Torsion Bar questions Options

[Aaron Cox]

Bear with me: (IMG:style_emoticons/default/wink.gif)

• how long do torsion bars last?
• I want stiffer than stock Tbars up front- what size is ~ equal to 140 lb rears?
• I have a 911 front suspension to go in, so i can run used 911 torsion bars?
• Is this a good idea?
• What were the stock sizes for 911/914's?
• thats it for now?

Thanks (IMG:style_emoticons/default/unsure.gif)

[brant]

Aaron,

I'm sure someone can chime in here with more detail.. but in a nut shell:

914s came with 17.8mm
911s came with 18.9 (or something like that)

they do not interchange becaue they have a different number of spline, as does the inside of the A-arm.
You can buy aftermarket of either style 911 or 914.

If you haven't replaced your stock ball joints and front suspension bushings yet... then its a good time to just buy the 911 style and upgrade... If you've already done those 2 jobs, then buy the 914 style.

Spring rate?.. good question. Its hard to say what is best because that depends upon intended use and driving style. someone will connect a link which shows the table to the different rates as they compute from MM. But for 140rear springs my own advice would be 19mm or maybe 20mm. (one of the reason to buy 911 arms is that you can usually get the 19mm bars for free (no one wants stock bars in their 911) and thus the upgrade includes the increased spring rate.

Misc=
-they last until they rust or crack
-if you upgrade arms take the sway bar mounts into consideration.
-there is an early and late style of ball joint

brant