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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Pontiac Technician
Category: Pontiac
Satisfied Customers: 2376
Experience:  GM Grand Master Technician 2007. 14 years experience.
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Have a 1989 pontiac firebird 350 with stroker kit what is

Customer Question

have a 1989 pontiac firebird 350 with stroker kit what is best spark plug should i use ?
Submitted: 1 year ago.
Category: Pontiac
Expert:  Gary replied 1 year ago.

Hi there,

Nothing wrong with the brands you have tried.

Although I favour NGK.

Heat range is compression ratio depend.

Can you give some more info about your engine?


Customer: replied 1 year ago.
chevy 350 with stroker kit 383.... tpi..header right now i have shorty accel header plugs
Customer: replied 1 year ago.
sorry LS engine
Expert:  Gary replied 1 year ago.

Ok, you'll be limited if you need the short plugs.

Best to stay with that style to stop your leads burning up.

Depending on compression ratio, cam profile, fuel octane, driving style as to whether one range colder would be necessary.

How hard do you rev the engine, and how often?

Street car only?