I haven't tried this as my race experience is in a cumbersome old sedan where niceties like C of G are the least of worries,but how about-
1.find the 'rocking point' of the car front/back at 90 DEG centreline
2.find rocking point for side/side-a bit trickier but yes line of crankshaft might be a good guess.
3.intersect two lines and bingo
4.build up your data by repeating 1 and 2 with various ballasts,unsprung weight removed etc.Soon you may have enough to make your own spreadsheet.
5.If your racecar can generate .8g,is it a simple arithmetic proportioning
inside to outside wheels of the front and back wheelsets scaled weights ?? eg if front wheels carry 300 kg total static,at 8g is outside wheel carrying 240 kg ?
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