Quote:
Originally Posted by ZDan
Should have gone into current setup:
Swift BRZ Sport springs (3.8F/4.5R)
Raceseng camber plates
Stock PP/Sachs dampers, with bumpstops cut down from ~60mm to ~25mm
This setup is semi-OK at the track, but on the street the loss of front bump travel is intolerable. The Swift BRZ Sport springs lowered the car 1.5" front and 1.25" rear, I added in 1/4" spacers to the front upper spring seat to give -1.25" all around. Note that Raceseng camber plates cut significantly into bump travel, ~15mm IIRC from measuring.
At the track the lack of front bump travel helps to minimize roll during cornering but gives mid-corner understeer which is tolerable at most tracks but sucks at Palmer CW Turn 4...
Would like to go stiffer on spring rates all around while increasing front bump travel significantly.
|
With being down only 1.25" in ride height, if you're on the bump stops that often I think that's indicative you need higher spring rates and a damper valved for those rates. It'd be probably be worth investigating Bilstein B14 and getting it custom valved so you can run 6-7k springs in the front and maybe a little higher in the rear, depending on your tires and aero.
Are you running any aero? It can have significant impact on the necessary spring rates.
I'm not sure who all the tuners for Bilsteins are, but I've heard good things about FCM.