ok i got a stroker motor with le2 h/c on 9:8:1 cr. i have stock plugs in there now i was wondering if i should get diffrent ones. and is threre a diffrence in power or is it just better for the motor. just dont know which ones to use???

 

Do to your higher HP level, I would run one heat range colder than stock. Autolite 104 or NGK TR6.

 

what about for a low compression stroker (355 8.2-8.5:1 CR)?

 

A 355 is not a stroker As far as what spark plug, what HP is the engine producing? I'm running 2 heat ranges colder (Autolite 103) with 542 rwhp (blower only).

 

red, why so low on the compression? If boost is in the future as your compression suggests then yeah think about the cooler plugs mentioned, NA you might get away with TR55s or 106s.

Plugs don't make power platinum is about longer plug life through less gap errosion as is iridium, multiple electrodes like some companies sell are a sales gimmick. The plugs we are recommending are dirt cheap as in the more expensive NGKs are still under $2 apiece