Understeer appeared from no where??

[VeeDub Geezer 0]

just recently Jade's C has been suffering from a lot of understeer. We havent changed a thing!

 

The car is a '92 2.0 16v, -35mm Boge springs, KYB uprated shocks, 7x16 OZ Titans, 195/45 16 tyres.

 

Tracking was done not so long ago as the track rod arms were changed.

 

is it worth getting the geometry re-done (this was done mid-'06) or would it be a waste of £65?

 

it started to understeer a little while ago so we changed from the budgets that were on the front to some Dunlop SP Sport tyres which helped for about a week but now its started doing it again

 

we also have noticed its getting harder to put the power (all 136bhp of it :oops: ) down

 

anyone have any ideas or experiance with something like this?

 

we were told last year the rear bushes were starting to deteriorate (sp)

 

could this cause this??

 

help cos its gettin embarassing spinning the wheels when pulling away quickly.. :mad:

[ben16v 0]

could it be anything to do with tyre pressures and temperature??

[VeeDub Geezer 0]

sorry i knew there was something i forget to mention.

 

we run the fronts at 34psi and the rears at 36psi and they are checked almost weekly...

[Kevin Bacon 5]

Rears at 36psi? The back tyres should be lower pressure than the fronts, and damper and spring rates softer too.....otherwise the back could swing round on you.

 

What are the inside and outside edges of the tyres like? Uniform wear across both fronts? If not, there's your answer, geometry.

 

Failing that, could be knackered shox (difficult to diagnose with uprated springs using the bounce test), worn front bushes....anything.

[VeeDub Geezer 0]

thats just the way she feels comfortable driving. we did run 36 front and back but there was no traction at all..

 

there was a little uneven wear on the budgets but as soon as we fitted the Dunlops the tracking was done.

[dr_mat 0]

Pressures seem very high for a 2.0 ... Higher tyre pressure than you need will cause a loss of grip.

Note also that the roads have been quite seriously greasy for a few weeks. And also that there's a load of white slippy stuff fell out the sky ..

[Kevin Bacon 5]

Exactly, but if he's "comfortable" with that I'm keeping well out of it.....

[Nuggit 0]

Agree with the 2L comment...

 

I'd try dropping the pressures to 30psi all round and see how you get on.

[VeeDub Geezer 0]

the problem is its my gf's car and her parents live out in a little village where the council forgot there were roads...

 

shes been through more tyres than she cares to remember due to pot holes...

 

the problem is the age old "do you run low profile tyres on bigger wheels at the same pressure as the standard wheels" question

 

no one really seem to know!