1 or 2 step colder plugs?

JC671 · 05-23-2011, 12:35 AM

Quote:

Originally Posted by modme

Here you go: HKS USA M-Series Super Fire Racing Spark Plugs

Thanks, I appreciate it.. What heat range did you go with? Is 8 one step colder from stock or its the stock range? Is 9 two steps colder from stock?

been running these since day 1 with twin turbos.

Quote:

Originally Posted by Dembflyr

Got mine from GTM. I'll have to check the part number when I get home later in the week.

Thanks

Quote:

Originally Posted by wstar

The ideal you're shooting for is "just cold enough to not cause any dangerous knocking" + "hot enough to keep itself clean so it doesn't foul quickly and misfire". It's a delicate balance, and going colder when you don't need to can be detrimental in the long run if those colder plugs build up carbon fouling.

Understood.. With any F/I setup though, I don't think the stock plugs were rated to handle the increased temps though.. I'd rather be safe than sorry plus zex recommends it

wstar · 05-23-2011, 07:38 AM

Quote:

Originally Posted by Messiah_671

Understood.. With any F/I setup though, I don't think the stock plugs were rated to handle the increased temps though.. I'd rather be safe than sorry plus zex recommends it

I understand the FI thing. Just on a lot of other forums/cars, people have jumped on the "1 step colder" bandwagon on lightly-bolted-on cars. Given that our plugs are already quite cold, I want people to be aware it's probably a patently bad idea unless your setup really warrants it (e.g. FI).

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