Baer bump steer kit question? (pic)
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From: CISSNA PARK, IL
Baer bump steer kit question? (pic) hey guys........
does anyone know if these are recommended for a mostly drag car? or if they will at least give a positive result? the car will have a tubular k-member, uppers and lowers, p/s, and drag shocks/springs. the car will see some street duty, but limited.
thanks,
Dave
click pic for a larger image
does anyone know if these are recommended for a mostly drag car? or if they will at least give a positive result? the car will have a tubular k-member, uppers and lowers, p/s, and drag shocks/springs. the car will see some street duty, but limited.
thanks,
Dave
click pic for a larger image
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From: Columbus, OH
bump steer is when the nose of the car darts in a different direction than that in which you are turning because of the suspension moving over bumps... at least that's how I interpret it. For a drag car, I doubt the bump steer kit would be very useful for you.
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From: CISSNA PARK, IL
how about coming down from a wheel stand???????? 
that can be quite a bump from what i've seen on some cars! perhaps it can help the car settle better and retain going in a straight line as the front end first touches back down?
thanks,
Dave
that can be quite a bump from what i've seen on some cars! perhaps it can help the car settle better and retain going in a straight line as the front end first touches back down?thanks,
Dave
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From: Columbus, OH
My understanding is that it's more designed for the autocrosser. The only time I've noticed bump steer (albeit very minor) is when going around a turn and hitting a bump that unsettles the front end. When the front end lifts, the car steers right of the line I was on. When the front end dips below settled it steers left of the line. I doubt it would help in a wheel stand situation unless you didn't have the wheels straight to begin with.
I believe most--if not all--the usage for bump steer kits is during a turn, when the suspension compresses and rebounds. It's at this time when you look for the arc of the suspension arm to be level with the arc of the tie rod.
I'd be interested to know if these kits will benefit daily driving. Because even going through canyon passes at casual speeds may require some sort of bump steer kit.
I'd be interested to know if these kits will benefit daily driving. Because even going through canyon passes at casual speeds may require some sort of bump steer kit.
With a lot of positive caster, as the suspension compresses, the knuckle does not move straight up and down.
With a fixed steering rack and the tie rod ends moving up and down, an arc is created, effectively lengthening or shortening the relative distance between the rack and where the tie rod attaches to the knuckle.
When both sides of the suspension compress, like under braking, looking from the side of the car, the suspension will travel back towards the driver. Looking straight down on the car, the wheels will turn towards each other very slightly, creating more toe in. The tie rods move above a level plane and shorten the relative distance.
While turning, with one side of the suspension compresses while the other droops, lessening the steering input.
When a car's ride height is lowered, the plane on which the tie rods were set now changes and bump steer can be worse. The kit referenced above, allows the tie rod ends to be adjusted to get the tie rods level once again.
The more suspension travel one has the worse the effect. Massive articulating suspensions, like on 4x4s can see great benefits from these kits. And, if one is racing for points/prize money on a road course, it might be a good thing.
For a street car? Don't waste your money ....
With a fixed steering rack and the tie rod ends moving up and down, an arc is created, effectively lengthening or shortening the relative distance between the rack and where the tie rod attaches to the knuckle.
When both sides of the suspension compress, like under braking, looking from the side of the car, the suspension will travel back towards the driver. Looking straight down on the car, the wheels will turn towards each other very slightly, creating more toe in. The tie rods move above a level plane and shorten the relative distance.
While turning, with one side of the suspension compresses while the other droops, lessening the steering input.
When a car's ride height is lowered, the plane on which the tie rods were set now changes and bump steer can be worse. The kit referenced above, allows the tie rod ends to be adjusted to get the tie rods level once again.
The more suspension travel one has the worse the effect. Massive articulating suspensions, like on 4x4s can see great benefits from these kits. And, if one is racing for points/prize money on a road course, it might be a good thing.
For a street car? Don't waste your money ....
