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Author Topic:   birdcage placement
I-B-RACIN
Dirt Maniac

Total posts: 132
posted October 05, 2004 04:01 PM  
Swithing over a 3 link car to a 4 link. Springs will be mounted in front of axle solid no sliders. How far in from the end of the axle tube or rotor do I place the birdcage(swing arm style floater) does the left one need to be closer to the center than the right seems a lot of cars have it this way. And same qustion with the spring. Rear end is set in car with the left side tires lined up Is this right or wrong (3inch offsets on both left side)

PEwaste
Dirt Roller

Total posts: 14
posted October 05, 2004 05:34 PM  
What your going to want to do is firstly...
get your rr spring on top of the housing
secondly...
what are your bar lenghts??? Basically your going to want to get the birdcage on there all greased up, put your retaining rings on it.. get your rear end on the springs and then put your trailing arms on it... index your bird cage so its straight up and down at ride height, and then from behind look at your trailing arms and get about 1/2 inch of inward rake in the arms.. going in towards the chassis from the rearend, not out or straight.. then put your rings on each side of the bird cage and your done

I-B-RACIN
Dirt Maniac

Total posts: 132
posted October 05, 2004 07:10 PM  
bar lengths are going to be 17.5 top 14.5 bottom. I under stand the .5 inch in but from what point on the rear I need to put new brackets on the frame were they need be. start with the bird cage how far from the rotor

Xtreme12x
Dirt Forum Champ
Total posts: 874
posted October 05, 2004 07:26 PM  
it really will not matter... get the left side about an inch off the brake bracket... what i was trying to imply in my post from pewaste, the most important thing is getting the inward angle on your bars...

I-B-RACIN
Dirt Maniac

Total posts: 132
posted October 05, 2004 07:29 PM  
thanks for the in put!!! any other suggestions??

imca35
Dirt Roller

Total posts: 17
posted October 05, 2004 08:34 PM  
was wondering... why the inward angle on the bars?

smayo964
Dirt Maniac

Total posts: 194
posted October 06, 2004 05:17 AM  
I agree on questioning the inward angle also. Most chassis manuals will tell you that you need to keep the bars parallel with the chassis since they are the items that are pushing it. Once you add angles to the setup, you're adding force at an angle vs. with the chassis. If I'm correct on what I've read, your trailing arm connection points should be within 10" of the end of the housing, or brake rotor. Anything more than that will cause erratic handling when in the corners. Hope that helps.

dirtywrench13
Dirt Freak

Total posts: 324
posted October 06, 2004 06:06 AM  
JUST GET THE AXLE WHERE U WANT IT,THEN LINE THE BARS UP SO THEY ARE PARALLEL OR TOED IN EVER SO SLIGHTLY.THEN PUT THE CLAMPS ON TO HOLD THE CAGES IN PLACE.

Kromulous
Dirt Forum Champ
Total posts: 796
posted October 06, 2004 08:37 AM  
I've read elsewhere, that toeing the rear bars inward (towards the front, or aft looking fwd) allows the rear axle to move further without binding the hiems up.

zeroracing
Dirt Forum Champ
Total posts: 1875
posted October 06, 2004 08:43 AM  
my lr is toed outward some. because as the car hikes up slightly like it is most the time, the bars are parrallel, so that means they can take the most force at that point.
when you run a j bar it happens a little bit but shorty bar will pull the rearend to the left, so if your towed in to start you will be majorly toed in to finish.

dirtbuster
Dirt Forum Champ
Total posts: 2007
posted October 06, 2004 08:59 AM  
I would run them so that at ride height they are either straight or toed in a little at the front. I run the z link bars pretty much straight ahead. The LR bars i run straight to maybe a 1/2" toe in in the front. Look at shyrocks cars, the LR bars are toed in about 1 or 2 at the front on the LR. Depending on what you are trying to do toeing them in will also give a little more rear steer as the car rolls over and the rearend moves left.

imca35
Dirt Roller

Total posts: 17
posted October 06, 2004 04:31 PM  
Thanks for the replies.. just wnated to make sure I knew what i was getting into before i finished my mounts for my 4bar

Chad
Dirt Freak

Total posts: 269
posted October 06, 2004 06:24 PM  
To get your rearend situated in the car, line up the left side tires at ride height. Then position the birdcages as detailed above. I run mine parallel at ride height.

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