Stampie PowerDork
6/20/19 12:51 p.m.

This comes up often enough. I'll start out with this quick reference chart Angry posted.

maschinenbau SuperDork
6/20/19 4:04 p.m.

Relevant stuff for Challenge cars I've been accumulating. I'll add to it as I have the time.

Relocated battery

  • Relocated = anywhere other than stock location.
  • Must be in a vented container or separate compartment from driver.
  • Must have cut-off switch accessible and labeled from outside rear of car.
  • 3/8" bolts to secure it.

Roll bar rules

  • All convertibles faster than 13.50
  • All fixed roof faster than 11.50

Can't bend roll bar tube? Buy one on Amazon for under $50! Punch the P/N into Summit's website for the full measurements to make sure it fits. Other sizes also available.

Driveshaft/Axle Hoops

  • All cars with slicks, no matter how slow
  • All cars faster than 10.00
  • Beefy 2"x1/4" full loop flat bar (heavy)


  • Tank must have DOT certification. It's like 5 or 10 years. You can get this done as a hydro-test facility (think fire extinguisher servicers) for under $20
  • Bottles inside passenger compartment must have blow-down tube that exits the compartment
  • Must have safety burst disk
  • Driver must have SFI flame suit.


  • 11.99 and quicker: any tubeless tires must have metal screw-in valve stems
  • All street tires minimum 1/16" tread depth

Good resources I've been accumulating:

Guide to passing Tech

SFI guide on seating and belts


Daylan C
Daylan C UberDork
6/20/19 5:05 p.m.

So no mother bottle in the back of my wagon. Got it.

Stampie PowerDork
7/11/19 7:22 p.m.

Found this link. It has some good reading.

surfshibby07 New Reader
7/11/19 10:17 p.m.

Excellent information. Thank you for posting this. 

spacecadet Dork
7/12/19 4:00 p.m.

Solid info.. Thanks for taking the time to make it easier to find!

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