Fitting Porsche Brakes to a 1302

[Simon]

Originally Posted by evilC

On reflection I should have used a Heim joint with a fabricated pin to fix into the bottom of the spindle carrier that would have allowed greater camber adjustment. that will now have to wait for the A arms that I intend to fabricate.

Interesting point!
Are you sure a heim joint can handle such a large axial load?
Aren't there any high angle ball joints available that would fit?

[piledriver]

Still have the overall dimensions for that fabricated arm?
I'm chafing to get on this.

The high angle ball joints I have seem have a very short service life.

I went up and looked again at the 1302--- I see no reason an extension of the existing arms wouldn't work.

The 944 and a Mk1 Golf use the same ball joint AFAIK. That would be the easiest way.

FWIW---

Found a mid-year 944 yesterday at Pick-N-Pull (or mabe it's U-Pull it...) in Garland, Texas yesterday.

Mid year model, steel brakes, but aluminum rear arms.
Had a small fire under the hood (really), silly thing looks easily repairable at first glance.

Seems essentially complete other than the wheels. Still has 1 phone dial on it.

[evilC]

[QUOTE=piledriver;67321]Still have the overall dimensions for that fabricated arm?
I'm chafing to get on this.

The high angle ball joints I have seem have a very short service life.

..............................QUOTE]

I'll have a look. I was not completely happy with the design as I tried to incorporate a caster adjustment in the bottom ball joint mount - hence my desire to create a compression strut fabricated bottom arm (think of the Japanese Racer with the caster adjusting rod (tension rod) on the cab side of the main track arm.

I did some very quick calcs on the angles involved and it wasn't that bad especially with a lowered suspension say 40-50mm.

evilC

[piledriver]

Interesting article/pics.
http://www.sportcompactcarweb.com/te...t_3/index.html

Particularly the monoball installed on the Sentra LCA...

Checked out Coleman Racing the other night, good stuff, cheap.

As to the caster, it's too bad the SB sway bar/forward link isn't threaded...

The super long lower arms on the 1302/3 make a great starting point geometry wise.

[evilC]

I don't like the SB AR bar to control the caster as there is too much compliance in the system even with reasonably hard PU bushes. Thats the main reason why I want to use a compression strut to triangulate the TCA that will afford adjustment for caster and locate the bottom strut joint more precisely. Also, the AR Bar mount then is located with double heim joints that will allow adjustment of the fixing location, altering the lever arm on the AR bar itself that means that the roll stiffness can be altered.
Finally, another advantage of dislocating the AR bar from the TCA is that the anti-dive can be dialed in on the inboard 'A' arm mounting points rather than lowering the AR bar with all the compromises that that entails.

evilC

[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)

[evilC]

Originally Posted by $aint

Interesting point!
Are you sure a heim joint can handle such a large axial load?
Aren't there any high angle ball joints available that would fit?

We are talking normal formula race car detailing here and the loads on a beetle front suspension are infinitely smaller. when was the last time that a beetle managed a 3G lateral load??????

evilC