The standard fix is a bit counter intuitive - pretty stiff front
springs and a fairly large front anti-roll bar. Normally, stiffening
the springs and putting in a stiffer bar will cause the end of the
car you've done that on to have LESS grip, but not the TR-4 with it's
interesting front end geometry. Another thing to try is to adjust
the tire pressures front to rear. I can get my car to push with a 2
psi change in rear tire pressure. Dropping the rear pressure (again,
counter intuitive) will allow the rear of the car to rotate more - at
least that's what it does on mine.
With the Speedsters, I run 25 psi front and 23 rear cold.
In general, understeer is NOT my problem, sometimes it's just the
opposite - I need to bump the rears up a half a PSI to keep from too
much oversteer.
However, I don't run a locked rear end, I run a Detroit
Locker. Under power it's a locked rear but off the power the rear is
open. Locked rears cause initial understeer until you get the rear
sliding a little.
Also, check your brake bias - having more rear brake helps slow the
car and also helps rotate it (to a point). TOO much rear brake makes
it want to go off the road backwards.
- Tony Drews
At 10:38 PM 7/31/2010, MIKE DEWEERD wrote:
>Hello list.
>I'm looking for any advice on how to get my TR4 to corner better. It seems to
>under-steer immensely.
> I am now in the process of changing front springs and shocks because as I
>put heat into the tires, the car would dive down when I turn the wheel to the
>left twice as much as when I turn to the right.(so I figured the left spring
>to be weak). I have no idea of the age of the shocks or springs.
> I find that when entering a tight turn the car will continue straight no
>matter how much I turn the wheel and when the car slows down enough the front
>will then turn quite quickly and I have to counter-steer (straighten) the
>wheel. This makes turns seem jerky and unsafe to other racers.
> I have a welded rear live axle. (which just broke in the last race) and I
>noticed my "new" front Hoosiers are pretty much done after 4 races while the
>back still look new.
> Now perhaps it's just me and I have to learn to drive slower into
> tight turns
>while the MGB's fly past me, or I need to look at something in the front end?
>the car has 1/16 th to 1/8 toe in. the steering rack is tight, it has poly
>bushing through out the front end
>
>Any ideas would be appreciated, Thank you
>Mike
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