moosestang

Wouldn't a colder plug than necessary cause more carbon build up? It's likely that your engine will still ping with the HTO's and you'll get less performance. What I did was run my 91 tune with 93 octane and added 2 degrees of timing. I could never get the 93 tune from brenspeed to work right. Even after he adjusted it, it would still cause pinging.

I wish I new how much timing was in the 93 tune. I've had zero pinging after the whipple install, even in the dead of summer, weird.

zkiller

That's nice but the fact is if your plugs are too cold you build up excess carbon and will foul the plugs. I am glad your dad says it is okay and has 20 years of expoerience with rods.
I have 31 years of experience as a drag racer and a former mechanic. I have personally experienced this problem in the past. That is a fact not an opinion.

There are guys on these forums that have fouled their HTO plugs on forced induction too. As you said they arent running boost all the time and that is why they get fouled sometimes.

xxDerek

That's nice that you are a drag racer and former mechanic, but fouling plugs can be caused by many things, I HIGHLY doubt the leading cause of fouling them is because they are a range colder and you're not in boost all the time, sorry but sounds pretty far fetched bud.

SirKnightTG

I read somewhere online about HT0's being fouled by some race gas. I guess there's something in some of the race gas that HT0 doesn't like.