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Author Topic:   Hobby Stock Setup Help
Racer98
Member
posted July 16, 2003 05:56 PM
I am having some trouble handling my car, its not the worst but I would like to get it better, Im a rookie and am stilling learning how to drive, I know my car is setup good for the most part, but there is always room for improvement. It scales out at 3042 lbs. # s are Lf 721, Rf 779, LR 861, RR 681. Comes out to be 52% Left, 53.9% Diagonal, and 50.6 % Rear. And 180 lbs of rear bite/split. My springs are lf 1000, rf1100, lr 200, rr 175. I run 205 75 15 tires, and run 1/8 inch toe. I have +1 degrees camber on the left front and neg 2 on the right. And have positive 0.25 degees caster on the left and + 3.5 on the right. I usually set my tires at 18 left front, 28 rf, 16 lr, and 26 rr. Not sure what to run for tire pressures, any help there, im afraid to take them down too low, especailly right rear with no bead lock. I cant do much for weight but I can move my fuel cell more to the left or to the right. And possibly get some weight in the rear some how. I run even up for stagger most of the time. I would like to get my car set up the best for dry slick conditions. I run a 9 to 1 engine with a Saginaw 3 speed and a ford nine inch with 650 gears on a 1/3 mile with tight corners and long back stretch. Any help will be great ,
Thanks Jeff


rico 08
Member
posted July 16, 2003 06:31 PM
One thing i noticed by looking at the scale #'s was the right front was heavier than the left,that is not good and will cause a push and/or overheat the right front.Try a spacer in the left front or if the right has one take it out,using a scale of course.


racer17j
Member
posted July 16, 2003 06:57 PM
i agree 54 is pretty hi for cross weight try a 2 in offset on the rf and a 4 in on the lf should take some weight off that rf and transfer it out to the left. for air pressure i run 26 rf and 20 the rest of the way around. how does it handle now do you think it needs to be tightened up on dryslick ?


squid
Member
posted July 16, 2003 07:49 PM
maybe try moving your fuel cell over to the left this might take some of the cross out of the car and your really dont need that much bite on a restricted motor. but be sure to check ride heights and cross after this adjustment.

what are you trying to fix or adjust??

Eljojo
Member
posted July 16, 2003 09:18 PM
I'll have to agree that the cross is a bit excessive. I don't think moving the fuel cell to the left would create less crossweight-but increase it.I'd suggest putting a increasing the right rear cornerweight (shim or scrwjack) I like your spring rates and your gear selection. Don't let anyone tell you that you need high ratios to run on a slick track. You may want to add some ballast to the rear to pick up your percentages there, but get that cross weight down to about 49-49.5 and see how she handles. You'll have to put the egg under the pedal..but I think you'll be very close!


Racer98
Member
posted July 16, 2003 10:05 PM
I was going to move my fuel cell to the right, but was told it does the opposite of what one might think and will add more cross weight rather than take it out as one might think. Whos right? I would like to get the cross weight % down and the rear bite down to say, 125 to 150 lbs, I think? I can move my 22 gallon fuel cell to the right about 10-12 inches. Eljojo, thanks for the help, what would you do. Thanks


carboy34h
Member
posted July 16, 2003 10:34 PM
I'd leave the fuel cell right where it is. Try putting more pressure on the right rear spring. Worse comes to worse, put a water pump pulley on top of that spring.That will decrease the split or bite and reduce the crossweight.
The idea that putting weight on the right side is valid IF the right spring is too short or too soft, yup, the left spring will carry all the weight and increase cross.
I've read posts where guys have not run ANY right rear spring...I can't see that this would work, but WTH this is dirt racin' we're talking about!


2xtreme
Member
posted August 14, 2003 12:10 PM
I have lost a right rear spring before while on the race track...and it handled awesome til the fender well burned through the tire and blew it out...lol.I don't see how you could run a full race with no coil.


fbaker
Member
posted August 14, 2003 09:27 PM
Just curious, if Racer98 had leaf springs on the rear, would the lr200 and rr175 still be right. Obviously I have leafs, & the rest of the car sounds like mine, (trans, rear gear, front springs) but nobody here ever mentioned rear leaf spring weights. I think(?) I'm running 200lbs l&r. Thanks guys, you people are great.


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