Quote:
Originally Posted by ZDan
1st thing I'd do is swap the stock front sway bar back in. Stiffer rear springs after that.
I'm running 7k front with 9k rear RCE SS-2 on my '23 BRZ with stock sways. It is admirably neutral, even around the long turn 5 at Palmer CW (aka "Remlap) where my old '17 PP suffered a *lot* from terminal understeer!
Having played around with spring rates in other cars, IMO going from 7/7 to 7/8 isn't worth doing, go straight to 9k rears.
FWIW I'm very camber limited up front due partly to the RCE/KW top-mount design and partly some built-in asymmetry with my car, so I'm only running -3.2 front camber (at the left front anyway, sometimes more on the right for CCW circuits). While I'd like to run -3.5, IMO even if pyro temps and wear patterns may suggest "more front camber!" you are already at a point where more front camber isn't likely to give any big noticeable changes to handling balance, but no reason not to try it...
Oh yeah, also worth mentioning I have to run a LOT of ballast, 150+ lb, which all goes in the spare tire well along with the spare from my old '17 PP, so my weight distribution is quite a bit les nose-heavy at 51.5%F/48.5%R. So YMMV at closer to 55/45 stock weight dist...
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Well I already got the 8K springs per RCE and I can always try 9k down the road.
For autocross we have a few who in the GR (1MM larger rear sway) drive with Redshifts (revalved BC coils) and had tons of issues putting power down with a 8/9k combo and a 19MM front bar on stiff. Their fix was lots of toe in, in the rear and a 22MM front bar.
Based on that I thought I’d keep the 22MM front bar, and try 7/8k. But I had one person also mention trying to put the stock front bar back on.
It seems I should definitely try the rear 8k spring, and possibly try the stock sway. The problem is an event happens each weekend and I treat it as a test and tune, so I could make 1 change at a time, or both (I guess).
Curious as to what settings you run front and rear for rebound and compression as well.
Edit:
The 2022 GR86 uses the 2017-2020 set up, 18mm front and 15mm rear.
The 2022 BRZ uses a new 18.3mm hollow front bar and a 14mm rear.
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