Thread: Got a lot of understeer

Hello guys, so last friday i tried to change all my cars bushings for new ES uretane bushings. The issues is that i only got chance to change the ones from the front of the car.

Then i went to the track the next day and the car now have a lot of understeer its not cornering whell... what can i do now to fix this?

If you have having a lot of understeer, you need to stiffen the opposite end.

In this case, you took an already understeering car, tightened up the front end cand caused it to understeer more.

You should have tackled the rear bushings first. That would have produced slightly more oversteer than previous and not gone the wrong direction (so to speak) and made the car understeer more.

To avoid taking those out, stop adding any reinforcement to the front and start tightening up the rear of the car instead of the front. (rear sway bars, rear strut tower bar, rear upgraded bushings all around).

I already bought the rear bushings, now i have to install them and i was thinking on buying the rear Progress sway Bar. I have the tower bars up front and on the rear.

Hope this helps.

Thanks

To immediately fix you have with what you have told me, you can remove the front strut bar, that will give you a minimum swing towards making the car rotate better.

For now, leave the front be and install stuff on the rear to make it tighter and the car WILL rotate better and not worse.

A progress rear sway bar will definitely help. I would not get a front sway bar until you stiffen up some more of the rear and see if the car is where you want it to be.

Stiffening the rear will induce more oversteer and overcome the dreaded understeer! How much you want to rotate is 99% subjective to the driver and application.

the suspension gurus also say not to install the rear es bushings because it causes binding in the rear

One of the sets of bushings can cause binding. If properly left out of the equation, can cause beautiful, almost wonderful things to happen in the rear

This is a B14 so replace what you can in the rear. Add a sway bar and it should be ok.

B14 recipe for moar fun:

-Bend rear beam to zero toe
-Progress rear stabilizer bar
-Rear strut tower bar (Bolt In Bars makes a great one, personally recommend)
-SuperPro rear trailing arms bushing replacement
-Scott Russell replacement links (probably custom at this point)

The more you lower the stock beam, the more the Scott-Russel link acts out laterally and makes the car "dog-track" or "crab-walk" while going down a road. This affects left and right handed turning abilites.

It actually causes more binding. The rear of the B13 binds from the factory (in two different ways). The main binding problem is made worse by the ES bushings. (The minor binding is actually relieved by the ES bushings, but the net effect is much worse binding.)

There are two bushings in the rear (out of the total of 12) that you can replace and not increase the binding too much. You can do either the chassis-side of the control link, or the knuckle-side and that's it.
Hardly worth it IMO.

OP, it sounds like you need an alignment. Usually things don't get out of whack when you install front bushings, but if you messed with the tie rods at all then you've thrown your alignment off. Also, it's possible you need an alignment anyway. That would be my guess.

Just putting stiff bushings up front should not cause that drastic of a handling change.