It understeers though. I like 225 rears, no wet weather issues and the car doesnt need any more traction in a straightline.

Think the front end is definately where the issue is, its definately less prone to Oversteer than it was before alignment. Ignore the pre settings above as the car was taken to bits due to every bush being seized. I have memory of it running much less rear camber though

 

Si isn't getting oversteer though.

 

The only way to dial out the understeer is to lower your front tyre pressure and increase camber.

 

Yes you will increase tyre wear, but it may help with grip / understter if the front is being overlaoded.

Can't have it all

Think I have near -3 deg front and -2 rear, as Ron says... But pointless for road use.

 

Spot on.

 

A "fast road set up" or track set up would have a slight toe out as this helps turn in , but a trade of is twitchy over rough ground

most rwd have slight toe in and large castor to aid stability, so it's safe for the majority of drivers,

I don't know which machine you have being on so - maybe toe in, very unusual though, in the 38 years i have being in the trade and using a few different rigs they have always being + toe in and - toe out on the front, some very early rigs read the opposite on the rear, but that was years ago,

 

Im of the same school of thought. After lots and lots and lots of testing I definitely prefer less rear camber and more front (currently -2'20f/-1'55r). It makes the on the limit balance a lot better for me.

Typically more toe out on the front will make your turn in great but at the expense of the rear end. Id say the toe out is definetely accelerating your front tyre wear. I wouldn't expect understeer with your setup at all, in fact with 225 rear tyre id expect loads of oversteer! It must be the high -ve rear camber thats keeping it in check. On/beyond the limit it must be snappy though?


What coilovers and ARBs are fitted? Which tyre types and pressures are you using?? What is the usage track/road %age, how 'eager' are you ?

 

Tyres Eagle F1AS2 running 32psi
Standard springs on Koni Yellows running standard height.
Standard ARBs
Spoon braces
Poly bushes with Mugen compliance bushes.
Its my faily drive with rare track usuage and Im more of a Lewis then Jenson driver!

I need to really check the setting currently, the alignment may be out which would explain the US. It doesnt feel snappy.

 

Ok its not too modified. Konis have an adjustment on them i think, what have you got them set to?

Id consider zeroing the front toe and reducing the rear toe to something like 0'10 when you get the Geo rechecked. That'll put you between the uk/standard geo settings.

The front is normally good at holding its alignment. I find my rear toe always moves. I think the solid bushed 'hardrace' toe arms i have don't help with regard to keeping the alignment between checks, not an issue for yourself.

 

They have adjustable damping which I normally have on middle for road and half a turn off stiffest for track, i recently tweaked the front to be slightly stiffer as going from Bridgestones to F1ASs made the turn in a bit softer.

I should stiffen the rear a bit which in theory will help but I cant imagine it being a big effect.

Thanks for the all the ideas so far, Zero front toe and less rear toe is of appeal. Rear tyres wear very evenly at the moment so not sure if anything else needs doing.

Any thoughts on the front castor?