That's a tidy setup

recaro speed seats and momo course steering wheel too.....do they count?

They're more form over function so no not really

another thing thats slightly annoying is i plumped for more camber in the straight ahead (1 degree) mainly to weight up the steering...which it has done but it definitely has made it tram-line/torque steer more. might need to find a balance maybe 0.8 of a degree?

do people normally run 17x7j? is there any point in going for 7.5j? what tyre would you run on 7.5j?
i know 215/40/17 is the best size but there is more choice in 215/45/17 like the f1 assymetric 2 and the conti sportcontact 5 will there be any handling differences?

stops my ass from sliding which is functional is it not?

215/45 will give you a slightly taller sidewall, so there will be more tyre roll (for the same make of tyre)

Also, I believe several Coupe owners have noted wheelarch liner rubbing with 215/45 17

As for camber - I also run 1 degree negative and I have almost zero torquesteer

Awaiting reply, thanks Nigel

me too!

yes, its weird i would not expect it to have made the difference it has?

jon - are your increased-caster topmounts adjustable? - if so, it might be worth going back towards standard

no there fixed...might see if 0.8 is a happy medium between steering weight and tram-lining.

You shouldn't be getting torque steer or tramlining at -1 deg camber! Who's setting it up for you?

the place barbz takes its to...they have done my geo about six times.

Just resurrecting this thread - I drove Jon's car today and I'm stumped.

Traffic and respect for Jon as a passenger meant that I didn't really get to push it, but I got a bit of a feel for what Jon is trying to diagnose - when the car is pitched into a turn, it feels like the rear end steps out very slightly - almost as if it has passive rear wheel steering.

It never feels like it's going to bite, it's just that there's a slight delay between the front end turning and the back end following. Very unusual and it would be only too easy to blame the tyres (feels like it's rolling on its sidewalls at the rear)

I have to admit to being stumped - my only remaining theory is that the front end of Jon's car is SO pointy that the rear simply cannot react at the same rate. Jon's is quite possibly the fastest-steering Coupe I've ever driven, although I'd be willing to bet that Sparco's is probably a bit edgier.

My only recommendations so far are:-

1) Try a different set of tyres, but I think that this will merely eliminate tyres as the source of the issue. The Falkens seems pretty grippy although the sidewalls do have some movement.

2) Dial out some of the camber at the front in an attempt to soften the response of the front end, giving the rear a chance to react at the same rate.

3) Soften the spring rate at the rear - it's already pretty hard and it contributes to the pointy front end

The mystery continues....

Jon,if you get a chance nip the car over and i will have a good look over it on the ramp.
Quite keen to see whats causing this as my sprintey is also a little lively to say the least at the back end.Great fun around Donington on sunday but a little unnerving on the road.

Thanks again to nigel for taking the time to drive my car...it was nice to meet you especially in the name of science!

i have run less camber (0.5 degrees) in the straight ahead and that made no difference to how the back end felt,but it did tramline less and the steering was a bit lighter.

at one point when i was waiting for my springs to be made i did have 350lb springs on the front and std springs on the rear,but i did not drive the car hard in this state and i suppose i was not looking for it to cure my symptoms at the time, i only noticed more roll at the back....i could try this again!

i'm still leaning towards the tyre's but not dismissing the spring bias has nothing to do with it, in-fact it might be a combination of both?3rd post down explains my symptoms spot on!

johnny i would love to "nip" up and see you but your hardly round the corner! but you never know might be worth a trip!
out of interest what tyres are you running on your sprinty?

If you want to pop over to Shalford for a couple of hours next weekend, you can try my wheels on your car, 17" 7.5 on a Toyo 215/40/17

thanks, i might just take you up on this i will pm you

Toyo T1r's on the sprintey and on my black coupe.
Folk come from France to see me and Scotland.So your only around the corner

ok maybe i'm just lazy

Just to bump this back up, Jon will be popping over to mine on Saturday to try my wheels on the back to see if it is the tyre's or not that is the issue

hopefully a mini comparison between the bc and gaz too! im interested on how alexis feels his car now drives with equal front and rear spring rates.