handling issues, seems to go everywhere at high speeds

it maybe a common issue with the Supra, just wonder how everyone elses handles.

my car is BPU, 380BHP.

its on 9.5J rear wheels, 8J fronts. tires all good, and are 240/45/17 front, a little wider on the back 265/45/17 if i remember.

the car has front & rear strut brace, and also a body brace (by rear seat)

its only bilstein shocks & springs, rarther low tbh

now the power steering is very very sharp, only have to move lightly and the car will turn.

it drives in a straight line, but when your giving it a bit, at say anything over 60/70 it seems to wonder over the road a bit??

dont know if its the condition of the roads? or if the car is need of some coilovers??

anyone else have this issue??

You say your tyres are good, but are they a decent brand?

My car feels totally different with 4 brand new tyre on.

not sure,

maybe the tire pressures are an issue?

or maybe its as the car is so rigid with the struts and current suspension, that any glitch in the road will be picked up?

Coilovers will give you a harsh ride generally, you have the accepted best suspension set up. Crap tyres may be your problem. What make are they?

A geo set up will improve a lot of issues also.

hmm yea, will let you know the make of them later....

im just comparing it to my Fairlady Z which i still have,

thats on shit tires, but Tein Coilovers, and that handles superb..

get a geo done, your alignments must be out.

ok,

is that the same as the tracking or isit different?

ok,

 

 

is that the same as the tracking or isit different?

Geo goes much further than tracking, adjusting where necessary any castor/camber movements over the years.

If you've got crap tyres change them-then get a full geo done.

From past posts it apparently transforms the driving experience.

I plan to get it done when I have changed my suspension

Tyre pressures/tyres.

Get alignment done and suspension components checked for wear.

Could also be a dodgy speedo conversion affecting the power steering.

Tyre pressures/tyres.

 

Get alignment done and suspension components checked for wear.

 

Could also be a dodgy speedo conversion affecting the power steering.

ok thanks.

how much does the geo usually cost?

im going to not asume its the steering, as im holding the wheel straight and not moving it.

the way i can describe how the car is behaving, as asif its bouncing and tending to wander left & right

The 1st thing to do is check your tyre pressures, then get the car on a ramp so you can check the suspension for play in any of the bushes, track arm joints, ball joints or even wheel bearings and also check for possible leaking or blown dampers.

A full geometry set up cost will depend where you take it, anything from £80 upwards

I have a similar thing(I have brand new bridgestones all round) on stock suspension, I notice it most on the motorway, If I have it in 6th and put my foot down the car drifts to the right, then when I let off it starts coming back to the left, I've always assumed it's the tracking, just havn't really had a chance to sort it yet.

Your front tyres may be one size too wide for the wheels?

240's sound wide for 8J rims.

I checked on 'Tyre Bible' but the site no longer has the wheel/tyre width calculator.

Suggest you research and confirm.

240 should be fine on an 8" rim, think the stock size is 235 so doubt thats an issue to be honest.

handling issues, seems to go everywhere at high speeds...

anyone else have this issue??

Yes, I go everywhere at high speed.. can someone help?

Didn't know you could get 240's?

235 or 245.

Didn't know you could get 240's?

 

235 or 245.

Yes i think your right, there not on the tyre size calculator i use anyway but if you can there not too big as 245's are fine

on an 8" rim

http://www.alloywheels.com/tyrecalc.asp

Check you have the correct tyre pressure too.

seems to be getting worse last nite, maybe thatl help me pin point the problem tho.

i had to stop and check the wheels were all tight last nite, thats what it felt, bit wobbly sorta thing. (1 of the wheels wernt very tight at all tho)

in second gear, if you get it on boost, the back end is sorta coming out a touch, then shooting the car forward, slightly diagonal? (in the dry now, never done that before)

going to book it in garage,

seems to be getting worse last nite, maybe thatl help me pin point the problem tho.

 

 

i had to stop and check the wheels were all tight last nite, thats what it felt, bit wobbly sorta thing. (1 of the wheels wernt very tight at all tho)

 

 

in second gear, if you get it on boost, the back end is sorta coming out a touch, then shooting the car forward, slightly diagonal? (in the dry now, never done that before)

 

going to book it in garage,

Worn bushes i bet.

Mine was doing the same thing a little while back, checked the geo and all was good, we could not find any play in anything, in the end i changed everyting on the rear end to brand new oem and alls perfect once again, not cheap a cheap fix:(

in second gear, if you get it on boost, the back end is sorta coming out a touch, then shooting the car forward, slightly diagonal? (in the dry now, never done that before)

I have read before (but can't find the thread right now) that worn diff mounts can give you perculiar rear handling issues, especially under load

...or was I just dreaming this?

Worn bushes i bet.

 

Mine was doing the same thing a little while back, checked the geo and all was good, we could not find any play in anything, in the end i changed everything on the rear end to brand new oem and alls perfect once again, not cheap a cheap fix:(

i have the exact same problem and i'm going with worn bushes or top mounts just going full coilover instead of bilsteins and springs

i have the exact same problem and i'm going with worn bushes or top mounts just going full coilover instead of bilsteins and springs

I will be supprised if its top mounts tbh mate.

One word, dont fit powerflex bushes, they are garbage, go oem.

Look at your tyre wear, is it even or is one side (or the middle) wearing faster than the rest? My money is on several components being past their best, and the geo being miles out.

And a little bit of tramlining, possibly?