Thread: Tech inspections

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Originally Posted by gassersrule_196

so what are the rules for securing harness's? anybody got the rulebook?

Crotch Strap:
The crotch strap must be anchored even with or behind the chest line of the driver. Lay a flat board against the driver's chest/stomach with him seated in the car in driving position. Looking at the board from the side of the car, follow that line down to the floor. The strap needs to anchor there or behind there, never in front of that point. The strap should be mounted so that the line of pull is to the front of the car. If mounted directly to the sheet metal of the floor of the car, put a very large and very thick flatwasher on the underside to prevent the nut from being pulled through the sheetmetal in the event of an "incident", as NHRA calls them. A bulletproof installation will be to extend the belt back to the driveshaft tunnel bar that I have described under seat belts below and cut a hole in the seat for the belt to come up snugly against your privates to attach to the seat belts.

Seat Belts:
Seat belts should be installed so that as you view the driver from the side, the belts go down to their mounting position at a 45* angle. As viewed from the rear, the belts should be the width of the driver's body and parallel with the centerline of the car. The best way I have found to mount the seat belts is to install a bar across the car between the left and right sides of the "B" bar, or main hoop with a whoopee in it for the driveshaft tunnel. 1 1/4" x 0.125" mild steel or 0.083" CM should do the trick.

Shoulder Belts:
The anchor for the shoulder belts should be from exactly even with the driver's shoulders to a point no lower than 4" below the driver's shoulders. In no case can the belts be mounted higher than the driver's shoulders. (Think about the car on its lid and the driver "falling up" into the belts and bumping his noggin). The place to mount these is to the crossbar that goes between the left and right sides of the "B" bar. This crossbar forms an intersection with the side bar at a point about halfway up the "B" bar. Its placement is determined with the driver sitting in driving position, then installing the bar according to the height of the driver's shoulders. The belts should go from the driver's shoulders back to the crossbar parallel with the centerline of the car.