Birdcage bar positions

[Kromulous]

Ok, wow thats some compression, i'll check the dyno numbers on what we got now and see if i am close. I cant remember.

Right now i am working on making the top bar shorter, its on a zero index deal and the top bar is 18.5" long, i want to get that down to 17" at least while on the zero index. I am hoping to get the car to traction up faster, more would be good, but i really want a faster reaction.

[MachineMasters]

Ok, wow thats some compression, i'll check the dyno numbers on what we got now and see if i am close. I cant remember.

Right now i am working on making the top bar shorter, its on a zero index deal and the top bar is 18.5" long, i want to get that down to 17" at least while on the zero index. I am hoping to get the car to traction up faster, more would be good, but i really want a faster reaction.

Valving like that would only be suggested as LR coilover behind with no shock in front. It's a lot of shock but if on a soft spring with nothing in front it doesn't feel that stiff.

Quicker traction on the LR - i feel like this is related to LR static bar angle, with more angle making things happen quicker. Also feel like the 5th coil position (front to back) has an effect with quicker happenings as you move it back. Might not be "correct" but what I've felt.

[billetbirdcage]

You need to keep something in mind when dealing with Shock numbers especially LR:

While most cars the axle may travel at a certain speed on average, the actual shock speed can be dramatically different depending on what the cage is doing. Meaning if the cage is actually indexing a lot or very little. This goes back to terminology (the whole no index term), a true no index is not the same as the referred no index (actually more like "no over center")

Say the axle moves 4" on the LR and it's traveling at 4" per second: Now with a normal cage set up (cage actually rotates or indexes) then the LR behind shock is not traveling at 4" per second until it gets close to ride height but when it first starts to drop it can almost move none (could be close to 0" per second) or semi close to that 3-4" range once the car sets down closer to ride height. Where on a true no index (cage does not rotate) then it will move at roughly 4" thru it's entire travel.

So that can be a huge difference in how stiff the shock acts on different LR cage set ups.

[Kromulous]

What's you guys opinion on a car that needs 350 to 400lbs droop load to make any traction?

I keep thinking something is off elsewhere, design or ?? This is the reason i want to shorten the top LR rod to see if it will help, and i can decrease the load. It messes with my deck height having so much load, but it is what it is i guess.

On my set up, i am traveling the spring 4 3/4" from ride to full droop. I am going to check how much angular rotation i get in that movement on the Birdcage.

[cjsracing]

What's you guys opinion on a car that needs 350 to 400lbs droop load to make any traction?

I keep thinking something is off elsewhere, design or ?? This is the reason i want to shorten the top LR rod to see if it will help, and i can decrease the load. It messes with my deck height having so much load, but it is what it is i guess.

On my set up, i am traveling the spring 4 3/4" from ride to full droop. I am going to check how much angular rotation i get in that movement on the Birdcage.

That seems like a lot. I start at 200ish and I have throttle push with that in qualifying.

[MachineMasters]

That seems like a lot. I start at 200ish and I have throttle push with that in qualifying.

Agreed.. i've never been over 185, usually 100-150.

maybe the RR is too stiff and it takes a lot of LR to make it feel tight enough