Autox Spring rate help, Too Stiff? Options

[nolift914]

Is my Autox 914 too stiff?
I am currently running the PO setup, the 914 was set up for club racing with front and rear coil overs. The front is at 330lbs/in which I believe is the equivalent to 25MM torsion bars and the rear is at 230. The 914 is a 4 weighting approx 1780lbs with bias ply slicks. I plan on switching to Dot-R radials. I have always thought for autox go soft on springs and big on bars. Does the paddock crowd have any suggestions for a setup. The autox sites in NYC tend to be on the rough side. I was thinking either 175 lbs/in in front and 140 lbs/in rear or 200 lbs/in front and 180 lbs/in rear.

[J P Stein]

Looking at the supplied chart the answer would 21mm=250 in lbs & 19mm=170. Did your mom have much trouble toilet training you?

These numbers are approximates.

You'll not find an easy path to 914AX Nirvana without *actual testing*. This involves spending money for parts and then trying them out......or you can set back and seek more data.

[nolift914]

Looking at the supplied chart the answer would 21mm=250 in lbs & 19mm=170. Did your mom have much trouble toilet training you?


These numbers are approximates.

Since you stated their were various spring rate charts out there, I was looking for a consensus from someone who has run front coil-overs. Its an easy choice with torsion bars either 19 or 21 but with charts listing a 21mm from 170 to 250 and a 19mm from 115 to 175. So its not as easy as potty training.


You'll not find an easy path to 914AX Nirvana without *actual testing*. This involves spending money for parts and then trying them out......or you can set back and seek more data.

I have been AutoX for 25 years but the last 15 have been in a 944, I understand the testing process, that's why I post questions in the paddock so the "experts" can trim the expense and I can learn from them. Sorry I post such simple questions as I do.

[mskala]

I have been AutoX for 25 years but the last 15 have been in a 944, I understand the testing process, that's why I post questions in the paddock so the "experts" can trim the expense and I can learn from them. Sorry I post such simple questions as I do.

These are not simple questions as evidenced by some people posting
charts that can't all be correct, and feeling like there's only one way to do shit.

You picked up a car that was obviously set up for something else, so you
definitely have to put the time in to get it to work and feel the way you want
it. But definitely narrow it down by asking here too.