i have a 1993 Z28 with a newly rebuilt 383 Stroker. should i use stock spark plugs go colder or go hotter?
im not sure what info will help i have stock heads ported polished and gasket matched with bowl blending, gasket matched intake, 32 LB injectors long tube headers 11.5:1 compression
any help is appreciated
Thanks

 

I'd go one step colder. For NA: NGK TR6 or Autolite AR103.
Stay away from platinum plugs for any performance use.

 

yea start with tr6 plugs read them if you can go warmer to tr5 do it.......start too cold and you just waste $25 fouling plugs start to hot and you can detonate and waste a motor....

 

I'm running autolite 104's with my setup. I never had good luck with any NGK plug.

 

Thanks for the help !!

 

I have a 93 z28 with N20, I've been running NGK tr6 and never had a problem. I got all my friends running them to and no problems.