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Author Topic:   Scale help
RACEINMUD
Dirt Forum Racer

Total posts: 78
posted May 05, 2003 12:32 PM
First run last Sat. Loose in (bad)on 1/4 mile semi bank dirt. Track dry slick. Going to scale car the week. 72 buick 4/dr skylark needing to be min 3200lbs. 1100 lf 1250 rf 225 lr 200 rr. 225/70/15 rf on 8in w/ 2in offset . 215/70/15 lf on 7 in 3 1/2 offset. 205/70/15 lr 8 in w 2 in offset. 215/75/15 rr on 7 in 3 1/2 off. Please let me know what you think corners should weight and what tire press. would be good starting point. Thanks! Race

rico 08
Dirt Freak

Total posts: 372
posted May 05, 2003 01:41 PM
Looks like you have way too much tire stagger on the rear,try to keep the rear's close on size.

RACEINMUD
Dirt Forum Racer

Total posts: 78
posted May 07, 2003 09:40 AM
Ok, scaled car, this is what I have: LR 576 RR 792 LF 1000 RF 648. Where would you add weight to get my % right? Thanks. Race

flywheel
Dirt Roller

Total posts: 10
posted May 07, 2003 11:40 AM
You have to get the weight down on the left front or your gonna be adding 500 lbs or better to get close. lower the left front frame height or raise the right front frame height. Cause your WAY off. Definately explains a LOOSE condition. Maybe just maybe you can put a smaller(lots) tire on the left front to help some.

twleach2
Dirt Full Roller

Total posts: 46
posted May 07, 2003 11:54 AM
I would have to agree with flywheel. If the wieghts you listed are correct, you have 40% cross and 45 % rear. What you should have is 51% cross with at least 50% rear. Make all your tires the same and rescale the car. Use your tire sizes to get the scale percentages you need. Once the car goes into the corners, then change stagger to help with exit if needed. I actually run more air pressure (increase in tire radius) in my LR to add a little negative stagger.

Eljojo
Dirt Freak

Total posts: 281
posted May 07, 2003 04:13 PM
You'd better make that right front spring a little longer! Put a shim under it up in the pocket. Then throw yourself some lead in the trunk! Mine works best at 49% cross and 52.5 rear. I have a shipload of lead in it to get it that to that rear % but it really grabs up the track out of the corner. Load up the LEFT REAR of the trunk way back by the bumper--forget about that "pendulem " BS about having the weight behind the axle.

RACEINMUD
Dirt Forum Racer

Total posts: 78
posted May 07, 2003 04:53 PM
Eljojo, I have 3in spacers on the 9 1/2 springs. Should I just cut the LF down a couple of inches? Thanks.

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