IHRA HP Rating 1973 - 2 BBL 307 Nova ?

RileyRacingEntrprises · 07-15-2025, 02:27 PM

UPDATE

Called Them and they said they are using the same ratings BUT they are using indexes 3 tenths slower HOWEVER - When i look on their web site the listed indexes are the same as NHRA ? So i dont know

Anyone know where to find HP ratings for IHRA, or are they just going by the NHRA numbers ? I have a 73 Nova with a 307 that is factored with NHRA to the point im not spending a dime on it with that combo. I was wondering if IHRA may have a realistic HP rating for it so that I could actually race the car

07-15-2025, 02:27 PM	#1
RileyRacingEntrprises Junior Member Join Date: Mar 2023 Posts: 15 Likes: 4 Liked 25 Times in 8 Posts	IHRA HP Rating 1973 - 2 BBL 307 Nova ? UPDATE Called Them and they said they are using the same ratings BUT they are using indexes 3 tenths slower HOWEVER - When i look on their web site the listed indexes are the same as NHRA ? So i dont know Anyone know where to find HP ratings for IHRA, or are they just going by the NHRA numbers ? I have a 73 Nova with a 307 that is factored with NHRA to the point im not spending a dime on it with that combo. I was wondering if IHRA may have a realistic HP rating for it so that I could actually race the car Last edited by RileyRacingEntrprises; 07-15-2025 at 02:38 PM.