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Old 05-22-2018, 12:05 PM   #4624
Icecreamtruk
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Join Date: Dec 2015
Drives: Track preped NA FRS
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Quote:
Originally Posted by strat61caster View Post
Think about it like balancing a table, a corner balanced car is a flat table, but not necessarily a level one. Put a ball in the center and it should roll off one side dead center, not head towards a corner.

If you take a table and lift one side of it equally (adding or subtracting rake is likely what you're doing) you only changed the 'levelness' in one direction. Since corner balance is a balancing of cross weight (RF+LR or LF+RR) lifting one side (say by shimming two legs equally) of the car/table doesn't change the 'cross-balance' of the system.

tl;dr if you're moving one side of the car evenly (i.e. raising the rear by X turns) your crossweight shouldn't be drastically changed.
Well, the table analogy makes perfect sense and I've heard it before many times as well, except tables rest on solid legs, not springs. So while not having perfect cross weight would mean effectively one wheel is in the air if the car had no suspension, it means just a little less load on one wheel relative to the rest.

For the ride height change, I changed the rear, lifted it up by 1inch to get more rake and more oversteer. But then I raised the front left side because I had an issue where my tire was rubbining on the top of the fender inside enough that it ate all the plastic, the paint in the metal and polished shiny. It was enough to lock the steering wheel in whatever position it was while it was rubbing (turn one on Mont-Tremblant for those who know the track, right hander with big elevation change at the end of a straight, taken flat out at around 110mph, scary moment to have your steering locked in place, since it is followed by a blind drop into a turn, wrong position and you are along for the ride to the barriers).

So anyways, everything you say makes sense in my head, and I took it for granted, until 2 weeks ago when I was at Mont-Tremblant, makes changes that should've made the car worse but I had to do them to save tires and fenders ended up making the car better and faster. Im sure there are other things at play, but it seemed to me like cross weight mattered little to nothing there.
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