Quote:
Originally Posted by churchx
@ ZDan: but usually all tires in set would have overall drop in grip then, if they had been the culprit, and it wouldn't change grip balance front/rear, just lower overall grip level. |
He has lost grip overall. TC is more active for him indicating lost rear grip as well, when it becomes active it conserves rear grip and he gets push. When he turned off TC completely, the handling balance improved as rears were allowed to slip balancing the push. It seems to me like a general lack of grip, front and rear.
Quote:
|
As for spring rates .. recalling questions to RCE about why some coilovers have different front/rear springrates, some square and so on
|
For sure a very wide range of spring rates front/rear can work, but there are *limits* to this. Having the front end of the car more than TWICE as stiff as the rear, is IMO exceeding the limits. Having same *spring* rates front and rear is about as front-biased as you want to go. with *even* spring rates, say 6kg/mm square you get 5.4 front and 3.4 rear wheel rates. That is quite front-biased already. Stiffer front springs goes way too far with front bias.
For spring rates, IMO you want the rear springs to be *at least* as stiff as fronts, up to about 1.5x as stiff as fronts.
Front springs 1.33x stiffer than rears? It's a bad place to be. Yeah bumpstops and damping play roles but the basic wheel rates should still bear some resemblance to weight distribution. Front wheel rate >2x stiffer than rear wheel rate is too much front bias. And understeer-inducing...