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Author Topic:   How much spring have you ran on the right rear of three link?
JT54
Dirt Maniac

Total posts: 170
posted May 06, 2005 10:45 AM  
Other than the typicle 175 or 200 right rear how much have folks ran.....I ask because I am now running 225 lr and 200 right rear and car is rolling way over on right side and pulling monster weelies ....looks realy cool but ***** to drive...high bank 1/4 mile track....I am running spring in front on left and spring on top and just to the rear of the housing on right,14 inch shorty bar left of pinion ,top hole on pinion,31/2 to4rake...58 to 60%rear 160 lb lr bite ...I think too much lr is my problem but I have it in my head that I love how well the car hooks up I dont want to loose it by removing lr bite ....sooo...my? is will more spring rate at right rearhelp or what?...I was thinking 225 or 250...any advise out there ....I am tired of the wheelie show ....thanks

Xtreme12x
Dirt Forum Champ
Total posts: 874
posted May 06, 2005 10:51 AM  
Move your panhard bar down on the pinion and chassis equal amounts. I'd run the bar even with the pinion to start, it will help get rid of the roll, but might tighten the car up a little overall.

Xtreme12x
Dirt Forum Champ
Total posts: 874
posted May 06, 2005 10:52 AM  
Just another tid-bit
I have ran down to a 150 on the rr of a car with a very high center of gravity and had the panhard mounted low in the car, it rolled over some but not a ton. You also might see exactly where the spring is mounted, if it is in a ways from the wheel you might even up the rear springs...

dirtbuster
Dirt Forum Champ
Total posts: 2007
posted May 06, 2005 11:02 AM  
We have run up to a 250 there with spring on top. now running a 225 on the RR. But ours is mounted in front of the birdcage.

Why do you have the spring jsut to the rear of the housing on the RR?? How much is it back?

Also what kind fo car?

[This message has been edited by dirtbuster (edited May 06, 2005).]

GRTWallbanger
Dirt Maniac

Total posts: 196
posted May 06, 2005 12:18 PM  
Would'nt lowering the panard bar on both sides make it roll worse?Lowering the rear roll center???

dirtbuster
Dirt Forum Champ
Total posts: 2007
posted May 06, 2005 01:11 PM  
Is this a short 2 link? I thought I read somewhere where it was, but cant find it now. If so how much angle do you have in the LR bar. Lots of angle in the short bar, and with a short panhard bar is hard to keep the LF down.

I am still not sure I understand why you have the spring mounted just to the rear but on top the housing. I would think that in the corner as the right side pushes back due to roll steer that you would be unloading the spring a little , then as you get on the gas and the rear housign rotates you are unloading it more. May not be much but might make a difference. If the car is just rocking back under throttle it may be because the RR spring is being uloaded and not holding that corner up.

JT54
Dirt Maniac

Total posts: 170
posted May 06, 2005 01:56 PM  
I origionaly designed the rr mount back from the centerline of the housing because I figured it would tighten the car up off the corner ...but I have also been thinking that it is always unloading the spring and making the car stay layed over.....I have had a spring on coe infront but it was bad loose on dry that is why I am trying to make the spring on top work.......I also have a dual spring pull bar that is moving to much I think ,31/2 to 4 inches ...so when I am in the throttle it is taking the left spring and realy loading it and it is just throwing the chassis over on the right side....I have put a stiffer spring in the pull bar but I need to pree load it more.....oh well lots to think about ...I do have a fast car but it will be sooo much faster once I sort out these isues.....keep the replys coming ,I aprerciate every ones knowledge...JT

HERNDON
Dirt Full Roller

Total posts: 73
posted May 07, 2005 08:39 AM  
Seems to me like you have a front end geometry problem if you need to run 160# of left rear.

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