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Old 2007-07-30, 02:14 PM   #13
ddub
EJ22
 
Join Date: Aug 2005
Location: Reno, NV
Posts: 110
 
Car: 04 wrx, bunch of mods
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Quote:
Originally Posted by Dean View Post
Ah, 225 18s at relatively high pressures... What tires?

I don't see that you said if those alignment numbers were before or after you put on the coilovers and set them at that height? Those camber numbers are fairly positive even for a stock Impreza.

Do you still have your stockers? If so, put them on and tell us how it feels at OEM tire pressures on the same road.

By changing to 18s, you have added probably 100+ pounds of basically undamped spring rate to your suspension. (Austin, help me out here...)

That is tolerable on stock struts, but as almost everyone who has tried 18s on Imprezas has found, it is not fun, especially on coilovers with limited adjustability. 17s appear to be about as far as most go for the street.

Also, as I mentioned, you are in negative camber land at your ride height due to the Imprezas suspension geometry. Any amount of lateral load is going to quickly take your outside front to zero and then quickly positive. So, while not directly related to bounciness, If you want the car to handle remotely well, you will need to raise that ride height at some point

Depending on the road, you may even be running out of damper throw at that ride height. At rest, how much damper piston shaft is visible? Did you happen to see how much was visible at full compression of the damper before you installed it?
Those camber numbers are post coilover installation. The car still seems to corner well, even with the low ride height. I had my 18s on with king lowering springs and it was never bouncy with that setup. For lowering the coilover, you actually screw the whole coilover up or down, it does not affect the strut travel. You can adjust ride height by screwing the strut up, but I never did that and don't want to. So I should be getting full strut travel. When I get the softer spring rates, I will be raising it up. I will probably get a better alignment of -1 f and -1.5 to -2.0 r.
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