Pullbar vs lift bar

[Lizardracing]

Also consider the spring or biscuit style pull bars typically allow more rear axle rotation and therefore, significantly more Panhard bar travel on the pinion end as well as moving the axle left/right at attitude.

[Kromulous]

Nowadays with the Pull Bars you will see a spring / rubber combo, and travel is usually an inch, to 1 3/8s or so max.

The rubber biscuits are better because they dont rebound so hard. Rates can be up in the 2200 lbs range at max travel.

[billetbirdcage]

Nowadays with the Pull Bars you will see a spring / rubber combo, and travel is usually an inch, to 1 3/8s or so max.

The rubber biscuits are better because they dont rebound so hard. Rates can be up in the 2200 lbs range at max travel.

Yes, but no matter if it's a solid pullbar, the rear end pulling forward under hike makes the pinion rise more then a torque arm in most cases. The closer to the rear end the pullbar is the more it pinions up from the rear end moving forward. Not that is right or wrong, just different and they have different dynamic J-bar rakes, dynamic left to right rear end positions, on gas vs off gas.

[KTMLew]

Yes, but no matter if it's a solid pullbar, the rear end pulling forward under hike makes the pinion rise more then a torque arm in most cases. The closer to the rear end the pullbar is the more it pinions up from the rear end moving forward. Not that is right or wrong, just different and they have different dynamic J-bar rakes, dynamic left to right rear end positions, on gas vs off gas.

I'm really surprised this much discussion about pullbars. I'd assumed it was long gone tech except for mods. THIS is why I come here. Love the tech stuff.

[Henry Every]

I think I already said what I'm willing to say. There isn't a perfect car out there. When cars were toting the LF a mile high and winning, those cars were terribly flawed. Winning didn't prove the guys building them had a great grasp of vehicle dynamics. If the gas pedal has a big impact on your cars anti squat, your car is not as consistent as it can be and is very dependent on the driver to be perfect. People put pullbars on modifieds because people have always put pullbars on modifieds. Not all do it anymore, but there are still a lot of them. It's no different than when I was told I was an idiot for advising people to not mount their brakes on their birdcages. Since Bloomquist did it successfully, it had to be a perfect setup. Success is often achieved by talent and in spite of some part of a car's assembly. Eventually, someone who is fast enough does it the right way and the crowd follows. 99% of the people have no idea why they changed, they just do it.

Very well put. Seems like Joe Garrison was opposed to pullbars with 4 link too. I like pull bars, but I also like swing arms and/or most z-link suspension arrangements as well, but like you said having a pullbar with 4 link is just too violent to be consistent. Suspension setups are a system, or a package if you will and trying to do it "a la carte" is not usually a great result. You can end up with too much of a good thing, when balance delivers more speed. JMO.