karlooz

i heard f1 drivers prefer a tad bit of understeer for the same reasons you stated. imagine driving an f1 car that has a twichy rear end. one would have to have super human reflexes to catch it and the stamina to do it repeatedly.

Barfly

Forklift, here is a reasonable starting point to combat these states (not create them).

Entry Understeer - Increase the rebound of rear shocks. Decrease the bump of front shocks. Increase the rear brake bias. Brake earlier.

Entry Oversteer - Decrease the rebound of rear shocks. Increase the bump of front shocks. Decrease the rear brake bias.

Exit Understeer - Increase rebound of front shocks. Decrease bump of rear shocks. Stiffen rear springs/anti-roll bar. Soften front springs/anti-roll bar.

Exit Oversteer - Decrease rebound of front shocks. Increase bump of rear shocks. Soften rear springs/anti-roll bar. Stiffen front springs/anti-roll bar.

Flying Finn

Slight oversteer on slow corners and (very) slight understeer on fast corners is what some pros (EDIT: and I) prefer. Reverse is the worst!

DAR951

It's the one I wrote in big letters "SAVE" on, and now can't find... will post if I do...

SundayDriver

I am not a pro but my personal preference is to have oversteer in the slow corners (helps rotation where cars naturally want to understeer) and have slight understeer at high speeds (lets me be more agressive in those corners).

Larry Herman

I would think that is more easily achieved in an aero car like yours. Set the mechanical grip for mild oversteer, and then add enough wing to keep the back in place at higher speeds, si or non?

JimmiLew

Colin,

First off, nice to see you again at Daytona. I started chatting with you then Randy and the synergy guy sauntered up and started chatting with us about this subject, so sorry if my attention drifted toward him!

I was one of those guys talking with Randy. He cleary stated that light understeer allows you to pitch the car in, then chase it with throtlle to balance the car on exit. I tried the sway bar settings he recommended to create this effect in the enduro and picked up a full 2 seconds a lap! The car was much easier to drive (GT3 Cup), and almost all the oversteer and tire spin in the back disappeared.

No, I am not a pro driver, but I will sure listen to one. What he said was spot on and the car control, lap times, and comfort factor proved him right at least for me.

Awesome fun at Daytona! Ya Hoo!

JL

geoffucla

JimmiLew, would you care to share the setup he recommended on your cup? I have a street GT3, but I would assume the swaybar setup would be similar.
I agree with the comments on slight oversteer in slow corners and slight understeer in fast corners, however, currently I have to temper that WOT application because I do tend to have oversteer on track out.
I have the front sway bar set around the middle, and the rear on full soft (running MPSC)--

Geoff.

kingleh

i like a little over steer... that way through the stint if a little understeer comes in.. it will be ok...

if its set up for a lil understeer to begin with.. then it starts to understeer more through the life of the tires... then i got a problem...

genikz

Sorry, not off hand. I'll try to dig it up, but it might take me a while.

Veloce Raptor

Depends on what tires you are running, IMO.

karlooz

....but if you start to overdrive your rears or when the rears begin to fade then you've got, instead of a little oversteer, you've got a lot of oversteer... no?

SundayDriver

Absolutely correct. Though, in addition to that, you can do some shock tuning - you are usually doing major weight transfer for the slow stuff and minor transfer (shock action) for high speed. Thus yoiu can do some of that tuning with shocks. No question though that an aero car gives you another tool for balancing (and screwing up) the handling.

Veloce Raptor

Considering Pobst won today (first time in the car all season) at a very tough, slippery, dirty track, I'd say he was spot-on, as usual.

kingleh

well then dont overdrive the rears...