IRS rear camber with 944 arms and uniball system

[4agedub]

I'm slowly collecting parts for my 1303 build, this week I received the uni-ball system that eliminates the torsion bars and the 944 s2 trailing arms.

Does anyone know how much camber is obtainable with the inner eccentric bolt adjustment?

[helowrench]

IIRC 2.5-3.5 negative is achievable.

[helowrench]

IIRC 2.5-3.5 negative is achievable.
For more than that, you need the eccentric inner modification to the diagonal arm.
Diagram for basic adjustments http://www.924.org/techsection/techpics ... strear.gif

[4agedub]

Thanks, 2,5' should be more than enough. We are planning on running 10" wide rubber on the car, so even with little camber is should still be ok.

[fabo]

Thanks, 2,5' should be more than enough. We are planning on running 10" wide rubber on the car, so even with little camber is should still be ok.

Can't wait to see this:-)

[buildabiggerboxer]

Thanks, 2,5' should be more than enough. We are planning on running 10" wide rubber on the car, so even with little camber is should still be ok.

This is dead right, I only run 7.5" soft compound tyres and cooked up the inner edges on my low set car, it's possible to have too much adjustability and need time and testing and a set of 'corner men' to keep on top of it all, I run steel arms and flipped them to reduce camber which cured inner edge o/heating, it took a lot of track time to re adjust to the new set up, i settled on 1/2 degree rear toe in and don't play with the mechanical angles now I'm happy with the rear and it's smooth transition, it's also fabulous in the frequent rain we get in UK, I just use tyre pressures to 'read' and switch on the tyres, the hard work is at the front and getting decent core temperature from the brakes and switching on the tyres.

[4agedub]

Thanks, 2,5' should be more than enough. We are planning on running 10" wide rubber on the car, so even with little camber is should still be ok.

This is dead right, I only run 7.5" soft compound tyres and cooked up the inner edges on my low set car, it's possible to have too much adjustability and need time and testing and a set of 'corner men' to keep on top of it all, I run steel arms and flipped them to reduce camber which cured inner edge o/heating, it took a lot of track time to re adjust to the new set up, i settled on 1/2 degree rear toe in and don't play with the mechanical angles now I'm happy with the rear and it's smooth transition, it's also fabulous in the frequent rain we get in UK, I just use tyre pressures to 'read' and switch on the tyres, the hard work is at the front and getting decent core temperature from the brakes and switching on the tyres.

Do you run an open or LS differential?

[buildabiggerboxer]

Hi mate, love that other build pictured in your shop, 914?
Mines Open diff but it's costing me time on some tracks waiting on the inside wheel, I like your way with the spool also. You should go well on 10" wheels, theory says you can run softer compounds at lower pressures, so long as you can get heat into them, where you are situated that may not be too hard lol

[4agedub]

Thanks. Yes, that is a 914... or at least it was long ago.




I'm going to try the solid spool on the 1303... and when funds permit go to LS.

[buildabiggerboxer]

That's gorgous even, some hours gone into it too, looks right up to date, well done on something different. Please Keep posting up on the 1303 progress, a few years back, I never thought I'd say it, but as you know, the beam works so well and takes some beating, I've also deduced that probably the quickest German kaffer cup car is a standard, and it's quick by handling, not grunt alone, it runs a through rod system, which is my next treat for mine, given the time and cash, here's a link to the cup car, either here or I'll repost it separately, regards BBB.

[buildabiggerboxer]

Found the kaffer cup vid here.
https://m.youtube.com/watch?feature=rel ... Xcksyuc0N8

[4agedub]

We have come very far with the link pin beam setup, biggest issue is the beam arm flex. This means that you need to run 3,5' static camber and under cornering forces this would reduce to around 1'. Braking does become a problem with 3.5' camber... the amount of rubber on the road is significantly reduced.

Those old kaefer cup cars were awesome... I understand most of them ran big type 4 engines.