colder heat range spark plugs, need part number?

[jongearparts]

for boosted applications what spark plugs are you using and please include a part number. thanks

[Razathorn]

for boosted applications what spark plugs are you using and please include a part number. thanks

A member over at clubrsx has tested quite a few plugs for boosted K applications and I tend to agree with him, as do most folks I've seen boosting at clubrsx.

If you plan on boost, the NGK Iridium IX BKR8EIX (part#2668) are the best i have tested for boost. Alot of guys are using them now. Gap will depend on your set-up, but usually in the .030-.032 range.

I am using the BKR8EIX -- they are one step colder than stock. The '8' is the temperature rating, 7 being stock, 8 being one step colder, and 9 being two steps colder. For most applications, 8's are perfect. If you're going more than 10 psi, or are driving in really cold conditions, 9's may be better for you. Every car is different.

When you gap iridium plugs, do not use a wheel gapper to touch the center electrode -- use either a gapping tool or a pair of needle nose pliers to open the gap if widening it. Use feeler gauges (or plug gauge) to determine proper gap after that. The electrode is sensitive and can cause hot spots if scratched and is very brittle as well.

[jongearparts]

thanks