Audi S2 1991 3B rear ARB upgrade - Page 2

Colin Aitchison · 17-07-17, 05:03 PM

I Ben, Sorry back to cars, all the bushes, track rod ends, bottom ball joints and shocks have been replaced at the start of the year and set up correctly, as I have not had the car a long time tire pressures are what they say in the hand book for 205x55x16 tires 34psi all round, I do know my 1985 Ur quattro runs 2 psi less at the front because at the psi in the hand book the center of the tires is run out before the outer edges, but that takes a few year of ownership before you find that out, what psi do you run?

mikes2 · 17-07-17, 06:17 PM

I always ran 36 psi all round in my S2s - that was for ABY engined cars

Ben · 17-07-17, 06:24 PM

Heh, I was taking the p with the, "if it's an english success, then it's english. If it's a scottish/welsh/n irish success, then it's british thing". I am aware it happens, London takes the credit for Manchester stuff all the time.

You say setup correctly? by whom, and by what amount?. Oversteer could be toe out on the rear, and toe in on the front. As the weight shifts onto the front outside wheel in mid corner, it steers more, turning you into oversteer. Swap that to toe out on the front, and it steers you out of the oversteer.

You can check the tracking using a length of string: https://www.youtube.com/watch?v=wjZUu_d08t8

If you stiffen the rear arb, you will get oversteer. But you don't know if it's the arb, or tyres at fault. Maybe swap the tyres around, fronts to rear, etc, and see how it handles then. But you really need four matching tyres, so the conditions affect all the tyres the same. I run 36psi too, in my 80 and 90.

vorsprung durch technik · 17-07-17, 06:31 PM

Agree with Ben get 4 new tyres, preferably some Assymetric 2's

you know your car deserves it.Does an S2 deserve less?

Of course not.

Only then can you compare before and afters.

John. · 17-07-17, 06:39 PM

Quote:

Originally Posted by Ben

..... if it's an english success, then it's english. If it's a scottish/welsh/n irish success, then it's british thing. I am aware it happens, London takes the credit for Manchester stuff all the time.

Respect to you for acknowledging that.

I run 36psi too on the quattros'.

I have whiteline ARB to fit to my CQ and looking forward to the bias to oversteer, it's definitely my favourite way to slip!

Colin Aitchison · 17-07-17, 06:45 PM

Hi Ben, We better say away from the Scottish, English, British thing because we could be going at it for days, I took the car into a place in Bathgate that did 4 wheel alignment and they set it up to the setting they in there system for a 1991 S2, don't get me wrong the car drives and handles well, If can go back to the original quattro when it first came out it had a rear anti roll bar but it was removed in later models due to the rear end of the car snapping away mid corner, I think I need to take your advice and fit all the same tires to all 4 corners, this seams the only way forward to eliminate is it tires or set up.

Colin Aitchison · 17-07-17, 07:04 PM

Tires now on order £187, will be delivered on Wednesday, now down to the garage to find a boost leak that has developed today, watch the 3D printing post I have going just now because I am printing the bungs just now to test for boost leaks.

John. · 17-07-17, 07:56 PM

Quote:

Originally Posted by Colin Aitchison

......I am printing the bungs just now to test for boost leaks.

I'll be up for some pressurisation !!

SE_30 · 17-07-17, 08:49 PM

Just a heads up with regards the "paint" on the Whiteline. I've had one fitted on the rear of my 90 for a few years. The paint isn't that great for good old British weather. Within no time at all is was looking pretty sad for itself.

Colin Aitchison · 26-07-17, 10:50 AM

New Avon tires fitted to wheels and now on car, out for a spin last night in the dry, at normal road speeds the front end is turning in quicker, wet weather to day but to much work to do, may go out latter. manufacture dates on the old tires removed from the car "4409" 44th week of 2009 on rear and "2508" 25th week of 2008 on the front, old tires may have been the problem.

