I've been running 3924's but I was told these are colder than "stock"?
I have AFR aluminum heads, should I run 3923's with 100-125 shot of nitrous?
Will N/A performance suffer with them?
What is part # for stock heat range, 3926?
aluminum head can benefit from a bit cooler plug, hence why Afr and the others recommend the 3923. I'd stick with them, may close up the gap a bit for use with the spray
I have yet to do my homework on plugs for my new heads. I know that I'm going with autolites. Not sure on the heat range yet. Op go 1-2 ranges colder than the stock recommendation if you're running the spray. I ran 2 heat ranges colder on the e7's with a 150 shot. I didn't notice any side effects when running n/a.