Corner Scales
In February, I went to my Solo Chairman's house to weigh my '06 WRX TR on the corner scales he recently purchased from C-DOC. After receiving them in the mail, he sent them out to a specialist to have them calibrated within 1/10th of a lb. His 2001 Corvette Z06 weighs 3,150lbs exactly on these scales with a full tank of gas.
He built a ramp system out of wood for the scales, and after adjusting it for my car's wheelbase and width, I drove her into place.
We then measured my car's weight w/o driver and w/ driver. My car had an indicated 1/3 tank of gas which I confirmed later by driving to a Shell Gas Station immediately after leaving his house and filling up with 10.13 gallons of gas - so 5.8 gals were in my car at the time of the weigh in (15.9 gal tank). I also performed the required SCCA weight reduction and removed my spare tire and all-season rubber mats.
Results were as follows:
w/o Driver
LF 919lbs RF 932lbs
LR 636lbs RR 569lbs
Total weight: 3,056lbs (Front 61%, Rear 39%)
Left-side: 1,555lbs; Right-side: 1,501lbs (Left 50.9%, Right 49.1%)
w/ Driver (170lb driver w/ seat-belt on AND both of my hands on steering wheel)
LF 990lbs RF 951lbs
LR 691lbs RR 594lbs
Total weight: 3,226lbs (Front 60%, Rear 40%)
Left-side: 1,681lbs; Right-side: 1,545lbs (Left 52.1%, Right 47.9%)
These measurements were done on my factory wheels with heavy 225/45/17 RE070 tires. My racing 17x7 SPT wheels with 225/45/17 Victoracers will be roughly 8lbs lighter per corner.
A few pics:
I'm extremely happy with these results as my racing weight (with racing wheels & tires) will be over 30lbs lighter i.e. 3,025lbs w/o driver and 3,195lbs w/ driver.