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Author Topic:   ??Now I'm lost??
cmiller51
Member
posted September 25, 2001 10:42 AM
I race a camaro in super stock and I have a friend that has a modified.

This modified was a little tight on entry and in the middle and a little loose on exit. Not a big deal. I changed the right front spring by 50#. (800 to 850#) Without making any other changes. The cross % before the change was 51.1% with 74# of wedge. After the spring change the cross % was 52.0% with..get this.. 74# of wedge.

Has anyone ever increased cross percentage without increasing wedge. My guess is we have somthing bound up or somthing?? I don't know how this can happen without making other changes. The air pressure was the same on the tires, the spring rates were checked, and the weight jacks weren't touched. Am I wrong? Thanks.

mongo21
Member
posted September 25, 2001 01:45 PM
did you check ride height before the spring change...my guess is the right front now sits higher than before...thats your cross increase...when we change springs we adjust the ride height back to the starting point...my guess you could take a round out of the right front and put a round in the left front....put it back on the scales and see


cmiller51
Member
posted September 25, 2001 02:00 PM
My question is: Why did it not put wedge in the car? Why did the left rear weight stay the same?

I was always under the impression if you add weight to the right front you do the same to the left rear. If you add weight to the left front it affects the right rear.

Even if the ride height was raised by the new spring that should've added weight to the left rear, right?

mongo21
Member
posted September 25, 2001 02:31 PM
your talkin about the rear spilt...you didn't do anything to the rear,when you changed the front spring you took weight of left front and moved to right front.right front plus left rear is cross weight.if you want to increase left rear weight you'll have to move weight ,add weight or change ride heights in the rear.to increase rear % you'll have to take weight off the front add weight to the rear or move weight you already have in the car.by change the spring on the right front you increased the stored energy in that front wheel and increased the bite that tire has....if ride height is adjusted back to starting point before the spring change what you did is let the right front grip better...the push may have been a skate....and now have more stored energy when you come off the corner for more bite on left rear and right rear...i hope this helps come by the live chat sometime and talk.....later mongo


BILLY BOB
Member
posted September 27, 2001 07:20 AM
Sounds to me like the spring length wasnt exactly the same or the spring didnt sit in the lower the same..

jammin


racer17j
Member
posted October 11, 2001 01:10 AM
did you try to bounce on the car to see if you did have something bound up


cmiller51
Member
posted October 11, 2001 11:43 AM
I have taken this stupid car back apart. I compared the 2 springs. They are the same heighth and diameter.. I just don't understand modifieds. I did a 100# right front spring change to my camaro and it acts right!! (Increase in wedge and cross percentage) We, by the way, have cleaned every heim on his car to make sure there is no bind on anything. The car seems to perform well at the track, but I feel less comfortable making minor adjustments to it..



Tom Asmus
Member
posted October 11, 2001 07:09 PM
What kinda rear suspionsion does the car have. Does it have coil sliders on it?


cmiller51
Member
posted October 12, 2001 10:48 AM
It has Gearte coil eliminators on it..


Tom Asmus
Member
posted October 12, 2001 07:01 PM
I ve had problems with sliders being bound or gumed up, and that would not let thimgs move to free.


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