Hp level and change spark plugs?
02-26-2009, 04:40 PM
#1
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Hp level and change spark plugs? Is there a general rule of thumb with rwhp numbers, that determines when a colder plug is needed. Ie, 500 rwhp use Tr-55. 600 rwhp use TR-6............etc.
02-26-2009, 06:05 PM
#2
I dont think there is a hp # for that. Its more in what power adder you have. IE forced induction or go gas. I run a tr6 plug with my FI set up but I'm sure if the the car is tuned right you could have a big cubed N/A moter on tr55's making 600hp.