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Author Topic:   wheelbase differences...
dluna
Member
posted March 25, 2002 01:34 PM
we are running a 2" difference in wheelbase, less on the left side. we have a 2-bar car with rubber pull-bar and j-bar. the car will not hook up coming out of the corner, especially when it is dryslick. the car never pushes going in either (we are guessing mainly because of the 2" diff.). Do we need to lessen this diff. or even go less on the right side when the track is dryslick? Thanks!


wfoondirt
Member
posted March 25, 2002 04:28 PM
Typically dirt cars lead the rr tire, how much depends on the conditions, typically anywhere from 1/4 to 1". Trailing the rr by 2 inches could definately cause loose exit.


dirttrackracer
Member
posted March 25, 2002 05:12 PM
Put the rear in square and reset your percentages,you will be amazed.

[This message has been edited by dirttrackracer (edited March 25, 2002).]

CUSTOMPERFORMANCE
Member
posted March 25, 2002 07:21 PM
String the chassis from the lower ball joint grease zerks on the front lower a arms to the center of the rearend housing on both sides and see where the wheelbase is at before making any changes. One thing to keep in mind if you are going off the length of the rear trailing arm strut tubes and thinking the difference in length is how much longer or shorter your wheelbase is many cars are set with one side longer on the tube or shorter which affects rear roll steer in the motion and travel of the rearend in the corners. the rear would be square to the front with the difference in lengths.


CUSTOMPERFORMANCE
Member
posted March 25, 2002 07:23 PM
Most cars i have been around or worked on/built have run the best with the rearend square or no more than 3/8" lead in rr. Leading the rr is just a crutch to some other problem.


dluna
Member
posted March 25, 2002 09:06 PM
Thank you guys a lot for the HELP!

Now, another silly question:
I am gonna go ahead and guess that when we square up the rear-end, the car is gonna have a big time push (or hopefully since the car has never pushed before, this will be just perfect now that it is square) so can I get any quick advice as to what BIG changes to expect or to apply to the car for the first lap we get on the track this weekend. So far, I have 50 psi. in the rr tire so it will hopefully stretch to get more stagger. Other than that, I don't really know what else to change until we get on the track and see how the car reacts. Thank you all for your time.


G17RACING
Member
posted March 26, 2002 05:03 PM
DLUNA, CHECK YOU PRIVATE MESSAGES


millerlt3
Member
posted March 30, 2002 07:46 AM
I agree with dirttrackracer, square it up and put it on the scales reset your percentages and just make sure your cross weight is not abnormally heavy and you should be fine


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