chassis question

[porkchop4]

What would keep a car from getting up on the bars...a guy that races around here said his square tubed car wouldn't get up on the bars but his round tube car will. Why would that make a difference over a round tube car?

[Matt49]

Short answer is tubing has nothing to do with it.
If a 4-bar car with shock/spring behind the LR isn't hiking up it is because something is in a bind or seriously out of the ballpark on setup (e.g. j-bar way too flat).
The drive shaft could also be bottoming out in the transmission. This is a common mistake.

[porkchop4]

So if the shock is in front of the rear end it won't hike up

[Matt49]

So if the shock is in front of the rear end it won't hike up

The shock/spring behind the LR makes it hike up much faster (which is one of the reasons most people run it there). Having an additional shock in front (without a spring) can slow it down considerably if there is too much rebound dampening.

My point was that the fact the car is square tube vs round tube has nothing to do with chassis hike.

Something is limiting the travel of the car and it can likely be found in the shop. Just put a jack under the left side of the chassis while the car is sitting on the ground and jack it up until the LR tire starts to come off the ground. If it comes off the ground before you get your desired amount of on-track chassis hike, something is in a bind or the drive shaft is bottoming.

[3wheelinphotos]

Our sqaure tube Warrior house cars runs just as good as our round tube house car...

[StuckInReverse]

Something is limiting the travel of the car and it can likely be found in the shop. Just put a jack under the left side of the chassis while the car is sitting on the ground and jack it up until the LR tire starts to come off the ground. If it comes off the ground before you get your desired amount of on-track chassis hike, something is in a bind or the drive shaft is bottoming.

Listen to Matt's advice. It's the most straight-forward method for finding the issue!