Quote:
Originally Posted by captainhook
Haha, I'd be willing to bet it'll make its way back onto TST eventually.
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If so, I'd have a couple ideas for the next owner to look into provided they were a suspension junkie.
More seat time in the Evo has me thinking back to my GD experience. Ultimately, I'm of the mindset that there is really nothing you can do to get enough front grip out of the 04-07 STi platform. Let's go over what I had done to increase front end grip:
Tires, alignment, ALK, cc plates, sways, roll center kit, lowered cg, higher wheel rate.
I could have increased caster up front another .5 degrees or so with the free castor mod, but I highly, highly doubt that that would have cured the cars natural inclination to losing traction up front in a turn...either on entry or out of the apex.
now..i could have MAXED the front out with another degree of negative camber to bring it up to -3 and have done the free castor mod on the control arms to get another .5 degrees of castor, but I honestly think thats the very absolute limit to what the car can do and ultimately is going to affect tire wear aka, don't do it on a street car unless you plan on going back down on the negative camber for even wear.
So you're left with two viable options to coax the rear end out instead of the front washing out...the first choice is by using the rear swaybar to increase the effective spring rate of the rear suspension....the other choice is to run higher rebound on the T2s in the rear vs. the front to stiffen up the damper.
The trouble with these two options is that they both sacrifice ultimate overall grip of the car in order to acheive a better balance. This would take track testing to verify, but I'm of the mindset that the car would be slower by doing this, albeit more fun to drive.
So to me, my GD was maxed out for all realistic intent and purpose. Subarus answer in 08 was to reposition the front end suspension a tad to coax more dynamic castor out of it, but i'm unsure of the SAI angles on it and the ensuing camber curve to make any predictions of how it would react...
Cliff Notes: The GD understeers unless you sacrifice overall grip to attain oversteer.