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Author Topic:   weight %'s on the scales ???
Rad Racing 03
Dirt Roller

Total posts: 18
posted June 02, 2004 10:32 PM  
Hey guys,

( What a relief to find your forum ! )

I got a leafspring street stock thats pushing hard in the entry and middle of the turn. I cant finish a race without throwing off a bead on my RF. I have been trying this in that with stagers and spring rates & hights, to the point that now I'm getting to loose down the straight.

I'm using 800 900
200 175 for springs,
3" offsets on left, 2" on right.
Swaybar cranked down on LF and jacked up on RF.
Upper a-arms shimed in on RF, none on left. 0.5 stagger up front , and 2.5 in back w/2" lowering block on the LR.
I am needing to know what %'s that I should shoot for on the scales. I am basicaly going to start all over on this set up, and need to know what I should aim for on the scales, as a starting point. Also, I've had mixed advice on tire pressure when weighing the car. Some have told me to fill all of them to 20 lbs., others have siad to weigh with the pressure you will run with.
Thanks for being here!


Dirt Maniac

Total posts: 149
posted June 02, 2004 11:39 PM  
what surface are you running?

Rad Racing 03
Dirt Roller

Total posts: 18
posted June 02, 2004 11:56 PM  
running a dirt track w/alot of clay, its been pretty heavy this year, but dries up in summer and is like some rough asp. 1/5 high bank crash bowl.

Dirt Freak

Total posts: 255
posted June 03, 2004 05:21 AM  
What kind of car is this?
I run a 80's metric and my front springs are 900 & 1100.
Depending on the car, I would try raising the front spring rate. It sounds like you are to light and all your car's weight is rolling onto the right front, and it can't hold it.
Which is causing it to push.
Also any idea of caster and camber and toe out setting's?

Rad Racing 03
Dirt Roller

Total posts: 18
posted June 03, 2004 09:09 AM  

I realize I am going to be heavy (3550 lbs.), but wouldn't it be better to be heavy and on the % marks, rather than be a little lighter and off on the scales? I've got plenty of motor and geared right for the track I run. If I can get this car to handle right, I should be able to give the leaders some comp. I can keep up with the lead cars on the straight, and walk away from alot of the others, but fall back in the turn because of the push.
Is there any way to add more rear, without adding or removing weight.
I built this car to survive at our crash bowl, It's very solid and has already taken some good hits.

[This message has been edited by Rad Racing 03 (edited June 10, 2004).]

Dirt Forum Champ
Total posts: 2007
posted June 10, 2004 10:19 AM  
If you want to add rear without adding or removing weight then try moving as much weight towards the back of the car as you can.

Dirt Freak

Total posts: 255
posted June 10, 2004 10:40 AM  
Where did you add the weight to the LR, was it over the axle or farther back?
Remember you can add less weight and get the same % by mounting it as close to the bumper as possible.

Dirt Forum Champ
Total posts: 776
posted June 10, 2004 02:59 PM  
Can you run aluminum water pump, intake, master cylinder. Can you run aluminum bumpers. How about motor setback? Anything lighter that you can put on the front the better. If you run at 3500lbs at say 50% rear or 3300lbs at 50% rear you will be have the same ratio on the rear but lose 200 lbs to drag around.

Dirt Full Roller

Total posts: 72
posted June 10, 2004 04:30 PM  
first of all the car looks good...nice cage
a little more bracing in the front than i like...but if it is what you need then ok
i like to buid crash zones toward the ends of the car and strong in the middle to save the driver and maybe the frame
most of the time the weight thing ends up being a compromise , being a little heavy
to get your percentage is ok but i don't like being more than 50# over no matter what
how do your lap times compare yo your stronges bout tire wear or temps?
sometimes we have to slow down to speed up?? my 2 cents

Dirt Maniac

Total posts: 136
posted June 11, 2004 03:15 PM  
Only ? I have is does the driver sit in the middle, I have never seen a cage with such a small halo, and one thats so far over to the left?

sure looks like you would have to be outside it to me!!!


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