Coil overs, What do you think? Options

[jmill]

I saw these from RSR and they look pretty sweet. Does anyone run these? I have 911 Boge struts with 3.5 spacing now. Do you know if the A caliper will bolt up to these? What weight spring do I need? It'll be on a street/track 6. I'd like it more track than street. Is there something better or cheaper out there?

[gopack]

what is te advantage of coil over versus torsion bar? weight? geometry flexibility? cool factor?

INQUIRING MINDS want to KNOW

[Chris Hamilton]

what is te advantage of coil over versus torsion bar? weight? geometry flexibility? cool factor?

INQUIRING MINDS want to KNOW

Cool factor. Don't they look bitchin?

The weight is just being moved from the bottom of the car to as high as you can put it in the front. Seems like a step backwards to me...

The geometry remains the same.

The only racecars porsche ran with these had extensive modifications to the front end to stiffen them. Just because people don't have broken front ends doesn't mean they aren't flexing all over the place when they would have been otherwise stable. You move the spring forces from the bottom of the car where the A-Arms mount to the tops of the struts.

If you have considered those factors and determined that the loads and advantages of the coilover setup are necessary for your racecar, you've probably already got them on there and aren't asking about it on a web forum. (IMG:style_emoticons/default/idea.gif)

[SirAndy]

The weight is just being moved from the bottom of the car to as high as you can put it in the front. Seems like a step backwards to me...

The geometry remains the same.

(IMG:style_emoticons/default/agree.gif)

I just don't see any weight savings. Torsion bars are not *that* heavy, plus, they're about as low in the car as you can get.


The only real advantage i see is better spring rate adjust-ability as you can choose from a much larger selection of different springs.

Torsion bar selection on the other hand is somewhat limited ...
(IMG:style_emoticons/default/popcorn[1].gif) Andy

[Chris Hamilton]

The only real advantage i see is better spring rate adjust-ability as you can choose from a much larger selection of different springs.

That and progressive springs. I haven't found any progressive torsion bars yet (IMG:style_emoticons/default/idea.gif)


The general idea is that the selection isn't as cut-and-dried as "bolt this on your car and go faster". It's more like "I've exhausted all the possibilities of working with the Porsche stuff ( hundreds of hours of testing ), so I need to go with something more advanced."


That's why I love those RSR struts. They aren't adjustable, they just work. You could run yourself ragged in circles ( and broke ) with four way adjustable shocks and spring rates and progressive springs and all sorts of clever stuff and never end up with a combination that works all the way.