front torsion bars question

[helowrench]

does any one know:
how many splines are on the inboard ends
how many on the outboard ends
overall length
what sizes came stock

Wierd i know but I am trying to do some research

Thanks
Rob

[Dave at Pelican Parts]

The answers you seek can be found in the factory service manual, and possibly also in the "little spec book".

Splines: 29 (914-4) 30 (914-6)
--I believe they have the same number of splines at both ends.
Length: 611.5mm (24.075")
Diameter: 17.9mm (0.705")

The "length" figure, I think, the overall length--but it could just be the length of the "working" part. The "diameter" is the diameter of the "working" part.

Note that the -4 and -6 bars are the same sizes; the only difference is the number of splines on the ends. And those are the only stock 914 torsion bars--any others are aftermarket replacements or (possibly) were special-order racing parts.

--DD

[SGB]

bizarro! Dave, speculate on this amazing tidbit.... why do you suppose the torsion bars for the six was machined with 30 splines? What would differ as a result?

[helowrench]

ok, are 911 bars of the same dimensions?

BTW dave I do not own a teener (patience, patience). So i do not have the reference manuals necessary to look this up myself.
but i do hope to eventually.

This is a research issue for another vehicle of mine.
I am trying to find if any other t-bars might fit.


Thanks much
Rob

[Dave at Pelican Parts]

The 914-6 bars are 911 bars. Though I'm not sure which, if any, 911s came with 17.9mm torsion bars. The 914-4 bars are VW 411/412 bars, I think...

--DD

[helowrench]

Thanks so much for your expert assistance

I will post updates here as I find more information.

Rob