Catorce

With 3 out of four coil overs replaced (two on the right side), you can see how much the ride height has dropped. Keep in mind these aren't set whatsoever; I simply screwed the collars down to about 2" from the bottom.

Obviously ride height will be set with the motor in, etc. as part of the corner balancing. Still a dramatic decrease. Old picture for reference.

OBehave2.0

That is just Bad ***!!

Catorce

^Thank You!

Catorce

Well, after disassembling, refurbishing and reassembling the right front suspension, I am better aware of its design.

Recall that alignment holy war we had some pages back (maybe most of it got deleted), where some of the alignment jihadists got their turbans in a knot about the correct way to align a 928?

After looking at the suspension parts in detail (i.e. in my hands), I submit the following:

Theory: My car no longer needs to be concerned with a pre alignment lifting affecting the end result.

Support:

• The factory bushings which are comprised of a metal ferrule bonded to a cylinder of rubber and that are subject to preload are no longer present on the car.
• The UCA and LCA (four points) have delrin and aluminum greased bushings which, by design, cannot bind or preload in a given position.
• No other components in the front suspension are capable of 'taking a set'. All such components have been eliminated.

Conclusion:
Aligning this car after a lift is pretty simple. Roll it around or drive it around the block to get the tires to assume their fully flat position and fire away.


What do you think?


Discuss.

James Bailey

With out the bonded rubber "springs" on the bushings.....no issues with settling the suspension.

Randy V

You located the power steering reservoir in the cockpit?

Seems contrary (to me) to store flammable liquids within the driver environment.

edit - after looking more closely, I'm not seeing any fluid lines from that canister, so perhaps it is not a fluid reservoir as I initially thought.

Bigfoot928

he is going to add the hoses later.

Catorce

Randy,

You are 100% right - there is in fact a fluid filled power steering pump located within the cockpit. I'd estimate the reservoir holds about half a quart to a quart of fluid. The lines of course hold more.

It is a calculated risk; there is no room for this pump in the engine compartment and it's a far run to put it back in the firewall.

I am not super concerned with this for two reasons;

1. Many race cars (in other series) are running 5 GALLON oil tanks in the cockpit. Huge! No real issues with those.

2. This setup was copied from Joe Fan's car. He has his mounted slightly further aft because he has no passenger seat. He's had it for a while to my knowledge,.

Definitely not an ideal location.....but I think it will work. It will also be real close to the fire suppression system discharge hose.

Rob Edwards

The Zombie has the same electric pump behind the passenger seat. Trivial compared to the dry sump tank in the footwell.

Catorce

Yep, I was going to ask if you had that Rob. I figured the Zombie had it.

Catorce

Today I tore down the driver side front suspension. I was greeted by the usual stack of Devore Spacers, except in a different stack of sizes to make up the 18mm he needed.

Problems found:

- Same leaky bearing oil seal as the other side. Gross!
- UCA ball joint boot starting to tear on the bottom half. I don't want to replace the whole arm....this is fixable.
- Rearmost sleeve on the LCA was completely loose, just hanging in the breeze.

I have these types of bushings on my 914-6 and 930 build. Basically, what the manufacturer does is grind away the rubber from the LCA, then they use a 2 part epoxy to bond the sleeve to the LCA. This is a JB Weld type epoxy, which takes up the gap between the cast LCA and the sleeve.

This epoxy was completely absent in the left side rear LCA, so the sleeve could rotate at will. I'd give this less than 10 miles of driving before the thin soft aluminum gave out which would lead to the ultimate destruction of the entire bushing.

This is an interesting find because it implies the car was driven at some point. No way this kind of wear happened from sitting. Also it is almost out of grease.

Pretty happy with this tear down so far. I found and fixed a ton of little stuff like this which would have sidelined the car if it wasn't gone through.

Imo000

Get the Audi 100 ball joint boots from the dealer for $10 ea.

Catorce

From the Porsche dealer? Cool, will check it out thanks for the lead.

Catorce

Hey Imo I found them and bought them online! I didn't even know you could get just the boots. Thanks very much for the tip!!!!

pcar928fan

You are making great progress here! Congrats!