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Author Topic:   Lifting Left Front
Wipe Your Feet
Member
posted May 29, 2000 12:17 PM
What kind of spring setup and where are they located? This is where he is getting you I bet.


Wipe Your Feet
Member
posted May 29, 2000 04:53 PM
Depending what the guy is running that you want to beat. He is basically burying the left rear tire to get off the turns to do it. Increasing your wedge percentage will help some. How much pinion raise are you getting off of it when your on the gas? Witht the springs mounted directly on top of the housing, its hard to get the lift that your looking for. Therefore, if you want to keep what you have and not change it, the static weight change in the cross will be your best bet.


CHASSISCAT
Member
posted May 29, 2000 07:38 PM
The reason this guy's carrying the LF is through a drastically different amount of anti-squat at the LR. Having run a 3 link that sounds like the one you're running, I was unable to obtain any decent amount of anti-squat without wildly increasing the rear steer of the car. The reason being that your anti-squat is wholly dependent on the relationship between the angles of your trailing arms and your torque arm length. If you shorten your torque arm (move the fifth coil back), you could increase anti-squat but with you're trailing arms as long as they are, the line between too much anti-squat and not enough becomes very thin.

I'd bet a week's pay that the guy you're chasing is running a 4 bar or a z-link car with lower arms around 14-16", possibly shorter. These rear ends allow for a LOT of anti-squat without drastic changes in rear steer characteristics. With this style set-up, it's very easy to get your car to carry the LF, but even better to set it up so that under hard acceleration it's right on the borderline of picking it up, but not quite.

There's a car builder around here that's been running away with most of the big Mod races the last few years, and what he's doing is setting his cars up with a lot of rear steer, but also with upwards of 300 pounds LR bite, and 57-58% cross. I've seen these numbers on one of his set-up sheets so I know they're true, but what I don't know is the amount of rear steer we're talking about without actually spending a lot of time measuring arm lengths and angles, etc.. Incidentally, these cars are on 4 wheels ALL the time.
I think the theory is quite sound, and having been beaten by too many of these chassis I've been quite tempted to go real drastic with mine and try to chase that style of set-up...but it's just hard to start a whole new learning curve.
The 3 link kind of offers itself to this style of set-up, so quite frankly, if I still had mine I think I'd surely be chasing it right now.

sorry for rambling...
Matt



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