Visit The Dirt Forum for More Information

Author Topic:   clamped LR
driver27
Dirt Full Roller

Total posts: 40
posted June 04, 2002 08:01 AM
Ok, Ive heard alot about clamping the left rear, and Im not exactly sure what it does and why. My car is a swingarm with upper z links. I assume that one clamps the left rear by unhooking the upper link and placing a bolt monted solidly to the axle tube in its place, thereby making the normally floating left birdcage solid. I race on a track in the south that normally gets very hard and slick. Is clamping someting to try on a track like that? If so, what other changes need to be made, such as spring rates, when trying a clamp. Thanks for the input guys, just trying to figure this car out a bit .

For those that may remember my post earlier on skating the rear end, it seems that taking some pullbar angle out, and softening up the rear springs a bit helped significantly. What is a good indication that you have taken too much angle out? Just need to go a little more in that direction I think, good call Custom!!

As always, Thanks Guys.

Van

CUSTOMPERFORMANCE
Dirt Freak

Total posts: 464
posted June 04, 2002 10:45 AM
Glad to be of help. Happy it is getting better for you.

driver27
Dirt Full Roller

Total posts: 40
posted June 05, 2002 06:53 AM
I appreciate the help custom.

Anyone got any ideas on the clamped lr part of my post? I assume that this is for dry slick types of tracks, which is waht i race on.

Thanks

bigfella72
Dirt Roller

Total posts: 6
posted June 05, 2002 09:00 PM UIN: 182072
Driver 27
We race on a very slick hard track and had big problems hooking to the surface. We talked to the point leader and 3 of 4 feature winner and he said what he does at the track is clamp the LR. We did it too and we took 2nd when we usually were 9th or 10th. We actually beat him. It puts an unbelievable amount of weight on the LR, anytime the bars move, the tire is pushed into the track. As good of bite as you can get on a slicked over track. I recommend anybody doing it. We're gonna leave it alone for the rest of the year.

driver27
Dirt Full Roller

Total posts: 40
posted June 06, 2002 07:41 AM
Ok Bigfella, what type of rear suspension do you have, and did you have to make any other changes. Exactly how did you go about clamping it?

Thanks

WPP
Dirt Maniac

Total posts: 162
posted June 06, 2002 08:28 AM
I had always heard not to clamp the rearend if there was no traction on the the track. When you clamp the rear it make instant traction and pushes the tire to the ground but there has to be traction on the track to work has anyone else heard this

wfoondirt
Dirt Freak

Total posts: 242
posted June 06, 2002 04:28 PM
wpp i believe they are talking about taking the top bar off and locking the b/c. What is typically refered to as clamping is what you are speaking of, mounting the spring to a bracked clamped to the rearend. I've never been a fan of locking the b/c, i have found i can make the car better with the z-link intact. Basically what locking the b/c does is make the lr act like a 3-link.

What i did to lock the b/c was to weld tabs on the rearend that lined up with the top hole of the b/c and then put a bolt through the bracket and the b/c. Other than that you may have to change the angle of your lower bar, typically it should be at about 5 to 10 degrees depending upon the mounts. I should mention that i left the above mentioned brackes off my car this year. If you want the simplicity of a 3-link on the lr you might try a wishbone (or spear rod as the l/m guys call them). It allows the rear-end to remain floated but is simpler to understand.

WPP
Dirt Maniac

Total posts: 162
posted June 06, 2002 07:40 PM
WFO I have always run a swingarm-zlink with the springs on the swingarm i have just got my new car about two weeks ago and it is a dirtworks 112 wheelbase my old car was a home built chassis with a swing arm suspenion 108 wheelbase the left rear on my old car had a bracket welded on the swingarm were you removed the upper bar that went to the rear and hooked a short bar to the swingarm from the birdcage with the left rear spring on a clampbracket but i never did run this when i had the car i never did really understand it but the swingarm was still hooked to the bc the only differce was it had a short bar hooked to the bc on top that hooked to the swingarm when you removed the rear bar what could this be called spear rod home made or what if you know could you please tell me or that goes for anyone one thing it still floating

Back to the Archives