Author Topic: coil-over (Read 8304 times)

2002maniac · « **Reply #15 on:** December 04, 2006, 11:39:23 AM »

sounds good! My effective spring rates are 400/422 (using the .65 calculation for the rear) and I think the balance is perfect! are you going to build the setup yourself?

What about valving?

If I had the money, I know my car would bebefit by revalving the shocks.

romkasponka · « **Reply #16 on:** December 17, 2006, 09:59:59 AM »

front 300/300 rear 200/200, or 150/300 100/200. I will ask bilstein for best setup.

D. Clay · « **Reply #17 on:** December 17, 2006, 01:12:58 PM »

The short track stock car racers now use Penske adjustables. They put the car on a skid pad (a big circle) and spring it for desired wheel travel and neutral handling at max lateral G's. This results in a slight under steer in the real world. Then they use the shocks to fine tune the car. They now change springs 2-3 times a season instead of 6-8 times. In real terms, front engine sedans are almost always stiffer in the front than the rear. A 2600# stock car usually runs 400# front and 200# rear springs. A TransAm Camaro or Mustang. will run 500#-700# front and 250#-400# rears. E30's usually run with 15" wheels and tires with a soft spring rate. E30 types in general use springs to control body roll in place of sway bars. They put stiff springs on the rear and take off the rear bar.

romkasponka · « **Reply #18 on:** December 17, 2006, 02:31:29 PM »

How much cost penske adjustable shocks?

D. Clay · « **Reply #19 on:** December 17, 2006, 08:07:05 PM »

Quote from: romkasponka;15742

How much cost penske adjustable shocks?

http://www.lefthanderchassis.com/107.html
http://www.lefthanderchassis.com/108.html
http://www.lefthanderchassis.com/109.html
$200 to $1000 each depending on the model. I don't know of any adjustable valving strut inserts.

romkasponka · « **Reply #20 on:** December 18, 2006, 03:43:42 AM »

http://www.avouk.com/pm/123

dino245 · « **Reply #21 on:** December 18, 2006, 09:13:49 AM »

The AVO struts are nice but the E30 has an itegral hub and strut so you would need to build a strut assy. with the axel stub onit.

romkasponka · « **Reply #22 on:** December 18, 2006, 09:16:46 AM »

AVO inserts nice too

romkasponka · « **Reply #23 on:** December 18, 2006, 09:19:18 AM »

Quote from: D. Clay;15739

A 2600# stock car usually runs 400# front and 200# rear springs. A TransAm Camaro or Mustang. will run 500#-700# front and 250#-400# rears. E30's usually run with 15" wheels and tires with a soft spring rate. E30 types in general use springs to control body roll in place of sway bars. They put stiff springs on the rear and take off the rear bar.

Spring mean nothing, you should say frequency.

Gunni · « **Reply #24 on:** December 18, 2006, 09:31:00 AM »

could you explain why frequency make more sense then spring stiffness?

romkasponka · « **Reply #25 on:** December 18, 2006, 09:48:07 AM »

because to make setup you selecting suspension frequency which you want to have, after calculation you get wheel ratio, and only after you calculate spring ratio. Your wheel rate could be affected by suspension type and geometry, so spring doesn't mean nothing if we are talking about various cars, because you dont know what you get on the wheels.

Gunni · « **Reply #26 on:** December 18, 2006, 10:10:49 AM »

Can you give me an example of how you calculate diffrence frequencies using 2 E30�s? only diffrence beeing wheels and spring rates.

Thanks

romkasponka · « **Reply #27 on:** December 18, 2006, 10:39:08 AM »

http://hometown.aol.com/EURORALLY/Suspension1.htm

romkasponka · « **Reply #28 on:** February 22, 2007, 02:45:47 AM »

update

romkasponka · « **Reply #29 on:** June 29, 2007, 08:56:41 AM »

almost done

http://romkasponka.blogspot.com/2007/06/tuoj-bus-surinkimas.html