Author Topic: Rear End Setup  (Read 7294 times)

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Offline TomC

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Rear End Setup
« on: November 05, 2005, 09:23:36 am »
*Rear End Setup*
Post by George Herrin on May 13, 2005, 3:51pm


On mowers I have found that a square (we cannot alter the wheel base)
and level transaxle or axle is the best way to go. If the front end is
setup as I explained in the front end section, it will drive well. Now
if useing a kart axle and transmission setup, it pays to put adjustable
bearing cassettes in your parts list. Mount them both where they adjust
up and down. If you twist a chassis and cannot get it to handle this
will allow some adjustability in it to bring the handle back. I have
adjustment on all 4 corners of my mowers, in five years I have only made
one adjustment once I have it handleing well. That was after a wreck, I
had bent a front clip just a bit and adjusted the spindle heoights to
get my setup back where I wanted it. If you are using a transaxle you
can shim one side up or down with washers between the transaxle and
frame mounting point. This is doing the same as an adjustable bearing
cassette.
George
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*Re: Rear End Setup*
Post by Tom on May 14, 2005, 7:41am


How about rear stagger? Where the LR will have a shorter rollout
(circumference) than the RR. Again this would be an LTO setup, but do
y'all do this, and when? We must do it on an LTO kart because the rear
wheels are fixed to a solid axle. Since the tire on the inside of the
turn (LR) has a shorter distance to roll than the RR, we usually make
the RR have about 1" more rollout. Otherwise the thing will push like a
tugboat all the way through the turn.

Pushing on exit sucks. It's when you get to see the wreck happen!
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*Re: Rear End Setup*
Post by George Herrin on May 14, 2005, 8:21am


All classes except FX must use the same size tire on both sides, in
other words if it says 16x7.50x8 it must say it on both tires. Also the
wheels must be the same. This is where air pressures come in. We can
control this with air pressures, I typical setup for me air wise is
10lbs both front wheels, and 6 left rear and depending on amount of bite
in the track anywhere from 10 to 25lbs in right rear. You can get 1 inch
growth out of a L/M tire easy. Now in FX its a different story we cannot
use offset in any class period but in FX we can use stagger. Many do and
we are allowed kart tires in FX only. And you can use different size
rims also as long as the measure fron center of frame to the outside
sidewall is the same on both sides. This is how we control offset in fx.
I really like all your technical questions Tom.
George
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