any more data or experience on these? currently running the greddy/ngk racing plug in 10 heat range. they fouled out pretty quickly on a daily driven car.
im using stock fc coils with a hks twin strike on haltech e6k

thinking of trying these out but cat afford to be a test dummy ha

 

If you're fouling plugs those plugs, the ignition has issues or the tune is crap. A different plug in a like heat range isn't your answer.

 

Might be from my mid to high 12 afr idle with no iac

 

^That's a very nice AFR for idle. I typically tune to whatever the engine is "happiest." It's a joy when it's in the 12's. Check your logs for "min AFR" and you might find there's step-in issues or WOT issues. Using the averages can cause plugs like this. I wouldn't blame the plugs, something else is to blame IMO.

 

From my understanding, a spark plug must maintain a certain temp to help keep itself clean. Those race plugs are designed to dissipate heat, resulting is fouled plugs. You can lean the afr to help but running a nickle plated plugs such as the NGK V-power, will maintain a higher plug temp and prevent/help fouling.

 

I wasnt really blaming the plugs. Just thinking of replacing them and was wondering about the autolites.

 

i think you are past the rough tune stage, but if you are starting a tune from scratch, its much cheaper to ruin a set or two of autolights @$3 a plug, than anything else.