Hi, Just wanted to share my remedy for bump steer on my buggy do to large front tires as well as less than perfect geometry on my buggies front suspension. I got a regular truck steering damper from my local auto parts store and attached one end to the frame and the other to one of my tie rods. This all but eliminated my before pretty severe bump steer problem, but is still very easy to steer. See Picture. Hope this can assist someone as it did me.

now thats a good idea

That is an excellent idea, but it did absolutely nothing to correct bump steer....It dampened the steering yes....

Ok for those that do not understand bumpsteer....

Bumpsteer is when the steering wheel does not move but the tires do, this happens from inacurate front steering geometry...In other words the pivots arent were they need to be, it is nearly impossible to remove bumpsteer 100%, but the key factor is reducing it to near nothing, and having it at full droop, or full extension on the shock, say when the car is airborne.....If its at the top when you hit a bmp the car will want to steer in the direction the tire has moved....

But the steering damper is still a good idea, im guessing the only reason the car needs a damper, i assume the steering wheel jerks on you, this is most likely caused from scrub radius...Thats another topic all on its own....

That sounds more like it, the wheel jerks but buggy does not seem to wander when it hits a decent bump. Thanks for the clarification.

G-man,
Your bump steer is not in your steering, but actually in your control arms... If you look at the paint and measure your front end your uppers are at a different angle than your lowers are so when the suspension compresses it pushes the top of your upright out...thus making the tires toe in... If you raise the "frog" steering arm slightly and lengthen the tie rods this will help some...Look over the paint and you'll see what I'm talking about...the closer you can get ALL the angles and lengths to the same as eachother the less bumpsteer you will have

How much caster do you have?

theo

Thanks R-Man for the info. That makes sense to me. Theo I do not know my caster. How should I check?

It's the leaning back of the top of your spindle. This could be part of the problem, especially when you pick up speed.

G-man,
no problem

Theo,
Are you saying that negative castor is causing the bumpsteer?
You should be running at least 4* negative castor...I run mine at 15* rake on the control arms and 10* on the up right... And a KPI of 8*...Posative castor will make it twitchy at all speeds... toe in and toe out in excess will make it darty at higher speeds...I have found the a couple of degrees of toe out work really well on the track (oval) but sucks at 70mph down the trails I don't have any pix that show this well, but I think Bug does,my puter chashed in dec. and lost all files up til then and the 750 isn't that far along yet