Visit The Dirt Forum for More Information

Author Topic:   spring base
dirtbuster
Dirt Forum Champ
Total posts: 2007
posted August 20, 2004 11:39 AM  
Which is better or is it the same in the end just different ways of getting there.

A. rear suspension with the springs set like 10" in from wheels.
or
B. same thing but with narrower spacing but stiffer springs to keep the same rate at the wheel.

After looking at our DW 4link car and at Skyrockets and Harris the DW has the rear springs prob easily 6-8" nbarrower than the others especially the RR. WE have been stiffening the rear especially the RR and car keeps getting better but trying to decide if it would be better to move the springs out for a wider base and run the softer springs.

WPP
Dirt Freak

Total posts: 451
posted August 22, 2004 06:01 AM  
Dirtbuster i also have a dw dw8 2002 i put weight jacks on the springs are on the inside of the rails i have also know that the sky rockets spring base is wider how stiff have you been running what i have notice on the dw9 the spring at the top is tilted toward the centerline on the right rear. Right now i have been 225s across the rear have been think to going to a 250s and i am on ump tires.

mod70
unregistered Total posts: 451
posted August 22, 2004 10:55 AM           send a private message to WPP   Edit/Delete Message   Reply w/QuoteBBBBBB
Without directly answering the question, if you mount the springs closer to the center, you will have to run them stiffer than is they were set out wide. That's just a leverage thing. If you have a narrow spring base you will get a faster reaction out of the car, but the forces will not load the wheel as much. The wider the base, the more stable it will be. My thinking is that on a rough track, or one with alot of banking, the wide base would be better. On smooth, flat, or wide turning tracks the narrow base should be better.
Of course this is just my opnion, I could be wrong.

dirtbuster
Dirt Forum Champ
Total posts: 2007
posted August 22, 2004 06:59 PM  
We were running 250RR at onepoint but still wasnt good enough. Started looking into it and it seems like the jack bolt hey have on the RR and the clamp on the houseing for the spring dont match angles for one and also as the car is rolled over the rearend moves to the left far enough that the spring goes past center and then starts to lay down sideways instead of compressing vertically. This past weekend we ended up moving the spring out to the birdcage and welded in a new jack bolt. It made a huge differnce in the car, entry middle off, faster everywhere, and more stable. I think the spring on top could work like the skyrocket cars but not the way DW has it set up, they just have the wrong angles/alignment to make it work. And going stiffer on the spring only helps to a certain poiint becasue like i say the spring goes past vert and starts to lay down sideways.

[This message has been edited by dirtbuster (edited August 22, 2004).]

zeroracing
Dirt Forum Champ
Total posts: 1875
posted August 23, 2004 02:00 PM  
wide as possible is always best in my book. the wider the base the harder the car is to upset when you hit a rut or stomp your..... i like the widest i can fit under the car.
some guys like it narrow but i prefer wide.

HONDO
Dirt Full Roller

Total posts: 47
posted August 24, 2004 01:39 PM  
I agree with zero. Wide is good. I moved mine outside the frame rails on an older Shaw and it seemed to stabilize the car. It resticts how far I can move the RR in though. I can only use a 3 offset with a 1/2" spacer. I'm 43" center to center on the springs using weight jacks with the right on top and the left ahead of the rearend.

dirtbuster
Dirt Forum Champ
Total posts: 2007
posted August 24, 2004 02:59 PM  
I wish we would have measure dthe spring base on our car, but i know moving the RR spring out made a big difference. WE could move the left but I dont know whether it would gain us much its not too bad. The RR setup was bad though. Even in stock form from DW the spring may have been lined up good at ride height but as the car rolled over the jack bolt and the spring cup on the rearend went out of alignemnt besides being angled in the wrong direction. It was trying to stretch and bend and pull the spring in all different directions. When we redid it we made it so that it load the sprign square as the car is rolled over even though it looks a little funny at ride height.

Back to the Archives