Anti roll bar settings for track

[mammoo]

Hi all, I need a bit of help setting up my Toyota MR2 Turbo ('92) for the track. I've got white line adjustable arbs at the front and back, both currently set to "medium" stiffness. I currently have a very planted rear but an understeery front. It will understeer on corner entry and also through the corner if you accelerate out too fast. I've never had any oversteer except from a couple of mistakes.

How should I adjust the arbs to help reduce the understeer? Stiffen up the front? Loosen up the rear?

Thanks

[geeks]

General wisdom would suggest soften the front to reduce understeer but its not as simple as just adjusting the ARB at the front, it could be the ARBs causing understeer, it could be something else! Do you have adjustable dampers? Are your tyres the correct pressure? Are you sure it's understeering and not you? Is it aligned properly? (toe in, out, camber, castor etc) Again are you sure it isn't you?

[mammoo]

Sadly the rest of my setup is fairly stock so no adjustable dampers. It's been 4 wheel setup recently so hopefully that is all correct and I monitor and set the tyre pressures when hot. It could well just be me but the rear has so much grip in comparison, it's never close to losing traction. I figured I might be able to trade some rear grip for front grip by tweaking the arbs.

[Dakkon]

It's a bit of trial and error, but get the front on soft and see how it handles

[CedricN]

How did you set the geo? Is it a track setup? Start by stiffening the rear, it might feel a tad less responsive at the front but should get you a better balance once the car is set in the corner.

[Steve H]

Yep, all other things being as they should I'd stiffen the rear bar but the real answer is try a fairly big adjustment and see what it does .

[rallycross]

I had these on my mk2 MR2 racing car if they are the same 3 position adjusters then ignore the hardest setting its far too stiff so just play around with medium and soft.

I think my car was best in the dry with soft rear and medium front ( it was a long time ago so it may have been the other way round?!).

That was with standard Bilstein shocks from a turbo and Toyo888 15 inch tyres, it was interesting just how much of a difference it made to the handling.

You should definitely be getting some oversteer but on these things the trick is to keep that to a minimum or you will be spinning off the track before you have time to shout WTF is it doing that for?

[mammoo]

Thanks for all the replies guys - I'll try softening the front to start with to see how that helps.

[Bright Halo]

Don't forget you can set one side hard and one side medium and that will give you an actual setting half way between the two.