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Doug Blackley · 10-01-2008, 06:46 PM

Unless IHRA listed an adjustment, they use the original factor from NHRA but not their refactor. Example the 85 305 150 hp combo is at 258 in NHRA and 250 in IHRA.

10-01-2008, 06:46 PM	#5
Doug Blackley Member Join Date: Dec 2001 Location: Hanover, MA Posts: 430 Likes: 3 Liked 1 Time in 1 Post	Re: IHRA class HP ratings Unless IHRA listed an adjustment, they use the original factor from NHRA but not their refactor. Example the 85 305 150 hp combo is at 258 in NHRA and 250 in IHRA. __________________ Doug Blackley 1697 STK