17-07-17, 06:17 PM	#12
mikes2 4 ring whore! Classic Audi Club Member Join Date: Nov 2007 Location: Polmont Posts: 2,617	I always ran 36 psi all round in my S2s - that was for ABY engined cars __________________ 1991 90 quattro 20v sport 1991 90 quattro

17-07-17, 06:24 PM	#13
Ben 4 ring whore! Classic Audi Club Member Join Date: Mar 2008 Location: Stockport Posts: 2,348	Heh, I was taking the p with the, "if it's an english success, then it's english. If it's a scottish/welsh/n irish success, then it's british thing". I am aware it happens, London takes the credit for Manchester stuff all the time. You say setup correctly? by whom, and by what amount?. Oversteer could be toe out on the rear, and toe in on the front. As the weight shifts onto the front outside wheel in mid corner, it steers more, turning you into oversteer. Swap that to toe out on the front, and it steers you out of the oversteer. You can check the tracking using a length of string: https://www.youtube.com/watch?v=wjZUu_d08t8 If you stiffen the rear arb, you will get oversteer. But you don't know if it's the arb, or tyres at fault. Maybe swap the tyres around, fronts to rear, etc, and see how it handles then. But you really need four matching tyres, so the conditions affect all the tyres the same. I run 36psi too, in my 80 and 90. __________________ 1992 80 quattro 20vt Last edited by Ben; 17-07-17 at 06:38 PM.

17-07-17, 08:49 PM	#19
SE_30 Grown up member Classic Audi Club Member Join Date: Apr 2010 Location: Hartlepool - North East England Posts: 909	Just a heads up with regards the "paint" on the Whiteline. I've had one fitted on the rear of my 90 for a few years. The paint isn't that great for good old British weather. Within no time at all is was looking pretty sad for itself. __________________ B2 90 quattro; slightly fettled B2 90 quattro; next project B2 90 quattro; half dead

17-07-17, 05:03 PM	#11
Colin Aitchison Senior Member Classic Audi Club Member Join Date: Dec 2013 Location: Back home in Tillicoultry Posts: 1,308	I Ben, Sorry back to cars, all the bushes, track rod ends, bottom ball joints and shocks have been replaced at the start of the year and set up correctly, as I have not had the car a long time tire pressures are what they say in the hand book for 205x55x16 tires 34psi all round, I do know my 1985 Ur quattro runs 2 psi less at the front because at the psi in the hand book the center of the tires is run out before the outer edges, but that takes a few year of ownership before you find that out, what psi do you run?

17-07-17, 06:31 PM	#14
vorsprung durch technik 4 ring whore! Classic Audi Club Member Join Date: Feb 2014 Location: Near Watford. Posts: 7,753	Agree with Ben get 4 new tyres, preferably some Assymetric 2's you know your car deserves it.Does an S2 deserve less? Of course not. Only then can you compare before and afters.

17-07-17, 06:45 PM	#16
Colin Aitchison Senior Member Classic Audi Club Member Join Date: Dec 2013 Location: Back home in Tillicoultry Posts: 1,308	Hi Ben, We better say away from the Scottish, English, British thing because we could be going at it for days, I took the car into a place in Bathgate that did 4 wheel alignment and they set it up to the setting they in there system for a 1991 S2, don't get me wrong the car drives and handles well, If can go back to the original quattro when it first came out it had a rear anti roll bar but it was removed in later models due to the rear end of the car snapping away mid corner, I think I need to take your advice and fit all the same tires to all 4 corners, this seams the only way forward to eliminate is it tires or set up.

17-07-17, 07:04 PM	#17
Colin Aitchison Senior Member Classic Audi Club Member Join Date: Dec 2013 Location: Back home in Tillicoultry Posts: 1,308	Tires now on order £187, will be delivered on Wednesday, now down to the garage to find a boost leak that has developed today, watch the 3D printing post I have going just now because I am printing the bungs just now to test for boost leaks.

26-07-17, 10:50 AM	#20
Colin Aitchison Senior Member Classic Audi Club Member Join Date: Dec 2013 Location: Back home in Tillicoultry Posts: 1,308	New Avon tires fitted to wheels and now on car, out for a spin last night in the dry, at normal road speeds the front end is turning in quicker, wet weather to day but to much work to do, may go out latter. manufacture dates on the old tires removed from the car "4409" 44th week of 2009 on rear and "2508" 25th week of 2008 on the front, old tires may have been the problem.