With my 1979 Porsche 924 Classic Production build finally nearing its' end, I scaled the car today to see where all my work came out to get the car as close as possible to just over 50% rear weight and as near to 25% on each wheel. BTW, those goals were gleaned from talking to several LSR racers, so I hope they're valid! With my weight ballast in the drivers seat, a full fuel load, and all fluids and equipment in place the car totalled 2,584 pounds (that includes 40 pounds of ballast located in the center rear) with the varous ways to measure that came out as follows:
LF weight 661 pounds or 25.5%
RF weight 612 pounds or 23.6%
LR weight 651 pounds or 25.1%
RR weight 660 pounds or 25.5%
Total left side weight 1,312 pounds or 50.7%
Total right side weight 1,273 pounds or 49.2%
Total front weight 1,273 pounds or 49.2%
Total rear weight 1,311 pounds or 50.7%
The LF/RR cross weight is 1,321 pounds or 51.1%
The RF/LR weight is 1,263 pounds or 48.9%
With all this as background, do I stand pat or should I tinker with the ballast to get more rear weight, or perhaps try to get closer to a 50/50 cross weight (assuming that matters much at all in LSR)? Likewise, I plan to align the front end at near zero camber, a very small amount of toe in and lots of caster. In the rear I plan to go zero camber and zero toe. In the case of both the intended alignment and ballasting issue, I'd appreciate any input as this is my first foray into the LSR sport after many years of road racing.
Rick