IHRA at Columbus.

ALMACK · 07-11-2025, 03:44 PM

I understand that IHRA is using indexes .3 slower than NHRA.

I am wondering how IHRA determines the current " factored" hp for Stk/SS ?

Do they use NHRA's published hp numbers ?

Also, I heard there was a racer running the same vehicle in Stock as well as Super Stock @ Columbus.

So my mind got thinking....I am wondering if NHRA has wording somewhere that prohibits a same vehicle/same driver running 2 classes at the same event ?

07-11-2025, 03:44 PM	#20
ALMACK VIP Member Join Date: Jan 2009 Location: Bardstown, KY Posts: 1,937 Likes: 131 Liked 369 Times in 127 Posts	Re: IHRA at Columbus. I understand that IHRA is using indexes .3 slower than NHRA. I am wondering how IHRA determines the current " factored" hp for Stk/SS ? Do they use NHRA's published hp numbers ? Also, I heard there was a racer running the same vehicle in Stock as well as Super Stock @ Columbus. So my mind got thinking....I am wondering if NHRA has wording somewhere that prohibits a same vehicle/same driver running 2 classes at the same event ? __________________ Alan Mackin Stock 3777/ SS 3377 P/SA & SS/PA Fox Thunderbird I/PS '95 Mustang GT