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Author Topic:   Left side wieght
GnarlyCar
Member
posted July 26, 2000 11:20 PM
I'm having a bit of trouble this year, mostly with the heat races. I've tried just about everything you could imagine with my 4-bar to get it working in the tack, but it just seems to be just short of being competitive. I can get it working fairly well on dry-slick by loading up the RR with lead and fuel and running a bunch of panhard angle, pinning the RR tire and rolling the car through the turns, but the heats are the biggest problem. I think I've narrowed the problem down to lack of left side wieght because it's at it's fastest (on tack) when I pull the LR tire in as far as it can go and run all my lead over it and only enough fuel to finish the race, but it's still a little short. My fuel cell is mounted on the right side of the chassis, but if I relocate my battery box to behind the seat I can move the cell about 12" to the left. I'm currently at 51.7% left with a 2" wheel on the LR, and 52.5 with the 4" wheel. I'm wondering if those figures are consistent with what most other guys are running, and if not, what should they be? I know...this is probably pretty elementary for most of you, but it's never really been anything I could do much about until now, so I never really paid it much attention.

I'm thinking of building a slider type set-up that will allow me to move the cell all left or all right, and it wouldn't take a lot of engineering. Has anyone else run anything like this?? How did it work?? Was it worth the trouble??

Thanks for any help you guys can offer..
Matt


FIB-BIF
Member
posted July 27, 2000 04:13 PM
ARE U SAYING YOU R NOT FAST ON A HEAVY TRACK? IF THATS THE CASE , Y RUN ANY LEAD AT ALL. A DIRT MOD. CAR IS USUALLY PRETTY FAST WITH 52-54% LS WEIGHT. I HAVE BUILT ONE WITH 55.5% LS. WEIGHT, BUT IT WASN'T UMP LEGAL BECAUSE THE L.R. WHEEL STUCK IN TOO FAR W/ A 1" OFFSET, BUT IT WAS REALLYFAST IN A SLICK TRACK. MOST DLM'S HAVE AROUND 56% LS WEIGHT. MOST ALSO HAVE THE CELL IN THE MIDDLE OR ON THE LEFT. IF U WOULD SENT MORE INFO ON YOUR CAR, MAYBE COULD HELP MORE!!!!!!!!!!!!


lucky13
Member
posted July 27, 2000 11:09 PM
I sent you a private, but I forgot to mention that I put 1/4 inch lead (not lead weight) in the right rear, so the left side is 1/4 longer wheel base than the right. This really tightened my car up.

Hope this helps.

Bigdog
Member
posted July 29, 2000 04:46 PM
We run a 4link car and only have 50.4% left side without the driver but the only problem we have in the heat races when the track is tacky we can't keep the left front on the ground and it gets alot of people talking about motor claiming and all the other BS. Also we have another car that has the fuel cell mounted on lead clamps and you can slide it side to side about a foot and half total.


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