924Board.org

[Rasta Monsta]

Need a quick question answered. . .

I neglected to take an important suspension measurement before removing it from the car, now I am trying to "make it up". . .My goal is to position the suspension on the floor as it would be when installed in the car, but unloaded. So, the assembly has to be properly "leveled" in relation to the floor. I am looking for a reference on the suspension that is level, or close to level, when installed in the car.

What I am eyeing now is the horizontal bolt that goes through the large bushing at the front of the t-bar mount. It looks parallel to the door sill. Is it? What about the flat end of the banana arm?
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Toofah King Bad

• WeiBe (1987 924S 2.5t) - 931 S3

[ideola]

Unfortunately, both of the cars I have access to at the moment are not running stock ride height, so I can't help
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erstwhile owner of just about every 924 variant ever made

[ic932]

Rasta, I use the banana arms as my North South axis and the tube for the East West axis. Obviously they need to be level at the same time. Just double check that both banana arms are giving the same reading.

Rig everything up so that the bars and springplates can be easily tested without disturbing the jig.

I use a cheap angle finder (as in pic) to determine the final springplate angle.

As a final test make sure the plates are level compared to the beam (see pic) Oh yeah, loosen the springplate eccentric for fine adjustment.




Obviously, this is just a mock-up to show you how I do it, I use small magnetic spirit levels on both banana arms and use steel shims to set the precise axis levels.

Dan, ride height is only a matter of the springplate angle. I think what Rasta is asking for is how to achieve setting up the springplate angle against a suitable known horizontal axis?

BTW, an angle of approx 18 deg on the stock 944 set-up I have illustrated. 23.5mm bars. Everything was pretty level but my angle reader is far from accurate but good enough to get even results for both plates. Comparing like with like....

[Rasta Monsta]

IC, that is what I ended up doing. I set the assembly so the forward torsion mount bolt was level, and as it happened, the banana arm was level as well, as in your pic above. This week I get fasteners and spring plates zinced, and I may get the torsion carrrier powdercoated for rust protection, then it all goes back together.

[ideola]

Right, I understand that, but the technique I've heard of noting the angle as compared to the garage floor on a suspension in the car will only work if you're aiming for the same ride height and have the same torsion bars. Since the UWB has 30mm t-bars and is lowered to ~5", and since the 941 has been lowered to around 5.5", using either of them as a reference would not have worked for Rasta. I think.
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erstwhile owner of just about every 924 variant ever made

[Rasta Monsta]

You're still misunderstanding. . .I am using the "spreadsheet" technique, that relies on "loaded" and "unloaded" height of the t-bar carrier from the ground. The spreadsheet takes into account spring rate differences between different size t-bars, as well as any desired ride height change.

I ran into a problem when I forgot to measure "unloaded" height before pulling the suspension from the car, so I was trying to set the assembly up on the ground (wheels on) to get that measurement.
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Toofah King Bad

• WeiBe (1987 924S 2.5t) - 931 S3

[Fifty50Plus]

Rasta,
I've got an '82 tub riding on its suspension but otherwise no other parts still attached. Do you want me to take any measurments now that IC932 has given you a starting point?
Chuck
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1979 924 NA race car H-Prod SCCA
1982 924 NA race car - Sold
1981 924 Turbo sold
1982 924 Turbo sold
1972 911 E race car - traded for Cayenne Diesel
1975 914 1.8 Building for H-Prod SCCA

[ideola]

[Rasta Monsta]

Chuck, thanks for the offer, but I already leveled it the best I could, took my unloaded height measurement, and stripped it.

We'll see how it looks back together. Hopefully I don't pull a Morghen and end up unable to get a jack underneath it. . .
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Toofah King Bad

• WeiBe (1987 924S 2.5t) - 931 S3

[Rasta Monsta]

For future thread searchers, the SPREADSHEET MENTIONED IS HERE.
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Toofah King Bad

• WeiBe (1987 924S 2.5t) - 931 S3