rear panhard bar tech

[washeduptoo]

IMO body roll doesn't have to create side bite, but side bite does create body roll. Again, JMO and best of luck.

[Anonymous24]

Actually from what I have read is body roll doesn't permote more traction on the RR tire. Correct me if I'm wrong.

No correction needed.

[let-r-eat]

I'm glad you have such high credentials. Could you divulge into the mechanical concepts that justify this? Why would we want to restrict the placement of the rear roll center when we don't have to? The rulebook isn't limiting us?I see no reason to couple the front and rear roll centers in anyway. Providing optimal slip angles for the intended configuration doesn't require us to limit our adjustability.. I'll let Chad Knaus and Chip know they might as well weld up those adjustable mounts. Is their an optimal position for a particular slip coefficient? Sure. Does it change constantly? Sure.I'll take adjustability.

[propit21]

I enjoy these thread great learning, am going to go ahead and take the bait. We found by adding angle in the j bar when the track went dry and slick, it helped with side bite in on entry and middle, considering your panhard bar/j bar doesn't have much effect on exit.

I didn't go to college to become a engineer or do I think I know that much about chassis dynamics so am just going off what the driver have told me and what we have done and seems like it helped. I would love to know other adjustments to make.

What I've have heard or read is that the angle in the bar works as leverage of weight from left to right. You can also move statically your rear roll center up or down or left to right depending on where you mount you bar, angle, or how high or low it is. (Other things also play a part as well) So an easy adjustment for us if we need more "side bite" is just just add angle in the bar whether right or wrong we feel we get good results from that adjustment, it's also easier then moving ballast for us.

[redracersmod]

I moved my panhard up on the frame and left the rear end location the same it seemed to loosen my car.

[Anonymous24]

I'm glad you have such high credentials. Could you divulge into the mechanical concepts that justify this? Why would we want to restrict the placement of the rear roll center when we don't have to? The rulebook isn't limiting us?I see no reason to couple the front and rear roll centers in anyway. Providing optimal slip angles for the intended configuration doesn't require us to limit our adjustability.. I'll let Chad Knaus and Chip know they might as well weld up those adjustable mounts. Is their an optimal position for a particular slip coefficient? Sure. Does it change constantly? Sure.I'll take adjustability.

You are taking an orange and comparing it to an apple. Us dirt racers don't run 500 miles in a single run. They don't have time to changes like we do in between runs. NASCAR pit stops are around 15 seconds. Its very hard to make changes to other components in a timely manner. So they are very limited on changes they can make to improve handling. Air pressure adjustments, spring rubbers, and track bar movement is about all the "quick" adjustments they can make. Adding/removing wedge, shock changes, adding ballast, etc. all take too long. Like i stated above, you can't compare an orange to an apple and expect it to be the same. Both fruit, both spherical in shape, both completely different.

[let-r-eat]

I'll just agree to disagree. I'll select adjustability. You won't see any non adjustable mounts on my panhard bar anytime soon unless the rules require. Apparently your racing somewhere I know nothing about.

[dirtplay18]

I run a mod with a rules package similar to an imca sport mod, solid pullbar, panhard bar behind rear end. Contrary to everything I've read, when I raise the bar on the frame (left side mounted) it tightens the car. My rear housing bracket is not adjustable, but I'm going to change that and see if I can gain anything from it. I don't think you can ever have too much adjustability in a race car.

[Dirtrunner35]

What ever adjustment you do at one end of the car the opposite will happen at the other end.

[redracersmod]

Well still no one has answered my question directly. Is this one of those that it affects every car differently there is no right or wrong answer and that's why you see so many answers saying the same adjustment did the opposite?

[MasterSbilt_Racer]

Well still no one has answered my question directly. Is this one of those that it affects every car differently there is no right or wrong answer and that's why you see so many answers saying the same adjustment did the opposite?

There is no one right answer. As there isn't for most things in the chassis tuning world. Raising the j bar on the frame will tighten your car if it isn't too high already.

[el paso mod 19]

Are you saying that if you already to high on frame, that if you raise it more it will make car loose. Just trying to understand. Thanks

[redracersmod]

I have checked several setup adjustment guides and they all say raising it will loosen the car. The same could be said for just raising the frame side as this Will raise the roll center slightly. That is my thinking on it.

[MasterSbilt_Racer]

I have checked several setup adjustment guides and they all say raising it will loosen the car. The same could be said for just raising the frame side as this Will raise the roll center slightly. That is my thinking on it.

Raising on frame only affects average height and angle. Those two things are having opposite effects. That is why it gets tricky.

[drtrkr244]

I think you are reading the adj. guides wrong.

Grt and Shaw both say to raise panhard bar on frame to tighten entry, which from my experience is correct.