PDA

View Full Version : bumpsteer help


ghostsnake
11-29-2008, 02:14 PM
i was coming down from nc when i notice undesirable steering whenever i hit a bump, im sure the bumsteer need some adjustment, anyone have some further experience on adjusting bumpsteer?..any help would be greatly appreciated

marv

ghostsnake
11-29-2008, 03:05 PM
tt anyone

///Mcompact
11-29-2008, 06:48 PM
It looks like you've lowered it quite a bit. You'll need to adjust the roll center of the front end. When your suspension is compressed, one of the three links (most likely tie-rod) to keep your wheels on the axis is unequal in length (or not centered anymore) and is causing toe out/in, making your tires turn without any input from your steering wheel.

With Evos, we use taller Tie-rod ends to lower the rod back to zero roll center to offset the angles from lowering the front-end (in our case..the tie-rod is back to parallel to the ground instead of angled up). I have coilovers, but didn't lower my car much at all because I didn't want to mess with the geometry. Automakers (as of late) design the suspension to have very little bump steer, but once you lower it, you run into it.

You can even have bumpsteer issues in the rear. I do have the rear of my car lowered a bit and there is bumpsteergoing on back there when I'm close to lifting a tire at an AX event (decompressed), but it's not something I run into on the streets. It is fixed by using a corrected control arm bushing.

So you can either raise it back to stock height and realign the wheels or correct the roll center by figuring out which suspension link is pulling/pushing your wheels during compression and install the correcting part. There are a lot of lowered mustangs, so there has to be a aftermarket solution to fixing the bumpsteer...and getting a final alignment accomplished.


**Edit** Here you go:
http://www.steeda.com/products/bumpsteer_kit.php

ghostsnake
11-29-2008, 08:40 PM
appreciate it man, i never had the problem not until i went from IRS to solid axle, i guess ima check the back

LXtasy
11-29-2008, 09:49 PM
Kiley is right. Get that part and some of the steeda balljoints and call it a day. Your rear is more solid now than the irs. I belive the irs was cushioning the problem and with the irs gone you notice it. I believe it is because your are lowered. My red truck and black truck did/does the very same thing. Red truck was bagged and I rode low. But once the front end was raised to factory height it was fine. Black truck does it because it is lowered and the skinnies don't help either.

slowgreen99
11-29-2008, 10:28 PM
What springs are you running?

ghostsnake
11-29-2008, 11:13 PM
running steeda in the back and h&r on the front

slowgreen99
11-30-2008, 12:50 AM
running steeda in the back and h&r on the front

not being a dick but theres your problem. I have H&R springs too and they are too dang low and rough as hell. But ill take the sacrifice for the stance! Ive had to replace my ball joints twice. Good luck with gettin rid of your problem.

ghostsnake
11-30-2008, 02:01 AM
not being a dick but theres your problem. I have H&R springs too and they are too dang low and rough as hell. But ill take the sacrifice for the stance! Ive had to replace my ball joints twice. Good luck with gettin rid of your problem.

i see where ur gettin into bro, well ima try to solve the problem tommorow before i leave town im sure its gona be a rough ride if i dont fix it