Quote:
Originally Posted by ccracin
First let me say I am not overly familiar with the differences between generations of Vette IRS designs. I am merely speaking from looking at general geometry.
What you are talking about with one design squatting and the other not has to do with the percent ani-squat built into each design. Anti-squat is independent of torque reaction. This is completely geometry dependent. The theoretical convergence point of the 2 links forms the Instant Center. The location of this instant center in relation to the CG is one of the factors that go into this calculation. With this in mind if you look under the newer car as you state both arms are point up to the front of the car. On the older design or single arm design this angle is not as steep. With the 2 arms pointed up to the front, when the tires start to roll forward and push the chassis the tires are forced down as they try to drive under the chassis. The reaction to this is actually trying to lift the chassis to some degree. This counter acts the reaction to the torque being applied to the center section. This reaction is trying to lift the front end of the car and because of the moment arm length, the rear goes down. The center section and it's mounting are the only components that are affected by torque. Without this angle, there is less to counter act the torque being reacted from the center section so the rear squats.
These are just my thoughts on what you are seeing. Suffice it to say, I still believe your links will be in compression during acceleration. So, as you are accelerating out of a corner with body roll involved you will be loading those links in compression and bending. Is it going to be a problem? Don't know. Could it be? Yes. Were it me I wouldn't take the chance and just tweek the bar design a bit. I attached a quick sketch of how maybe to change the swaybar mount to stiffen the bar and not worry. Anyway, please don't take any of this as more than some interesting conversation. I love talking about this stuff. Keep up the great work!  |
Holly crap I can't believe I forgot about this. Just got cough up in work and it went to the back of my head.
But the way I understood it was that the torque reaction trough the diff on a live axle was why the the instant center of the froward arms was pushed so far back in the car, closer to the center than the front of the wheels. So I thought the torque reaction would transfer through the cv or half shaft and would influence the anti squats location because of that transfer. Is that off track?
-Russell