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Author Topic:   handling at corner entry
Rooster08
Dirt Roller

Total posts: 17
posted March 29, 2004 12:29 PM  
If I relocated the battery from behind the drivers seat to the trunk over the right rear tire what effect will this have on the handling? If I am thinking correctly it will decrease crossweight, increase rear percentage and thus loosen the car on turn entry. Is this correct or am I missing it all together?

c21
Dirt Forum Champ
Total posts: 521
posted March 29, 2004 02:12 PM  
the effect on crossweight is unclear . Most cars I've worked with GAIN cross as you physically move weight from left to right in the rear ...... counter-intuitive yet true (try this on your own scales)

as far as increased rear loosening up entrance, it may (certianly once you are cornering).


keep in mind that if you run your brakes biased to the rear ..... a decrease in cross will most likely tighten your entrance (greater tendancy for car to turn on LR wheel as cross increases with a high rear bias).

c21

[This message has been edited by c21 (edited March 29, 2004).]

cd2
Dirt Maniac

Total posts: 161
posted March 29, 2004 08:02 PM  
Rooster08 When you move weight from one location too another you need to check the clearance from the floor too the bottom of the chassis,move the weight shake the car down then recheck the ride height and make the adjustments too set it back to the original heights.If your battery weighed 40# an you just moved it like you are taking about you will not get the weight results you are wanting.The left side of the chassis will raise up some an the right will lower some.This will not show you moved 40# until you reset chassis. cd2

cd2
Dirt Maniac

Total posts: 161
posted March 29, 2004 08:23 PM  
Rooster08 WE use L.R.weight too loosen the car going in & tighten it off. WE use R.R. weight too tighten going in & loosen off.You can use L.S.weight to loosen going in & tighten off. Less L.S.& moore R.S. to tighten in an through center.You can put a smaller tire on the L.F.& loosen in & tighten off.You can use a softer L.F. spring to loosen in or a softer R.R. You can move your R.R. out 1" or yourR.F.in 1" an this will loosen you in an all the way through corner.Why do you want to loosen up going in? Are you pushing or sliding out on entry? Are you just curious to what the weight move will do? Remember any time you move weight check & reset ride heights or you will not get the results you want.The weight will not go where you want it to. cd2

Rooster08
Dirt Roller

Total posts: 17
posted March 30, 2004 08:27 AM  
thanks for all the info. The car is pushing from corner entry to mid corner. I was under the belief that excessive crossweight would cause this problem, along with other factors. The changes I had planned on making are to put softer spring on right front, stiffer spring on left front, putting a smaller offset tire on the right rear moving it out about an inch, increasing positve camber of right front, running lower air pressure in the right front and raising air pressures in both rears. I was just wondering if relocating the battery would actually decrease the cross-weight and be of any benefit. Thanks again.

WesternAuto17
Dirt Forum Champ
Total posts: 569
posted March 30, 2004 10:39 AM  
Small suggestion - you may not want to do all those adjustments at once. You may end up over adjusting and you won't know which adjustment did what.

c21
Dirt Forum Champ
Total posts: 521
posted March 30, 2004 11:55 AM  
would I be correct in assuming that you have NO right front brake?

I would try shifting the brake bias more to the rear OR softening the right front spring (assumming you're not on the verge of running out of suspension travel on the RF)

make sure your alignment numbers are reasonable and check to make sure you are not having any suspension binding (particularly RF).

I agree with WesternAuto17, If you make more than one type of change at a time ..... what can you learn about your car?

in so far as what benifit if any shifting your battery will bring .... move it on the scales and see if you like the new numbers .... keep in mind that shifting ballast (the battery in this case) is done to manipulate left and rear percentages ..... if you want to change static cross ... change your spring shimming.

c21

[This message has been edited by c21 (edited March 30, 2004).]

Rooster08
Dirt Roller

Total posts: 17
posted March 30, 2004 12:38 PM  
c21 you are correct about no right front brake. The suspension is not binding I chekced that already. I will take your suggestion of only making one change at a time. I will start with the springs and go from there. Thanks for all the input and help it is greatly appreciated.

kyuss71
Dirt Roller

Total posts: 20
posted April 09, 2004 10:01 PM  
Rooster08,

Have you tried a little more r.rear stagger? I would start with simple things that take little time & are easy to change back if it gets worse. If you change too many things @ once, & your problem is gone, you still have to wonder what fixed it opposed to what caused it.

    

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