Visit The Dirt Forum for More Information

Author Topic:   what is too much cross weight?
bh74
Member
posted June 01, 2002 11:58 AM
what does the cross weight do to the handling the car. we run about 50.5% cross, and about 60% rear with about 52% left. I have notice as me have made changes our cross weight has changed some to something like 48.5%. just wondering what difference this made to the way the car handles.


2nd2none
Member
posted June 02, 2002 04:36 PM
more cross weight percent will tighten car up coming off corner and free it up getting in. opposite for less cross weight.


bh74
Member
posted June 02, 2002 08:12 PM
Does it have in effect on the way the car enters the corner?


2nd2none
Member
posted June 02, 2002 09:23 PM
yeah if you are running alot of cross when you get off the gas going into the corner it will unload the LR and will loosin the car. If you've noticed a decrease in cross by 2 percent you'd prolly not notice a whole lot difference getting in but would make car a little looser coming off the corner

[This message has been edited by 2nd2none (edited June 02, 2002).]

bh74
Member
posted June 03, 2002 10:50 AM
O.K. THANKS, WE HAVE NOTICED THAT IF WE DON.T HIT THE CORNER RIGHT COMING IN, OR HAVE TO STAY OFF THE GAS TOO LONG THE CAR WILL PUSH ALL THE WAY TO THE WALL, BUT IF WE HIT IT JUST RIGHT THE CAR WILL FLY. IS THERE ANYTHING TO MAKE THE CAR MORE CONSISTANT THROUGH THE CORNER?


wfoondirt
Member
posted June 03, 2002 01:18 PM
Increased cross only loosens entry if the car is slowed mainly with the rear wheels or if the car is in yaw on entry. If the car is driven in the corner straight with near equal braking force front to rear increasing cross will tighten the car. The above statement of increasing cross loosening entry is a generalization of dirt racing but isn't true in all cases.

Sounds like to me your car is too tight on entry and the driver compensates by "backing" the car in. Without further info on your setup its hard to make any suggestions.

bh74
Member
posted June 03, 2002 03:20 PM
WE DO RUN MORE REAR BRAKING. OUR SET-UP IS 850LF-900RF, AND 200LR-150RR. WITH ABOUT A 100 PDS. OF LR IN CAR. RIDE HEIGHTS ARE 6-3/4LF AND 7-1/8 ON THE OTHER CORNERS. IT IS A HOT CHASSIE WITH THE BISCUIT PULL BAR, ON THE TOP HOLE W/ 1/4" COMPRESSION. TWO FRONT TRAILING ARMS ON THE TOP HOLES WITH A 1/4" LONGER ON THE RR. JUST ADDED THE 1/4" OF REAR STEER AND STILL THE SAME OLD PUSH. THE CAR WILL DRIVE CORNERS GOOD AS LONG AS YOU HIT THE CORNER RIGHT AND ARE NOT OFF THE THROTTLE VERY LONG.

THANK YOU FOR ALL THE HELP.

bh74
Member
posted June 03, 2002 03:23 PM
WE RUN A LONG PANHARD BAR ATTACHED TO CHASSIE ON LEFT AND AXLE ON RIGHT. LITTLE DOWNWARD ANGLE HAS WORKED BEST FOR USE. SHOCK TRAVEL IS 2 TO 2-1/2 ON LR AND 3 TO 4,4-1/2 ON RR.


wfoondirt
Member
posted June 03, 2002 03:51 PM
I am guessing this is a three-link car. The first thing i will usually try on a tight entry car is more front stagger, raising panhard bar and a stiffer lr spring. If it is indeed a 3-link you may also try lowering the rr trailing arm a hole, but thats hard to say not knowing for sure the angle of the bars.


bh74
Member
posted June 03, 2002 04:26 PM
YES IT IS A THREE LINK. WE RAN 1" OF ROLL-OUT THIS LAST WEEK-END, AND IM NOT SURE OF THE TRAILING ARM ANGLE, IF THEY ARE IN THE BOTTEM HOLE THEY ARE ALMOST PARALELL WITH GROUND.


SSMFAN40
Member
posted June 03, 2002 09:30 PM
YOU are the MAN WFOON!!!


Back to the Archives