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Rubber Bushing on Limiter Chains
I have Limiter Chains on both my Right Rear and Left Rear of my Lazer Chassis by Bernheisel. I have both chains mounted solid on chassis and rear end and im thinking of putting rubber bushings on them does any one notice much of a difference between having them mounted with rubber or soild? I have always run them solid...
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I have my chain on a rubber bump stop. Less shock in the suspension is always going to be better if you ask me.
Dave
2012 UMP Stock Car National Champions.
2013 UMP Modified Rookie of the Year
2014 Kankakee Speedway UMP Modified Champion
2016 Fairbury American Legion Speedway UMP Modified Champion
2016 Kankakee Speedway UMP Modified Champion
2016 UMP Modified, Northen IL Regional Champion
2018 UMP Modified, #2 National Points Standings
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Only time I wouldn't run one is if you were a clamp car. The rubber has some give to it and it wouldn't be hard to over index a clamp car. Jmo
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Originally Posted by LKissinger8
Only time I wouldn't run one is if you were a clamp car. The rubber has some give to it and it wouldn't be hard to over index a clamp car. Jmo
Intresting.
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Originally Posted by LKissinger8
Only time I wouldn't run one is if you were a clamp car. The rubber has some give to it and it wouldn't be hard to over index a clamp car. Jmo
Just curious, what does it matter it matter if the spring is clamped in front or on the birdcage behind?
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yes that is strange.... can you explain that one to me?
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Originally Posted by LKissinger8
Only time I wouldn't run one is if you were a clamp car. The rubber has some give to it and it wouldn't be hard to over index a clamp car. Jmo
I also find this strange. Geometry that would encourage over-index would be more beneficial on a lr behind deal than a clamp car, IMO. Birdcage index has no impact on wheel rate with a clamp car. All that matters is steer and thrust angle.
Modern Day Wedge Racing
Florence -2
Atomic - 2
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what im getting at is that the rubber bushing is goin to have some give when the car is on the chain. clamp cars are very sensitive to over indexing if you go over a set bar angle. so say your car has 43 degrees lr upper bar and on the chain and you have a rubber limiter, you hit a hole or the car hops up on the bars fast that rubber will have some give so you may have 45 degrees upper bar angle and if youre on that edge of over indexing already you just went over and the birdcage is over indexed.
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Clamp cars aren't anymore sensitive to over indexing than a spring behind car. If the suspension is close to over indexing, adding a biscuit could push it over the edge no matter what. Spring location has relatively zero effect on birdcage indexing. Think about it.
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clamp cars are hard on chains and shocks due to the clamp rolling into spring, which is a bit more violent than a spring behind, if you have to get on and of throttle.
in my experience clamp cars do not need the upper and lower LR bar angles a spring behind car does, due to the rotation forces of rear end on spring, and the lift applied to chassis.
But with a spring behind car, you typically have to keep car on bars to keep traction.
Clamp cars general speaking do not have to stay on bars, and when let down on corner entry, when throttle is applied, it typically reacts very fast and tops out quickly. a rubber biscuit would aid in the initial hit of a chain.
Just have to watch how much biscuit compresses, to know how much to compensate with in the length of chain.
Just my 2 cents
I think there should be lifeguards in the genepool.
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