reducing oversteer

[butters]

after fitting my LSD i have found the rear end a lot more twitchy and i'm interested in reducing this. (but don't want an understeering pig)

current setup:

teins: front 12 rear 10
white line adj sways: both middle setting
allignment:
- front castor 5
- front camber -1.2
- rear camber -1.2
- rear toe in 0.5mm


just after some opinion for my next wheel alignment (fiddled with steering rack)

should i increase rear camber to -1.5
or increase rear toe?

i had both sways on hard for a while but found it too stiff and think it was limiting the suspensions effectiveness over bumps. i doubt i can go soft on the front (looks like it will hit shock) maybe the rear. they seem very difficult to adjust without adjustable links.

should i leave the alignment as is and just try setting the rear bar to soft?

[Sheck]

Try playing with tyre pressures!! Trust me when i say this, if i had known this on sat arvo i prolly wouldnt of put my car into a wall on sat nite. Took me half the (drift) comp to get the car acting the way i wanted it too. I played with shock settings for a while but found that tyre pressure had the greatest effect on rear grip. I went from a wall hitting 32psi to a happily sliding but still grippy 38psi in the rear tyres.

Dave

[Babalouie]

NAs toe out under power, so the static toe in is to compensate for that. I'm not sure if 0.5 is enough toe in, I run 2mm. Also I run more neg camber at the back than at the front, 1.5 vs 1.2deg.

Also....for track, I run my Teins with a differential of 4 clicks, 2 was too taily....and, when I swapped over to Teins, I found that the whiteline rear swaybar was overkill....swapping the stock rear bar back made it much more neutral.

So....it looks like you have a real dorifto setup there

[StanTheMan]

Tyres would be my first choice too. You can also play around with the shock stiffness a little. Increase stiffness in the front a little.

A lot of the allignment experts here on this forum say the front needs to have more camber than the rear in the MX5. Depending on your driving try -1.5 front & back.

You LSD making your rear end a little twitchy. What type of tyres are you running.// Are they old? Good chance ther are crappy. I found my LSD made me understeer through corners except in the wet. But i run RT 615's & they stick like .....
I also run -2.25 camber front -2.1 at the rear & still manage to wear the outside quicker. But it all depends on your driving style

[zoomzoom]

You will be amazed at how much the tyre pressures will affect turn in and oversteer, if you are oversteering I would suggest less in the rear. I run 205/50R15 and run at about F-32psi R 30psi for track to prevent rollover and less for road, and then less again if I am doing very low speed motorkhana type events. I usually have about 2psi more in the front and that is all cold pressures. It will be different for different tyres and sizes so have a play.

Also, try not to bury the right foot too much

Tim

[lil_mike]

check all the things that every one has mentioned, but also, try to work on your throttle control. having gone from an open centre, to a clutch pack lsd, i can understand what your saying. maybe have a look at your driving style to see how you are accelerating in and out of corners. you may need to just ease off a little and then smooth it on. i found this sort of helped a little in keeping the rear on mine straight. thats my experiences anyway

[Benny]

Generally speaking, stiffening up the front end will decrease oversteer - or put another way, increase understeer.
Stiffening the back makes it more taily.

This applies to whether you stiffen up by adjusting the shocks/springs/swaybar or just the air pressure in the tyres.

As someone else said, larger rear bars may feel good on the street at 7/10's, but will make the car oversteer a lot at track type speeds.
Try disconnecting the rear bar, or at least softening it, then try and see how the car handles.

[CT]

Front bar full hard and either a) rear bar full soft or b)stick a standard rear sway on it. The wheel alignment will make dick all difference if your bar balance is wrong. Fix the bar balance first.

[Juffa]

Tein Flex on mine, with hard springs. I have an adjustable whiteline front bar set to soft (Until I get adjustable end links) I ended up removing the rear sway bar to settle the back end.

J

[GP]

More Rear toe in will definitely reduce oversteer but only as a last resort.