Rear torsion bar.

[Bad bug]

Good day All.

Would like to know what would be the next step up in torsion bar for the irs backend. I want them slightly stiffer than stock as i will be running a 2.0ltr type4 and 091 gearbox in my car. The spline end that goes into the chassis reads out as 33mm.

[Steve C]

Hi

The bar size is measrured on the shaft between the splines. IRS Beetles use 22 mm bars stock, a cost effective upgrade is the 23.5 bars from a Type 3 wagon or some 944 Porsches had them, not from a Notch or Fastback, these are the same as Beetle bars.

The next step is either bigger 944 or after market bars from Sway Away etc. These can be expensive.

Steve

[Bad bug]

Thank you for the info steve.

[helowrench]

Actually when I measured some stock removals (including my own from a ghia), I found the stock to be 20.5 or 21. Stock from a P 924 is 1mm higher, with a 924T being 1mm higher than that. stroll on over to http://924.org/techsection/10suspension.htm and in the tech section under suspension, they list all of the combos that came stock from the factory for the 924/944/968 series (all fit Type 1 rears with no mods AFAIK) I have personally installed 924 bars in my ghia. A bit of a difference. I now have 924Turbo bars that will go in at the next opportunity, since I want it a little stiffer still.
The cool thing is that the 924 and 924 turbo bars are cheap on Eslay (I got mine for $10 per set plus $15 shipping) because no 924/944/968 owners want the "small bars"Model

http://cgi.ebay.com/ebaymotors/porsche-944-924-rear-suspension-24mm-torsion-bars_W0QQcmdZViewItemQQcategoryZ42609QQihZ003QQite mZ130245976664QQrdZ1QQsspagenameZWDVW

http://cgi.ebay.com/ebaymotors/87-Porsche-944-944S-Rear-Torsion-Bars-DOHC-S-model-pair_W0QQcmdZViewItemQQcategoryZ42609QQihZ008QQite mZ180255023818QQrdZ1QQsspagenameZWD1V

http://cgi.ebay.com/ebaymotors/1986-944-turbo-Porsche-TORSION-shafts_W0QQcmdZViewItemQQcategoryZ33696QQihZ002QQi temZ120269260744QQrdZ1QQsspagenameZWD1V

BTW the "24" are probably the 23.5mm

Rob