Improved Handling
Discussion
I'm trying to improve the handling of my Tuscan (unofficial mark 3) which has 255 wheels and tyres all round with spacers fitted to the front.
I was speaking to a fella at Chatsworth last weekend who has fitted the TVR Power performance 19" rims (see link: http://www.tvrpower.co.uk/store/slug/powers-perfor... )to his Tuscan, which is the same model as mine, they are 235 front and 265 rear with lower profile tyres so as not to effect the gearing, and he said they have greatly improved the handling and reduced the tramlining and bump steer, and no longer needs his spacers.
Has anyone else had this conversion done, and if so, has it greatly improved the handling?
I'm also aware of the Act SP12 wheels.
I was speaking to a fella at Chatsworth last weekend who has fitted the TVR Power performance 19" rims (see link: http://www.tvrpower.co.uk/store/slug/powers-perfor... )to his Tuscan, which is the same model as mine, they are 235 front and 265 rear with lower profile tyres so as not to effect the gearing, and he said they have greatly improved the handling and reduced the tramlining and bump steer, and no longer needs his spacers.
Has anyone else had this conversion done, and if so, has it greatly improved the handling?
I'm also aware of the Act SP12 wheels.
maybe a dumb suggestion but did you check the suspension alignment already? Just mentioning this point as I have done it myself on a Tuscan I bought about a week ago and fond the setting to miiiiiils off although I am sure it has been driven like this for years. Doing the proper alignment now made a night to day change.
Me again 
Having driven that other Tuscan that was for sale at Fernies... that handled really well, with a nice ride quality too. No noticeable bump steer, and the steering weight/feel was one of the best cars i've ever driven.... so I would say it's totally possible to get them set up well without resorting to changing wheel size.
I've gone down to 225/40 front tyres, partly on advice from various places, and partly as they were cheaper
With the full geo setup and the bump steer on mine isn't bad at all. Yes it is there, but I feel much more confident pushing on in the Tuscan than I did in the Chim. I tried the spacers and to be honest it felt worse... so have taken them off.
I would get a full checkover of the geo before making any hasty decisions. Once persons "perfect" setup might not suit your driving style or preference. Maybe see if you can book some time somewhere that can set it up, let you try and then make a few tweaks to see if they can improve it?
Having driven that other Tuscan that was for sale at Fernies... that handled really well, with a nice ride quality too. No noticeable bump steer, and the steering weight/feel was one of the best cars i've ever driven.... so I would say it's totally possible to get them set up well without resorting to changing wheel size.
I've gone down to 225/40 front tyres, partly on advice from various places, and partly as they were cheaper
With the full geo setup and the bump steer on mine isn't bad at all. Yes it is there, but I feel much more confident pushing on in the Tuscan than I did in the Chim. I tried the spacers and to be honest it felt worse... so have taken them off.
I would get a full checkover of the geo before making any hasty decisions. Once persons "perfect" setup might not suit your driving style or preference. Maybe see if you can book some time somewhere that can set it up, let you try and then make a few tweaks to see if they can improve it?
Daston said:
What profile is your fronts?
Mine used to be 235/30/18 and used to bump steer all over the place. I then changed them to 235/35/18 and the difference is massive, much easier to drive down B roads and dont have to
fight it at all. Next will be the spacers
Hi I'm looking to change my front 255 down to 335 what is the difference in handling between the 30 and 35 profile and what make tyre did you go for?Mine used to be 235/30/18 and used to bump steer all over the place. I then changed them to 235/35/18 and the difference is massive, much easier to drive down B roads and dont have to
fight it at all. Next will be the spacers
andrewturner38 said:
Daston said:
What profile is your fronts?
Mine used to be 235/30/18 and used to bump steer all over the place. I then changed them to 235/35/18 and the difference is massive, much easier to drive down B roads and dont have to
fight it at all. Next will be the spacers
Hi I'm looking to change my front 255 down to 335 what is the difference in handling between the 30 and 35 profile and what make tyre did you go for?Mine used to be 235/30/18 and used to bump steer all over the place. I then changed them to 235/35/18 and the difference is massive, much easier to drive down B roads and dont have to
fight it at all. Next will be the spacers
Basil Brush said:
andrewturner38 said:
Daston said:
What profile is your fronts?
