Aftermarket/Replacement Cylinder Head Rule Change

SS734 · 12-13-2017, 01:59 PM

Its coming out with the HP releases next week. NHRA is deleting all the different HP factors and combining them all in to one factor for each combo that has approved aftermarket heads.
I was wondering if anyone knew how they were going to determine the new "single HP factor" where the OME head was rated higher than the aftermarket head HP factor and vice-a versa?

12-13-2017, 01:59 PM	#3
SS734 Junior Member Join Date: Apr 2016 Posts: 27 Likes: 5 Liked 4 Times in 3 Posts	Re: Aftermarket/Replacement Cylinder Head Rule Change Its coming out with the HP releases next week. NHRA is deleting all the different HP factors and combining them all in to one factor for each combo that has approved aftermarket heads. I was wondering if anyone knew how they were going to determine the new "single HP factor" where the OME head was rated higher than the aftermarket head HP factor and vice-a versa?