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Author Topic:   Lack of body roll
quickone
Dirt Roller

Total posts: 6
posted June 10, 2002 11:05 PM
I'm having serious problems with a 3 link swing arm car. Am a novice at this and am looking for ANY professional advice...here is what I have.
Springs
LF 1000 RF 1100
LR 275 RR 250
Both rear springs mounted in front of rear end.
Shocks
LF 3530 RF 3530
LR 2040 RR 2020
Shock Travel
LF 1.5" RF 2.5"
LR 1.5" RR 1.5"
Trailing Arms
LR 14" Top hole on frame, middle hole on rear end.
RR 14.5" Middle on frame, middle on rear end.
Ride Hts
LF 6.75" RF 7.25"
LR 7.5" RR 7"
Cross 49%
Left 51%
Rear 60%
J Bar at second hole from top on pinion, and 9" up on frame.
Not sure what all the problems are with this setup, but here is what I see. (1)Can't get enough cross in the car, ride heights are already higher at RF and LR than any other corner. (2) Not NEARLY enought body roll on RR. (3) and most importantly, getting my tail smoked on dry slick tracks. Sorry for the length of this, but knew that all info would be needed. Oh, and does every car lose cross no matter where you place the lead on the rear end? Also compounding my problem...hope there is some experts out there...

[This message has been edited by quickone (edited June 10, 2002).]

2 fast 4 you
Dirt Full Roller

Total posts: 39
posted June 10, 2002 11:12 PM UIN: 24
I HAD THAT PROBLEM AND I FIXED IT BY GETTING RID OF THE J-BAR AND PUT A SHORT PAN HARD BAR ,KNOW IT HICKS UP

jlfastride
Dirt Forum Racer

Total posts: 79
posted June 12, 2002 11:22 PM
lower your j'bar on the pinion to get more angle im running a 3 link and hiking the lf with a j'bar that will make the rear stick much better on slick tracks too.

MOD178
Dirt Roller

Total posts: 9
posted June 13, 2002 08:13 PM
[
I run a 3 link swing arm setup on a Sardeson modified on dry slick tracks. I use a long panhard bar behind the rearend, with a dirtworks rubber pullbar. I use to run 1000 and a 1100 pound front springs with 250 and a 200 rear springs. This year I softened the front springs to 650 and 750. I think the car feels much better and gets mor body roll over. Here is what i am running now. This will be tight on heavy tracks.

lf 650 rf 750 lr 250 rr 200
lf 3050 rf 3050 lr 5030 rr4040
cross 52.5
left 51.4
rear 59.9
90 to 100 pounds left rear bite
19" trailing arms with left side in 2nd hole from bottom and right side 2nd hole from bottom. If track is sligtly tacky you sill carry the left front a little.
pull bar is 22 degree down mounted left of drive shaft, 37" long.

adding weight to any place on rear of car should not affect cross percent, should only affect left side and rear percents.

If you try this let me know if you liked or not.

thanks:
Allen Halderman
MOd 178

jammin
Dirt Administrator

Total posts: 5060
posted June 14, 2002 01:12 AM UIN: 16262997
The car wont be good on dry slick tracks because you have to add bite to the car by adding wedge or cross for the slicker tracks to add bite to the car to get it off of the corners better. You can do this by adding air to the rf or lr or taking air away from the lf or rr. This will help your bite. You can also further help yourself by changing offsets, taking the wheel away from the car will take weight off of tha tire, moving it in will put weight on it. Just another way to do this, but the cross situation won't help your roll problems. The hard thing with roll is that the car needs to be built to do this really. You can help it by taking away spring rate on the right front, but I think your case it would be both fronts, going with the softest shocks you can get away with and decreasing the RR spring rate will all help.


jammin

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