Well i have had great success with BKR7E plugs on my old setup, and plan to run them on my new setup at low boost, however i had planned on buying some BKR8E plugs for high boost (22psi) with my 60-1. Unfortunatly i dont think they even make this plug, i cant find it. What plugs are you guys with 20+psi 450+hp cars running? Thanks

 

local shops here run 30psi and stock heat range plugs gapped at .22

 

anyone else???

 

I recommend these:

NGK IX iridium 2668 BKR8EIX .030" $7.60

 

Do you run them? about how much hp do you make? Thanks

 

best numbers I have got to date are 429hp 293tq with those plugs. (b18b)

If thats not good enough Matt Scranton dynoed 1147hp on those same plugs

 

cool thanks. I will give them a try when i decide to raise the boost up. I noticed a lot of turbo cars run those plugs... I just wasnt sure how iridium was with boost and nitrous, but from what info i found they are ok with nitrous...

 

I also runs the number 7 heat range on my tt supra

 

I run 9s for 22 psi/ 500 whp. I have had mis-fires with 8s at around 470 ish, switched to 9s and cleaned right up to way past 500.