i am curious to know what plugs are you high whp guys running I'm looking to be around 600whp here soon and would like to know if the NGK bpr8es's will still run my car smooth and they did when it was more stock. thanks a lot for the help guys

 

I'm only at about 500 whp but I run the ngk BR8ES and they work great. They are about a 1/2 step colder then the bpr8es because there not the protruding tip. I'm sure your tuner can recommend the correct plug to run at your power level.

 

BR8ES has worked fine for me at 600whp on mustang, and for people making hundreds more HP.

as far as run smooth like stock, I can't really say- 2.4L, no balance shaft, stiff mounts, less sound deadening, S3's.... not really stock-like in any ways these days

 

I run stock plugs
606whp 505wtq (mustang)

 

Evo 9 - IKH24

 

I ran the 7's 1 step colder, 850awhp range, 650ish pump gas.

 

I run NGK br8es gapped to .020". HTA86/e85/35+psi. Gotta remember that if you are gonna run ethanol it is like dropping one heat range on the plugs. NGK coppers are fantastic, and DIRT cheap so keeping a dozen on hand is financially easy to stomach too.

 

evo 9. I think I'm running stockers. If not the only logical step up which is the Denso IKH24's. I'm over 650HP verified on a mustang dyno.

 

I thought the 8's were colder than 7's ?

 

In NGK's spark plug line-up the 8's are colder than the 7's. I can't speak for every spark plug manufacturer.

I run BPR7ES gaped to .026" using E-85. 36psi, 700hp.

 

I found out the hard way from Ted B that when using E-85 a hotter plug is highly recommended. If you're using E-85 I'm convinced now that the BPR7ES are the way to go.

 

BR8ES here. Gapped at .024 on e85 running 44 psi making 756 on STMs mustang dyno..

 

IKH24's
gapped .016.

 

Thanks Guys