Suspension set up Chevelle

[shockme668]

I don't know if weight play a big roll in my cars performance (About 3000# 1970 Chevelle) but I'm trying to get as much info as I can. I change out my suspension and put strange double adjustable coil over shocks and anti roll bar in the back. In the front I have QA-1 double adjustable coil over shocks. I have a friend that has four corner scales that I can use, but I am looking for some help. From what I read it looks like it should be a 50% weight left to right and front to rear weight. I should have my car into the high 9 and bracket racing in the 10.20 index class. I would appreciate any help

[1320racer]

Front suspension has got to be right before worrying about rear suspension. What is it besides the QA-1s?

A Chevelle at 3000 lbs., is pretty cut up so 50/50 should be doable.

That said, my 3880 lb. Chevelle was 59% front/41% rear and ran in the 9's launching wheels up every pass.



What is the rear suspension is in it now? Footbrake or transbrake launching?

Some preload on the right rear is required, which will put more weight on the left front.

Make all adjustements with you in the seat.

[shockme668]

Front is chrome molly tubular control arms, wilwood drag brakes w/vented rotors and double adjustable coil over shocks. Rear is strange coil over double adjustable shocks with a anti roll control. It has a 400 trans with a trans break. I think about 3000# maybe 3200#. wont know till I weigh it. It also is a big block with solid roller cam.

[1320racer]

Has stiction been eliminated in the front A Arms? How much travel do you have? Are the springs the correct rate for the weight over/on the front tires? Is the front end sitting at the correct ride height static?

[HP HUNTER]

Originally Posted by shockme668

I don't know if weight play a big roll in my cars performance (About 3000# 1970 Chevelle) but I'm trying to get as much info as I can. I change out my suspension and put strange double adjustable coil over shocks and anti roll bar in the back. In the front I have QA-1 double adjustable coil over shocks. I have a friend that has four corner scales that I can use, but I am looking for some help. From what I read it looks like it should be a 50% weight left to right and front to rear weight. I should have my car into the high 9 and bracket racing in the 10.20 index class. I would appreciate any help

First thing you need to do is scale it, its probably heavier than you think. I think the Afco double ajustables work good on the rear, I usually limit front end travel, but my car is 50/50, of course 30x9 Hoosier radial, 28 inch moroso up front. Bob West would also be a wealth of information on this subject, "72 Chevelle"

[shockme668]

Ok I just got the scales and it is 2900# and 3100# with driver. The corner weight with driver are LF 897# RF 827# LR 688# RR 688# .That is 55% up front and 45% in the rear. As for stiction I have new control arms and properly lubricated. I had a local chassis builder order the springs and I think they are the proper ones. I am still researching the way to set proper ride height.

[REGGIE WINKLES]

Call Alf Wiebe in Vancouver B.C. he is the man on coil spring suspension. There's a trick to them cars....and he knows it. I use his set up on my 84 Camaro stocker (with coil springs) and it works. Hope this helps.

[J.O. 71 chevelle]

Does anybody know if Alf Wiebe still produces his suspension setups?

[SSGN]

Originally Posted by 1320racer

Front suspension has got to be right before worrying about rear suspension. What is it besides the QA-1s?

A Chevelle at 3000 lbs., is pretty cut up so 50/50 should be doable.

That said, my 3880 lb. Chevelle was 59% front/41% rear and ran in the 9's launching wheels up every pass.



What is the rear suspension is in it now? Footbrake or transbrake launching?

Some preload on the right rear is required, which will put more weight on the left front.

Make all adjustements with you in the seat.

Looks like an Alf Weibe set up to me

Kevin

[Bill Baer]

Originally Posted by shockme668

Ok I just got the scales and it is 2900# and 3100# with driver. The corner weight with driver are LF 897# RF 827# LR 688# RR 688# .That is 55% up front and 45% in the rear. As for stiction I have new control arms and properly lubricated. I had a local chassis builder order the springs and I think they are the proper ones. I am still researching the way to set proper ride height.

Well Rob just don't get hung up on getting it to low. While it may look cool the lower you get the center of gravity the more difficult it is to make tithe car pitch rotate and for pro tree racing you definately want it to pitch rotate as quick as possible.