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-   -   Maximum rated horsepower allowed in factory stock cars (https://classracer.com/classforum/showthread.php?t=71827)

SSDiv6 12-27-2018 05:35 PM
Re: Maximum rated horsepower allowed in factory stock cars
 
Quote:
Originally Posted by bsimms89 (Post 579159)
I see what you say about the 25.6 being good up to 5,000lbs but only 7.99ET, but in the rule book NHRA says stock cars running faster than
8.50 must have an SFI 25.4 or SFI 25.5 cage, no mention of 25.6, and these cars are becoming capable of 7.99

NHRA can opt the use of the SFI 25.6 for the Hellcat and hope they don't go faster than 7.99

trode424 07-09-2021 06:48 PM
Re: Maximum rated horsepower allowed in factory stock cars
 
I know this is a old thread, but has anyone got any clarification on this? Thanks, Todd

SSDiv6 07-09-2021 07:00 PM
Re: Maximum rated horsepower allowed in factory stock cars
 
Quote:
Originally Posted by trode424 (Post 643332)
I know this is a old thread, but has anyone got any clarification on this? Thanks, Todd
Nothing has changed.
This is the only SFI Guidance applicable to drag racing stock body cars:

SFI Spec 25.5D - Full Bodied Car Stock or Modified/OEM Floor Pan and Firewall with OEM Frame or Uni-Body Construction
– 7.50 to 8.49 Seconds; 3,600 lbs. Maximum
Effective Date: May 5, 2018

SFI Spec 25.6 - Full Bodied Car Stock / Truck or Modified/OEM Floor Pan and Firewall with OEM Frame or Uni-Body Construction
– 7.99 to 8.49 Seconds; 5,000 lbs. Maximum
Effective Date: August 26, 2016

trode424 07-09-2021 08:09 PM
Re: Maximum rated horsepower allowed in factory stock cars
 
Quote:
Originally Posted by SSDiv6 (Post 643333)
Nothing has changed.
This is the only SFI Guidance applicable to drag racing stock body cars:

SFI Spec 25.5D - Full Bodied Car Stock or Modified/OEM Floor Pan and Firewall with OEM Frame or Uni-Body Construction
– 7.50 to 8.49 Seconds; 3,600 lbs. Maximum
Effective Date: May 5, 2018

SFI Spec 25.6 - Full Bodied Car Stock / Truck or Modified/OEM Floor Pan and Firewall with OEM Frame or Uni-Body Construction
– 7.99 to 8.49 Seconds; 5,000 lbs. Maximum
Effective Date: August 26, 2016
Does 3600 include driver? Ive seen plenty of 2018 and up copo's and cobra jets running FS/AA .


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