Coilovers mounts (1 Viewer)

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Joined
Jun 2, 2009
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Hi
I don't have any experience with coilovers - my previous cars had springs separately from the shockers. In new car I decided to install coilovers and made mounts by myself. I thought that everything is fine but during the turn car tilts to much. I tryed to put stiffer springs but it helped just a little bit. Stiffening the shockers also doesn't help. During the turn car acts funny, as if it was suspended only in the middle of car (in the other words car acts a bit like car that has one coilover in the middle of the axle and you can easyly tilt it-of course it is an agzageration). Yesturday I looked at the back of the car and realised that I may have made a big mistake. At the picture below you can see the back of my buggy. Lenght marked with red colour has 132cm, blue one has 62cm. Shouldn't I move upper and lower mounts more to the side of the car, so coilovers would be able to produce more force during the turn?
aa5ca34b9e090d90.jpg
 
Moving the mounts that are on the axle out closer to the wheels will help. the upper mounts are probably OK where they are. Since you've already put stiffer springs in, I won't talk about doing that too.

Try moving the bottom mounts, and then if the body roll is still too much, you may need to look into something like a "Anti-rock" swaybar.
 
Lower mounts are as far to the side as possible - coilovers are very close to the frame. If I want to move them I have to cut back of the frame anyway so moving upper mounts won't be any problem. I just don't understand why you say that upper mounts can stay as they are. Basic science rules tells me that upper mount has as big influence on the problem as lower. The closer you go to the centre of the car with upper mount the higher you can go with left wheel when right stays on the ground. However, if you take the springs out car won't go closer to the ground as much as you can lift one wheel.
Putting it in the other words: having assumed that upper mounts are close, left shocker is totally bounded and right one is totally rebounded difference of height between right and left wheel is bigger than stroke of coilovers. If so, force generated by spring isn't the same during the tilting as during bounding two springs, wich can cause my problem. If I'm wrong please correct me :)
Anti-rock swaybar is the last option - if I won't be able to deal with the problem in other way I'll get one.
 
I thought you already know that there is a amount of lever in the axle with your coilovers far from the ends of the axle .. a good config let you with your tip mounting at the center as you already have but the lowers out . . close to the wheel ( as close as you can ) something like / \ setup ..

Or just move both mounting points outside of the frame .. that will give you the same wheel rate that you have right now ( keeping 'em close to vertical 90° )

Coz if you more only the lower point .. you will loose parte of the spring rate due to the agled forces involved ..
 
i know that lower mounts should be as close to the wheel as possible. Unfortunaetly after making the suspension we decided to widen the car. Should I move only lower mounts, or upper as well if I want to stabilize the car as much as possible?
 
This picture was taken before widening the car, thats why it may look so. This one was also taken before widening the car. I am the guy that is talking to the driver. I'm 70" high, as you can see I am not standing straight, and griver who is 75.5" has his head lower than mine. We decided to make roof a bit higher, so the car is safer during the roll-over.
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What should be the angle between axle and coilover?
 
If you search Pirate4X4 I think they have a link calculator posted. I don't know if it addresses coil angle though. I know it has roll info which might help you figure out what is going on.
 
Ok, I'll try to move lower mounts as much to the side as possible, and move upper ones so coilovers will be a bit / \.

Can you tell me how stiff springs I should have in this car if it weights 3000lbs (in N/mm or lbs/inch). I know that I wrote that I tryed putting stiffer springs, but I am not sure if they are stiff enough. Today we remaped the engine and car is very fast, but during the turn I was very scared :bang: I'm afraight that moving mounts won't be enough:confused:
 
I do know this way of counting, but I am not asking about the stiffness of the spring which is needed to keep the car on assumed height. I'd like to know how stiff the springs should be to keep the car on the road during the turn:steer: Ride height is adjustable, bound to rebound ratio isn't the most important thing for me. I just want to be able to go fast without being scared for my life :)
Maybe my questions are noob for you, but my previous car was made of junk, had springs from Audi 80, shockers from mercedes 208 and did the job without any counting. Now I can feel that new car has bigger potential but when I counted it in the way that the coilover is bounded 4" the car doesn't drive well. Coilovers are 12" travel. Could you tell me how many lbs/inch springs are good to a start for the new suspention set up :)
Thanks for being so patient and answering my questions:cheers:
 
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