Rear Beam: Ride Height Questions

[Guest Fee]

Hi,

 

We have just raised the rear beam on the track 205.

 

It was too low before, but raising it by one spline has made it quite high! Roughly how much (mm) does 1 spline up/down translate too?

 

Another one.... The ride height was slightly out (we were going to try moving one side two splines, and the other one) but due to the large movement in the radius arm that wasnt practical!

What would cause one side to be aprox 10mm higher/lower than the other?

 

Thanks

[jonnie205 1]

Usually if the rear is lower on one side and the beam is set to an equal height then the front is where the problem lies. You will not be able to raise one side of the rear to meet the other as by raising one side of the rear you will actually raise both sides meaning the height is still wrong.

[Guest Fee]

I think it must just be a slight difference in the two bars....

 

After thi snext trackday i think i'll take both bars out, set the shock centres to a height and refit the torsion bars....

 

Does that make sense?

[Guest rick03054]

What about adjusting it on the other end of the bar?

[scotthall39 0]

Each spline should raise/lower the beam around 30-35mm,

 

As for it being uneven can you not adjust it by the shock or dummy shock.

 

I read about it the other day and though the only way to adjust was the spline method, but obviously not :0

[sonofsam 5]

Here's how i have done mine in the past, This has been from standard height to -30mm.

But it works every time, well three so far.

I have never used the dummy shock method or the 1 spline = method either, so im not saying this is a

better way, just the way i do it.

You need to take a measurment from the top or centre of the stub axle to the bottom

of the inner arch for reference.

Remove both torsion bars and shocks.

Say you were lowering 30mm, you minus 30 of the original measurement plus 5 for account of the shock.

Get a jack under the stub axle with the tape measure in place and get it to its new lowered position and measurement, and re-insert torsion bar, will take a little jiggling to find the exact point were it all lines up, but it should slide right in once you have perfected it.

Edited June 22, 2006 by sonofsam

[pug_ham 244 3 Cars]

One spline depends on which end of the splines you removed, centre tube end is apparently about 30-35mm each but if you remove the radius arm end then it is less but I don't know by how much (32 splines on radius arm end & 30 splines on tube end iirc so less than by tube end).

 

Best way imo is by removing both ends & setting the distance between the shock centres & rotating the torsion bar splines until they slide home easily & then refitting the offset washer & adjusting the stud to suit.

 

Graham.

[Guest Fee]

remove both torsion bars, set height with some dummy shocks.... seems like the way to go