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Author Topic:   NO TRACTION,OPEN DIFF
CONEILL41
Dirt Newbie

Total posts: 4
posted July 22, 2004 07:16 PM  
IM HAVING TROUBLE WITH WHEELSPIN COMING OUT OF THE CORNERS,WE RUN A OPEN REAR END AND NO BALLEST PER RULES.HOW CAN I GET MORE WEIGHT TO TRANSFER TO THE L.R. TIRE I HAVE A 300LB RR 250LB LR,MABEY SWITCH THEM AROUND? OTHER THAN THAT THE CAR HANDELS VERY WELL.

M1
Dirt Freak

Total posts: 257
posted July 22, 2004 09:49 PM  
I run an "open rear end" too. According to our rules, we CANT lock them, or add any weight. I have had problems in the past with excessive wheel spin, and there is little you can do about it. Some things that DO help are....

BIG gas tank. I run a 18 gallon cell FULL all the time.

I run reverse stagger. 85 inch right front, 80 inch left front. 80 inch right rear, and 83 inch left rear. Cooper Cobra tires are good and sticky and do well in mud and dry. Firestone indy 500's are a little better.

my old car had alot of wedge welded into it, and the new car has none, and I sure can tell the difference. The new car handles worse then the old car. TONS more wheel spin.

Your springs are in backwards. I have never tested my springs for a rating, but I know if i could, I would want the stiffer spring on the LR.

Keep your sway bar. If it has one, or had one in the back keep that too. I noticed a little difference in it with one IN.

I'll post more as I think of it later.

racin2much
Dirt Full Roller

Total posts: 46
posted July 22, 2004 11:30 PM  
Springs, tire pressure, and control arm angles, all will effect what you got. Also slightly loosening your rear control arms will lessen bind and help.

Hobbystocker
Dirt Full Roller

Total posts: 41
posted July 23, 2004 07:48 AM  
I'm sorry but I gotta call you on the "loosening" of the rear control arms. I've never heard of such a thing as that and still be safe. As much torque that is going on at the rear end of a race car, do you really want any "loose" parts back there? I know I wouldn't. Not to mention it would eventually "waller" out the bolt holes on the control arms themselves, thereby ruining the parts all together. If you truly do loosen the control arms on your race car, I'm gad I'm not running the same track that you are.

marshalr
Dirt Maniac

Total posts: 148
posted July 23, 2004 08:28 AM  
If you can use wheel spacers or offset wheels kick the right rear out a little to reduce weight transfer. Widening the rear track width will reduce weight transfer thus keeping more weight on the left rear.

outlawstock17
Dirt Forum Champ
Total posts: 1363
posted July 23, 2004 10:47 AM  
hobby stocker,

running the rear control arm bolts loose is an old trick that will help free up the rear suspension. they won't fall out if you use longer bolts and double nut them. also, welding one of the nuts to the suspension bracket will keep from wearing out the bolt holes.

powerglides
Dirt Freak

Total posts: 374
posted July 23, 2004 12:53 PM  
You can also add another washer behind axle gears and make a backyard limited slip. You might have to "coax" the thing together but it is better than nothing.

racer17j
Dirt Forum Champ
Total posts: 5390
posted July 23, 2004 04:48 PM  
You don't loosen them where they are gonna fall out. And they have lock nuts on them. You just remove some of the bind that is created when you apply force.

[This message has been edited by True Blue (edited July 23, 2004).]

bobaluuu
Dirt Freak

Total posts: 474
posted July 23, 2004 09:51 PM  
there is also a hundred places from the drivers seat back that you can add weight and hide it too. 1 to 5 lbs here and there is nearly impossible to see if done correctly
You can stuff 120 lbs or more in the cell with loose wheel weights and strapp it down onto a steel plate1/4 inch thick. the front runners in your class have ballast, bet on it ------------------
Light it up, Baby!

[This message has been edited by bobaluuu (edited July 23, 2004).]

o5racer
Dirt Freak

Total posts: 402
posted July 25, 2004 09:12 AM  
Two things. Bigger left rear tire to help with wheelspin and start replacing cage tubing in the trunk with solid steel bar.

    

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