bigBADbenny wrote:Same 2.7 turn racks in postfl GT & tbSTi.
Preface GT got 2.5 turn racks.
Check your LCA bushes for cracks, steering knuckle for play…
I wasn’t happy with the steering initially and wound up with an STi solid steering u-joint, Whiteline RCA kit, AVO caster adjust LCA bushes, Whiteline rear upper outer caster correction bushes and 235 40 18 8.5 +35 wheels and Shockworks coilovers, lowered slightly with a finger gap between tyre top and guard lower edges, and all within stock alignment specs.
I’d say the important parts for improved steering feel are the RCA kit, added caster and the solid knuckle.
The pokey wider tyres with slightly lower profile than stock adds weight to the steering and helps clear the added caster.
The caster mod helps with straight line stability, return to centre and dynamic caster, at the expense of some added tyre shoulder wear. The latter isn’t an issue if the tyres are regularly rotated. I’m now on PS5 which can potentially be fully rotated side to side as well as front to rear (fact check required).
Still on the to do list: Shockworks caster adding front top plates: +7’ caster possible, install prefl rack or jdm GR STi 2.3 turn rack.
Thank you for the advice.
I drove the 07 GT today to compare to the 08 STI. The steering on the GT is heavier but gives more initial road feel.
I have tried both sets of rims/wheels on both cars with little or no noticeable difference.
18x 7.5, STI rims 225/40/18
18x7.5 Foz rims (48 offset) 235/40/18.
The STI includes minimal alteration but includes:Alloy OE LCA's with rear NEW Urethane LCA bushes and NEW front OE,
22mm front sway bar with urethane bushes,
20mm rear OE STI sway bar,
STI springs,
Reco Bilstein's and new top hats.
The GT includes:Rear NEW Urethane LCA bushes, complete new LCA's and replaced front urethane bush with OE,
22mm front sway bar with urethane bushes,
20mm rear sway bar with urethane bushes,
OE GT springs,
Reco Bilstein's and new top hats.
Both cars have STD wheel alignment and both handle like on rails.
The only difference is the STI feels lighter in the steering and therefore less feedback.
I shall check the steering rack bushes and look at your caster and RCA kit improvement. It could be the STI OE knuckle but it looks sound.
Other than the Brembo's the GT feels incredible to drive as both same bolt on mods and similar tune.
GT brakes with Intima SR and slotted rotors stops on a dime if pushed but I feel the booster may be tired. Any suggestions on replacement? will a Gen 5 Lib booster fit?
Thanks for advice.