Almost sold my Tuscan due to poor handling! Fixed for £20!

[Lucozade]

GT TVR said:

How does this work with the fact that on an Tuscan S 255 fronts are considered too wide (225 are supposed to be a lot better)?

I'm interested to know what difference this would make to a Tuscan Mk3 where I've had 255s fitted all round.

[Jonny TVR]

This is all very interesting.

I have a Mk2 Tuscan S. Can't remember the tyre size but these sound great

[Robertjp]

I have just ordered a set, should have them fitted at the weekend in time for my trip to Goodwood so i will report back!

[Robscim]

Sorry to butt in, but does this apply to those of us with Cerberas? I only ask as we have the Tuscan wheels too!

Cheers

Rob

[Jonny TVR]

I've just bought some as well so will fit at the weekend and report back (Tuscan 2 S)

[Full SP]

Regarding Mk2 and Mk3 Tuscan I don't know 100% how effective the spacer solution is. Once Nikolai re-engineered the Mk2 onwards Tuscan I lost track of all the changes relating to steering, wishbones, castor angles and so on. It is likely that the "track narrowing" error made by TVR was not removed in which case the spacer solution will work just as well and for the same reasons. We have done work with differing wheels with differing offsets that seemed to prove this, but since I don't have all of the technical data to support this claim I'm a little more cautious

The tyre size (whether 225, 235 or 255) does not affect whether the spacer solution is effective. The tyre sizes will certainly have an impact on how the car steers/ feels generally but this should be considered as a separate issue.

[Full SP]

Robscim said:

Sorry to butt in, but does this apply to those of us with Cerberas? I only ask as we have the Tuscan wheels too!

Cheers

Rob

It sort of does, but Cerberas don't have as much clearance around the arches so that when you fit the spacers the wheels start sticking out of the arches. The problem with Cerberas also is that the 225/35 tyre is really a bit too narrow for th 8.5x18 front wheel so the tyre is too stretched and consequently doesn't operate as it should. It won't come as any surprise to you I'm sure that the SP12 wheels deal with both of these issues simultatneously... as well as being 3kg lighter and much stronger (Same story with Tamora and T350)

[dvs_dave]

Will this reduce/eliminate what many perhaps incorrectly perceive to be bump steer? I know that the Sagaris has revised steering arms that bring the track-rod into a more horizontal position, I presume with a view to reducing bump steer. The Sagaris though uses the same wheels/brakes/hubs as the Tuscan so in theory it should suffer from the same offset issues?

[ochten]

Is it possible to make a picture of the actual situation with the spacers on?
It would help the discussion I think.

[Defcon5]

Surely widening the track by 6mm cant make that much difference?

[Robertjp]

Defcon5 said:

Surely widening the track by 6mm cant make that much difference?

When you consider the difference a good geo set-up can make i wouldnt at all surprised what 6mm track difference can do.

But, i will wait and see, as i was told on the phone in terms of bang for buck performance mods this is top of the list, it really does make a difference, so im looking foward to trying it out!

edited to say that for reference i have 245 40 18's on back and 235 40 18's on front

Edited by Robertjp on Monday 21st June 20:32

[Konrod]

Rens, I called him this morning, and I have 225s on the front. Confirmed that the 3mm spacers are the correct ones, and you wouldn't need new studs. Mine are ordered.

J

[Full SP]

dvs_dave said:

Will this reduce/eliminate what many perhaps incorrectly perceive to be bump steer? I know that the Sagaris has revised steering arms that bring the track-rod into a more horizontal position, I presume with a view to reducing bump steer. The Sagaris though uses the same wheels/brakes/hubs as the Tuscan so in theory it should suffer from the same offset issues?

The Sagaris has a much wider track anyway and a different rack and PAS arrangement so it's not the same set-up. Crucially, the Sagaris was engineered with 18" Spiders.

Defcon5 said:

Surely widening the track by 6mm cant make that much difference?

Are you saying that Martin is telling fibs??
It's not a big amount granted, but it does make a significant difference.

[Steve Devaney]

I spent money on new 18'' Spiders, Goodyear Assym's (245/40 R, 235/40 F), Racing Reds and Geo set-up and only noticed a small difference - still wanders like a Chelsea footballer on tour.

.........So these wee jobs could be the answer to my ever decreasing bank balance!?

[rens914]

Konrod said:

Rens, I called him this morning, and I have 225s on the front. Confirmed that the 3mm spacers are the correct ones, and you wouldn't need new studs. Mine are ordered.

J

orderd some too
greets rens

[softtop]

Steve Devaney said:

I spent money on new 18'' Spiders, Goodyear Assym's (245/40 R, 235/40 F), Racing Reds and Geo set-up and only noticed a small difference - still wanders like a Chelsea footballer on tour.

+1

[MPETT]

Defcon5 said:

Surely widening the track by 6mm cant make that much difference?

For the doubters out there, why not come along to ROAR 2010 this weekend and try it out for yourself. www.TVRRoar.co.uk

If you ask very nicely, I might let you try my totaly standard Tuscan mk1! Or you could buy a set, fit them and go for a blatt in the peaks?

[dvs_dave]

Looked into this a bit further and from what I've ascertained, these spacers essentially alter the front "axle" scrub radius. I don't know what the standard set-up is but I imagine it runs too much negative scrub, hence the overly twitchy feel of the front end.

Widening the track will bring the front end back into the scrub radius sweet-spot which will greatly improve front end stability, not only over bumps, but also under braking which can only be a good thing.

I've ordred a pair for my Mk.1 S and will be very interested to see the difference it makes. I have an otherwise very well set-up car (nitrons, full and recent cornerweight and geo re-tune) that is stable at high speeds and is not all over the place on bumpy back roads.

Is there a maximum recommended camber angle for use with these spacers as it's a fundamental of scrub radius?

Edited by dvs_dave on Tuesday 22 June 17:01

[Lucozade]

Full SP said:

Regarding Mk2 and Mk3 Tuscan I don't know 100% how effective the spacer solution is. Once Nikolai re-engineered the Mk2 onwards Tuscan I lost track of all the changes relating to steering, wishbones, castor angles and so on. It is likely that the "track narrowing" error made by TVR was not removed in which case the spacer solution will work just as well and for the same reasons. We have done work with differing wheels with differing offsets that seemed to prove this, but since I don't have all of the technical data to support this claim I'm a little more cautious

The tyre size (whether 225, 235 or 255) does not affect whether the spacer solution is effective. The tyre sizes will certainly have an impact on how the car steers/ feels generally but this should be considered as a separate issue.

Well I'm in Milton Keynes and happy to try the spacer solution on my Mk3 if you want to.

[TOV!E]

Lucozade said:

GT TVR said:

How does this work with the fact that on an Tuscan S 255 fronts are considered too wide (225 are supposed to be a lot better)?

I'm interested to know what difference this would make to a Tuscan Mk3 where I've had 255s fitted all round.

What is a MK3.????????????????????????????????????????????