Mine used to be 235/30/18 and used to bump steer all over the place. I then changed them to 235/35/18 and the difference is massive, much easier to drive down B roads and dont have to
fight it at all. Next will be the spacers
Hi I'm looking to change my front 255 down to 335 what is the difference in handling between the 30 and 35 profile and what make tyre did you go for?Mine used to be 235/30/18 and used to bump steer all over the place. I then changed them to 235/35/18 and the difference is massive, much easier to drive down B roads and dont have to
fight it at all. Next will be the spacers
I've spoken to Dom at TVR Power about this; he was extremely helpful, also spoken to several other people. It seems that every car is different in its handling characteristics, and wheel/tyre and geo set-ups can also be very different from car to car.
As an ex-racing driver, I do drive my car hard at times, and I'm very particular about the way my car handles and its geo set-up, wheel/tyre sizes etc, trying to develop the prefect handling to suit my style of driving.
I've decided to keep the 18" 255 rims, and try different geo set-ups, and continue to play with tyre pressures until I find the optimum set-up. There's no point in changing the shockers yet, as the standard ones with only 15k miles, there's nothing wrong with them.
My TVR specialist has tested my car and has said it handles a lot better than most other mk2 Tuscans. Don't get me wrong, it handles quite well, it's just me trying to strive for prefection. I will continue my task until it's just right.
As an ex-racing driver, I do drive my car hard at times, and I'm very particular about the way my car handles and its geo set-up, wheel/tyre sizes etc, trying to develop the prefect handling to suit my style of driving.
I've decided to keep the 18" 255 rims, and try different geo set-ups, and continue to play with tyre pressures until I find the optimum set-up. There's no point in changing the shockers yet, as the standard ones with only 15k miles, there's nothing wrong with them.
My TVR specialist has tested my car and has said it handles a lot better than most other mk2 Tuscans. Don't get me wrong, it handles quite well, it's just me trying to strive for prefection. I will continue my task until it's just right.
GT TVR said:
Nitrons (don't set them too hard)
Eibach springs 400 rear, 325 front (!)
raised steering rack
max castor front, bit more camber on rear
Toyo R1R's 225/40 front, 255/35 rear
sorted, brilliant !
Are you sure those spring rates are the right wa round as i would imagine softer on the back would be better?Eibach springs 400 rear, 325 front (!)
raised steering rack
max castor front, bit more camber on rear
Toyo R1R's 225/40 front, 255/35 rear
sorted, brilliant !
Going to go through this with mine when its back. It has gaz gold pro's with unknown rates, good but unknown geometry (car tracks straight). front spacers but not the right tyre sizes 225/40 front and 245/40 rear so ill change those too.
Turn in is awesome, but theres too much rear end unstability imo, hitting a bump will spin the wheels and i imagine thw whole car if full power was down and the front wheels not perfectly straight.
To me it just feels the the rear is too stiff, so softening up the shocks is my first call, then onto some revised geo and tyres.
Does anyone have the geometry for an aggresive fast road car, not overly bothered about tyre wear (within reason no 4 deg neg all round
)m3jappa said:
Are you sure those spring rates are the right wa round as i would imagine softer on the back would be better?
Going to go through this with mine when its back. It has gaz gold pro's with unknown rates, good but unknown geometry (car tracks straight). front spacers but not the right tyre sizes 225/40 front and 245/40 rear so ill change those too.
Turn in is awesome, but theres too much rear end unstability imo, hitting a bump will spin the wheels and i imagine thw whole car if full power was down and the front wheels not perfectly straight.
To me it just feels the the rear is too stiff, so softening up the shocks is my first call, then onto some revised geo and tyres.
Does anyone have the geometry for an aggresive fast road car, not overly bothered about tyre wear (within reason no 4 deg neg all round )
Springs: yes, firmer on the rear. On a Tuscan all the weight is behind the front axle (with a big *ss sticking out) so this will help to stabilize it. And set the dampers softer so it absorbs the bumps in stead of jumping off them.Going to go through this with mine when its back. It has gaz gold pro's with unknown rates, good but unknown geometry (car tracks straight). front spacers but not the right tyre sizes 225/40 front and 245/40 rear so ill change those too.
Turn in is awesome, but theres too much rear end unstability imo, hitting a bump will spin the wheels and i imagine thw whole car if full power was down and the front wheels not perfectly straight.
To me it just feels the the rear is too stiff, so softening up the shocks is my first call, then onto some revised geo and tyres.
Does anyone have the geometry for an aggresive fast road car, not overly bothered about tyre wear (within reason no 4 deg neg all round
)Tyres: if you have 225/40 and 245/40 that's OK, don't change them.
Geo:
FRONT
toe-in per wheel-4 min
toe-in total -8 min
camber -1
REAR
toe-in per wheel-12 min
toe-in total -24 min
camber -1,5
Gassing Station | Tuscan | Top of Page | What's New | My Stuff