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Author Topic:   What's up with our weights?
dode
Member
posted May 30, 2002 11:49 AM
Ok...here is how the car is setup...all shocks are Pro Shocks and mounted in stock positions. The car is an 85 Monte running factory stock with a 355, 3 speed, and a 9" with 5.29 gears on G-60's and 7 gallons of fuel in the center mounted fuel cell.

Wheel Spring Scale Weight
LF 1000 926
RF 1100 796
LR 250 970
RR 200 790

Left % 54.5
Rear % 50.5
Cross % 50.7%


The car weighs a total of 3482 with driver (must weigh 3400 by rules). We added 425+ lbs of lead to the car. 200 lbs behind the LR tire, fairly far back and as far left as we could get it. 100 lbs just a little behind the axle and about halfway between the centerline of the car and right hand side of the car. There is about 80 lbs under the drivers seat, and about 50 in the form of a lead blanket where the passenger seat was (covers holes and adds weight, two for one!). My question is how we managed to get so little rear weight compared to some others. I have seen cars two hundred pounds lighter have a lot more rear percent. From my understanding, we could use a little more rear weight correct? Maybe somewhere in the 52% range? We run on a 1/2 mile banked oval where track conditions tend to change quite a bit. Should we pull the weight from under the seat and put it in the back? If so, which side? Or, are these numbers ok? The car doesn't seem to be doing too bad right now. We are getting better every week. He is still learning to drive the car, and still isn't very good at giving feedback to us so we can make changes to the car. Thanks.

John

PURESTOCK 46
Member
posted May 30, 2002 11:53 PM
JUST MY OPINION, BUT I WOULD WAIT TILL YOU CAN GET SOME FEED BACK AND HE GETS A LITTLE MORE USED TO THE CAR BEFORE YA CHANGE ANYTHING.



racer17j
Member
posted May 31, 2002 01:03 PM
how big of a fuel cell do you have? i run a 22 gallon and put it all the way to the left i crudely scales my car at work the other nite on the truck scale out back and ended up with 48% rear but i can add 15 more gallons of fuel to help but i works great the way it is now so i'm leaving it. just like purestock said don't go making a bunch of changes till he can notice them if he's still got speed shock and is riding in the car more than driving he's not going to notice what the car is doing get him comfortable with the car then fine tune it


o5racer
Member
posted June 02, 2002 09:52 PM
you have 130# right in the middle of the car that doesent need to be there. put it on scales, pull that weight and put it in the back and then see what you have.


dode
Member
posted June 03, 2002 08:52 AM
Ok...after friday nights races, I must say that we had a few handling problems (we weren't the only ones). The track was dry and slick (surface of the track was VERY glossy). We spun out once, and just about did a couple of other times. We made some air pressure adjustments, and that helped some, but what would we want to change to make the car handle better on such a surface? Thanks.

John

ryan
Member
posted June 03, 2002 12:56 PM
A softer right foot helps on dryslick


dode
Member
posted June 03, 2002 01:30 PM
softer right...on both accounts? We dropped the air pressure in both right side tires 2 lbs and that did seem to help. What about weights? What would we want to do there? Since we can't change springs (we only have what's on the car right now), we would want to add left side weight? We do have the ability to easily move weights so this is what we have to work with for now, until we can get some sponsorship or something. Thanks.

John

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