Hi all,
I'm running about 450BHP on a 96 STI fully forged CDB FMIC etc. It runs on VPower with 20% Meth,I'm still using NGK PFR 7B plugs. Should I use a different plug now or are these OK at that level?
Thanks, Richard.

 

There fine

 

Hi Richard

We are running 490bhp and we are still on 7b

8's many people using at high power builds

Jura

 

Jura, what are 7b 8s, mine just say PFR7B on the plug?
Thanks

 

He means 7b which is short for the plugs your using, the 8's are just the next rating for even higher power engines, but as mentioned the 7b's/pfr7b your using are spot on

 

OK thanks guys I'll stick with the 7Bs then.

 

8 is a colder plug.

Use it if you get det problems. But be aware it can cause carbon fouling which in itself can cause det (when the carbon glows red under hard use).

So; if it ain't broke; don't fix.

 

I wouldn't recommend 8's, had to remove them from my classic in the end as they never ran right ... put 7's in after that which were fine.

TX.