I'm off to rockingham for my 2nd track day and was wondering if anyone has any idea of how to scrub off some of the under steer that I experienced on my 1st track day!!!

I haven't got time to go to Power station for the bump steer etc!

I have a STI RA and even with the diff. fully unlock I found it very hard to get any over steer........which is more fun IMHO!

All sensible suggestions would be much appreciated.

Dom.

 

You could "play" with the tyre pressures (more in the rear, less in the front) and if your not running slicks put the worst treaded tyres on the rear which may help the rear end break away.

 

don't pile into the corners and expect the front tyres to do all the work.

I think john felsted is your man on this though, I'm not sure about running the diff fully open, the 'term' open doesn't sound right, but I'm no DCCD expert.

Paul

 

I think Power Engineering in Uxbridge can do something with the Geometry. Might be worth a try.

 

I'm going to Feltham tyres to have the laser aligment done, they are also going to set the camber to the settings recommended by Claudius - 1.5 degree front camber.
0.5 rear camber.
Zero toe all round.

Does this sound right?????

Dom.

 

If you want some more oversteer higher pressure to the fronts (3-4 psi more of the rears) max camber - as mentioned - front and some toe out rear (<10-15 minutes) help.
You can't adjust the camber rear without new "eccentric" bolts.
JIM

 

Sounds great!

Seriously, if your rear grips too much because you have too much camber in the rear, the front will lose grip sooner, so more in the front is definitely the way to go.

Toe out in the rear is good, too, but watch it, it could surprise you!

 

Whatever you do to help at Rockingham Dom, the only real way is to get the bumpsteer removed. Anything else you do will only be a compromise to get away from the bad effects caused by the bumpsteer. Rather than improve the grip at the front,you will be destroying grip at the rear in an effort to balance the car. That can only increase your lap times.

Les

 

Went to Feltham and they were very quick and professional. They said that there is no camber adjustment on the rear wheels so they set the front to 1.5 degrees and zero'ed the toe in or out!!

I'm going to run with 35psi in the fronts and 40psi in the rears, does this sound ok?

Think of me tomorrow as I'm flooring it on the banking chasing my bro. in his 390 Tuscan!

Dom.

 

40 may be a bit much, watch it!

If it still understeers, try a little less in the front

 

Dom

If you see this, just interested in how Rockingham went. Hope you kept up with your Bro.

Les

 

dominicm,

How much did it cost to get the work done at Feltham Tyres. They're quite close to where I work so I might have mine done there if they are reasonable on price...