Michael
Comp Diesel Sponsor
- Joined
- Apr 25, 2006
- Messages
- 3,411
Here are the 2011 NHRA rules:
In other words, you aren't forced to put the battery in the back, but if you do you need to add the cutoff. The cutoff also MUST interrupt the charging circuit so that the truck quits running when the switch is turned off (usually done with a dual-circuit shutoff that disconnects the field/sense wire from the battery at the same time).
Other items that come to mind:
Locking transmission dipstick required 10.99 & quicker
Aftermarket axles required 10.99 & quicker - however most tracks seem to accept full floating axles in lieu of aftermarket (following common sense).
In other words, for virtually all of the trucks here they should only need a roll bar. The rollbar requirements are shown in the NHRA rulebook, but they are basically a 5-point minimum (main hoop, 2 rear braces, and one sidebar next to the driver). The part that seems trickier is how you mount it to the frame, as most truck frames don't stick out far enough towards the outside of the truck.ROLL BAR
Roll bar mandatory in all cars (including T-tops) running 11.00
(*7.00) to 11.49 (*7.35), in convertibles running 11.00 (*7.00) to
13.49 (*8.25), and in all dune-buggy-type vehicles running 12.00
(*7.50) seconds and slower. Permitted in all cars. See General
Regulations 4:10, 10:6.
ROLL CAGE
Roll cage mandatory in cars running 10.99 (*6.99) or quicker or any
car exceeding 135 mph. In full-bodied cars, with unaltered firewall,
floor, and body (from firewall rearward, wheeltubs permitted),
running between 10.00 (*6.40) and 10.99 (*6.99), roll bar permitted
Section 4A, page 4 Super Pro, Pro, Sportsman
in place of roll cage. In convertibles running 10.99 or quicker or
exceeding 135 mph, roll cage mandatory.
MASTER CUTOFF
Mandatory on any car with a battery running 9.99 (*6.39) or quicker,
any car exceeding 135 mph, or on any car where the battery is
relocated into the trunk area. See General Regulations 8:4.
In other words, you aren't forced to put the battery in the back, but if you do you need to add the cutoff. The cutoff also MUST interrupt the charging circuit so that the truck quits running when the switch is turned off (usually done with a dual-circuit shutoff that disconnects the field/sense wire from the battery at the same time).
In other words, 10 second trucks would need a trans shield/blanket. Keep in mind that "hard" shields are only good for 5 years, and blanket-type shields are only good for 2 years.TRANSMISSION, Automatic
Spring-loaded, positive reverse lockout device and functional
neutral safety switch mandatory. Transmission shield meeting SFI
Spec 4.1 mandatory on any car running 10.99 (*6.99) or quicker or
any car exceeding 135 mph. Automatic transmission flexplate
meeting SFI Spec 29.1 and flexplate shield meeting SFI Spec 30.1
mandatory on cars running 9.99 (*6.39) or quicker or any car
exceeding 135 mph. See General Regulations 2:12, 2:14.
Other items that come to mind:
Locking transmission dipstick required 10.99 & quicker
Aftermarket axles required 10.99 & quicker - however most tracks seem to accept full floating axles in lieu of aftermarket (following common sense).