Kremer recommended Bosch W3CC's, I have been running those for years in the silver version - W3CS - and have been trying one grade hotter - W4CS's - no problems.

I figured that Kremer would recommend dead cold plugs due to the autobahn driving they would normally experience with their engines in Germany....

Dennis

Forgive me for my ignorance. What are the drawbacks running too cold of a plug (fouling?) Is too cold of a plug better than too hot of a plug?

That is a hell of a good question, I am hoping the experts will post their thoughts on this!

I guess a little bit more detail about your motor may be needed.

CIS?

EFI?

CARBS?

EXHAUST?

CHeers

Stock cis with stock exhaust and 964 cam

I ordered the w4cs's today.
Thanks for the advice Dennis