16 or 17mm dia Front Torsion Bars

[chris_seven]

I need a pair of 16mm or 17mm diameter front torsion bars.

I think that the 16mm bar was made for an RSR and the 911R used a 17mm dia.

I don't want to try reduce the diameter of stock bars as they are quite difficult to machine and the residual stresses may cause a fatigue problem.

Any ideas?

[70SATMan]

Originally Posted by chris_seven

I need a pair of 16mm or 17mm diameter front torsion bars.

I think that the 16mm bar was made for an RSR and the 911R used a 17mm dia.

I don't want to try reduce the diameter of stock bars as they are quite difficult to machine and the residual stresses may cause a fatigue problem.

Any ideas?

Torsion bars or Sway Bars???

19mm was the standard front Torsion bar. I believe the original RSR ran at the most 21mm.

As for sway bars, RSR ran both the 18 and 19mm front sway IIRC

The R ran the front 15 or 16mm sways I believe.

Never heard of 16 or 17mm front Torsions.

[Jack Olsen]

You are misinformed. The RSR and 911R did not use torsion bars in those sizes.

[chris_seven]

Originally Posted by Jack Olsen

You are misinformed. The RSR and 911R did not use torsion bars in those sizes.

I now realise that I did make a mistake

It was not the RSR that used 16mm dia front torsion bars it was the 911 SC/RS and they were in fact 16.7mm dia

Part Numbers 954.343.101.00 L 954.343.101.00 R

From 911 SC/RS Parts List



It is also true that the 911R did not have 17mm dia bars they were in fact 17.1mm.

Part Numbers 901.343.101.13 L 901.343.102.13 R

From Catalogue E-133 November 1967




I will try to be more accurate in future.

All of these parts are, of course, NLA I was just hoping to find some old stock.

I guess I will have to gun drill some hollow bars to give the equivalent stiffness.

[Flieger]

Wow, why so soft? Did the Larousse TdF 911R lightweight also use such soft bars? I am surprised that the SCRS used even smaller bars.