Need help staying on the bars down the straightaway

[let-r-eat]

So if I block up the left rear on concrete blocks I can't go up on the right front and lower or raise the right front?

[junebug]

If u make lr where its solid on the bars correct rf will only go down if u try to jack up the rf the spring will compress very little if any before it starts to pick up tire...

[junebug]

If u block lr up on concrete blocks yes u can raise the rf but that does not simulate on track conditions...the only way to simulate the on track conditions is tight the lr til the chain is tight and then put a jack under the rf lower control arm...and check and see if u get any travel before the rf tire starts to come off the ground

[JustAddDirt]

depending on track configuration (he says paperclip) crate cars do not have near the same torque to keep the lift arm loaded like a super, therefore they will settle down off the bars, unless they change chassis setup to keep it up. maybe more rebound in 5th coil shock. more compression on LR, more rebound on RF. could also be too soft, or stiff on lift bar spring, or maybe location of lift bar coil over.
numerous things to try, and change. just do one at a time and see what works and what doesn't.
Heck I have seen supers fall down off bars at Florence Speedway, but they still have more than enough straight away speed, just looks like it may make corner entry a little hairy.

[Dragoon55]

The frame is solid...it does not bend(minus the little bit of chassis flex u get)...if u have a solid piece of tubing which is what a frame is when u push down one corner the diagonal corner has go to come up...the only possible way for the lr to go down and the rf to stay down is if all four corners are down(which is doubtful)...or if the racecar is bending ATON in the center of the x...which I sure hope isn't happening...it's physics.

Its incomplete physics. For the "X" to come into play the way you are describing you must have a solid pivot point, but you don't. Most cars barely even sit on LF spring and the RR needs a chain to keep it loaded, so its completely possible for the LR to fall without the RF lifting. These cars mostly run around on the RF, the LR and the j-bar. You make it sound like if you dove off in the corner and the RF suspension broke the LR would simply tilt up off the track and be in the air, but it won't because the LR has its own suspension.... Todays cars don't use the old "X" philosophy much, they are a series of crutches and half baked engineering masquerading as "High Tech". Its excessive loading combined with excessive axel misalignment.

[let-r-eat]

half baked engineering masquerading as "High Tech". I like that.Marketing plays a big role in everything involving the $$$.