KehoeAutomotive

I'm told I need to run a spark plug that is one heat range colder than stock when you increase the horsepower by 75. I assume that means both leading and trailing. Is this correct?

The stock NGK part numbers are BUR9EQP

and

BUR7EQP

The nine and seven I know refer to the heat range. However these is no BUR10EQP spark plug.

Any suggestions on part numbers for NGK?

Thanks so much!

DaleClark

iTrader: (55)

Read up on spark plugs, there's TONS of options and such out there. For most people, just running all 9's is fine - that's what I do. It really depends on how much horsepower you're looking to run.

I would look at the single turbo forum, they're constantly playing with spark plugs. But, for a start, I'd just run all 9's. Reliable, don't foul out, and work just fine.

Dale