Fitting Porsche Brakes to a 1302

[piledriver]

Locating links w/spherical ends and using a "normal" sway bar sounds better, and shouldn't be too hard to pull off.

Might even be able to improve the geometry at the same time,

Slightly off topic:
Do 944 seats fit easily in a later SB?

[evilC]

Originally Posted by piledriver

Locating links w/spherical ends and using a "normal" sway bar sounds better, and shouldn't be too hard to pull off.

Might even be able to improve the geometry at the same time,

Slightly off topic:
Do 944 seats fit easily in a later SB?

I currently have a new fabricated TCA (50 x 30 x 3.03Kg) with PU bushes for the AR bar and inner pivot; dropped inner pivot point to drop the roll centre; flipped AR bar with PU bushes. The outer ball joint is on an adjustable carrier to set the caster from around 2 deg to 5 deg. It works but as said the A arm/compression strut would have been a better solution. The amount of fabrication just to put the spherical links in with a normal sway bar means that it is but a little step to do a full A arm fabrication that incorporates less adaptation (botches) to acheive a much better result.

evilC

PS I have fitted Alfa 116 GTV seats that are similar to 944 ones - God! the drivers seat is heavy (height adjustable)

[yetibone]

Man, y'all had to blow the dust off this thread!

EvilC, I think what I ended up doing with my front end is similar to what you've got planned. I started with late 1303 control arms, and added a triangulating member that connects to the frame head with a 13mm heim joint. The sway-bar is no longer a structural member of the front suspension, so I connected it to the control arms with drop links. By screwing the heim joints deeper into the triangulating arms I fabbed onto the stock control arms, I can increase caster.

pics and such from another thread Pictures of the completed arms are a couple of posts down the page.

The difference in driving the car is noticable. The steering is much steadier under hard braking.

[evilC]

The way you did goes some way to what I am thinking but there are a few points of difference:
1) The stock TCA will be discarded and a new A arm in CHS will be fabricated with the triangulated link being in compression rather than the tension arrangement you have, the connecting point of the triangulation being closer to the stub axle end. I'm not sure yet whether the inner bush will be retained or bit the bullet and go full heim joint.
2) The ball joint end will have a heim joint to enable the camber to be adjusted.
3) The compression strut of the A arm will have a heim joint at each end to enable the caster to be adjusted in situ.
4) The AR bar will have a separate pair of heim joints as yours but will be solidly located to the A arm and not through the old TCA bush.

I am expecting better control under braking as you experienced as well as better responsiveness in the corners, all of which should aid confidence in the car.

evilC

[Simon]

Originally Posted by evilC

The way you did goes some way to what I am thinking but there are a few points of difference:
1) The stock TCA will be discarded and a new A arm in CHS will be fabricated with the triangulated link being in compression rather than the tension arrangement you have, the connecting point of the triangulation being closer to the stub axle end. I'm not sure yet whether the inner bush will be retained or bit the bullet and go full heim joint.
2) The ball joint end will have a heim joint to enable the camber to be adjusted.
3) The compression strut of the A arm will have a heim joint at each end to enable the caster to be adjusted in situ.
4) The AR bar will have a separate pair of heim joints as yours but will be solidly located to the A arm and not through the old TCA bush.

Are you planning on doing this?

Just to be sure:
Would you still use the inner mountingpoint of the stock LCA?

I've always wondered why the 935 setup uses a tension arrangement, nice to see you'd use a compression one

I know i've said it before, but a heim-joint/rod-end at the outer side of the A-arm isn't really good design. the axial load is OK (though it's made to withstand a much larger radial load), but mainly because of the bending you apply to the shank of the rod-end.
A spherical bearing mounted in the A-arm is a much better design.

And do you think you'll gain a lot with adjustable caster?