What plugs and why?

[4CEFED6]

Stage 2 with stage 2 heads,what plug is the best
(brand,heat range,and gap)Bosch has a bad A**
Platnuim 4 ground.Why cant we use these?
Thanks,Keith

 

[N2BUICK]

Keith

It has has been a long know issue,that platinum plugs just do not work in a turbo application. I not sure the exact reason,but I have never heard of anyone having good luck with these plugs.
I use Autolite AR472 plugs,in my stageII headed motor.I have not made enough runs to dial in the proper heat range, and gap.
This plug style should get you in the ball park.

Austin