Big Thumper
N2O Pusher
- Joined
- Jan 7, 2008
- Messages
- 324
Heh, keyboard caging.
Mike P - here's where the 3600 lb. bogey comes from: http://www.sfifoundation.com/drag.html
Spec 25.5 - Full Bodied Car Stock or Modified/OEM Floorpan and Firewall with OEM Frame or Uni-Body Construction – 7.50 to 8.49 Seconds; 3,600 lbs. Maximum
That's the 'FULL' cage spec for the guys running sub-8.50 that would apply to these trucks (I haven't seen a copy of it). That's the spec that you need to meet / exceed if your vehicle weight / speed is above the line in the chart I posted earlier.
In a typical 'car', from 8.50 to about 10 - 11, you need the NHRA spec'd 8-point cage (to note - removable door bars allowed).
From 11-ish up, as long as the floorpan / frame / firewall aren't modified, you can use a 5-point rollbar.
I left my NHRA book at work - will grab it tomorrow and bring it home to run the equivalent numbers. The break is somewhere right in the 10 - 12 second range for Sportsman racing, between where you need the 8-point cage with full halo or only the 5 point rollbar.
Mike P - here's where the 3600 lb. bogey comes from: http://www.sfifoundation.com/drag.html
Spec 25.5 - Full Bodied Car Stock or Modified/OEM Floorpan and Firewall with OEM Frame or Uni-Body Construction – 7.50 to 8.49 Seconds; 3,600 lbs. Maximum
That's the 'FULL' cage spec for the guys running sub-8.50 that would apply to these trucks (I haven't seen a copy of it). That's the spec that you need to meet / exceed if your vehicle weight / speed is above the line in the chart I posted earlier.
In a typical 'car', from 8.50 to about 10 - 11, you need the NHRA spec'd 8-point cage (to note - removable door bars allowed).
From 11-ish up, as long as the floorpan / frame / firewall aren't modified, you can use a 5-point rollbar.
I left my NHRA book at work - will grab it tomorrow and bring it home to run the equivalent numbers. The break is somewhere right in the 10 - 12 second range for Sportsman racing, between where you need the 8-point cage with full halo or only the 5 point rollbar.