by btaylor » Fri Apr 03, 2015 11:52 am
Never heard the 24" theory before, but i dont doubt it a bit! I used to own and run a 40 Chevy coupe, that ran under the name "Frustration II" It was a B/G Car in the late sixties. I got to know the original builder of the car, and he showed me how he/ they used to set up the Ladder bars for gassers back then.
They would use two floor jacks on either side of the car, and lift it off the ground with a beam run underneath. when they found the balance point, they would mount the front mount for the ladder bars 6" ahead of that balance point. it would cause lift when the rear axle rotated,and would push down hard on the very hard compound slicks of the day. If you notice through pictures of the era, As tire science came around the nose of the cars came down as well. transfer of weight for traction was not as necessary as it was with hard compound tires.
The tall rear slicks dictated the front off the car be raised above the centerline of the rear axle to aid this transfer of weight for traction, so basically, the taller the rear tire was, the higher the front ends went. Most of these cars were converted from street cars,and lesser drag classes, so as the engine power grew, the tires did too, and thats where the rear wheel wells got cut out. If any of you have ever restored one of these old cars, you know that the technology of that era would scare the hell out of most folks. One of many i have been involved with, had aluminum tubing for all the steering arms to save weight. Not much thicker than a lawn chair framework! all painted black to get past inspection, and save maybe five pounds.
its a wonder we ever lived through those racing years!
Bob