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Old 01-23-2006, 06:45 PM
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Hookin up with leafsprings?

I have a 79 T/A can i get a few pointers on how to get this leafspring car to hook up? Stock leafsprings,Subframe connectors,SSM lift bars.

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Old 01-23-2006, 06:50 PM
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What gears and tires do you have....posi rear end?

Rear shocks....front shocks.........stablizer bars?
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Old 01-23-2006, 06:59 PM
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Gear: 4:10,Tire: 28/10.5/15 M/T Drag,Rear shocks:Cheap wore out ones,Front shocks:CE 90/10, No stablizer.
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Old 01-23-2006, 07:08 PM
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I guess you just have way too much motor.......................Sounds like it should be hooking up quite well.

What are your 60ft and 1/4 mile times?
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Old 01-23-2006, 07:11 PM
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60 ft. 1.87 1/4 best 11.77@115
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Old 01-23-2006, 07:13 PM
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Which front wheel comes off the ground during acceleration?

Wondering which way the body is twisting.
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Old 01-23-2006, 07:23 PM
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I'm not real familiar with that rear suspension but i do know that the stiffer the rear the better it will hook assuming the track isn't too rough, so get some new stiff shocks. Also the no stabilizer on the front is good, but very bad on the rear. You will want a stiff stiff anti-roll bar/sway-bar/stabalizer on the rear. This will prevent bodyroll and result in more equal tire loading

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Old 01-23-2006, 07:26 PM
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No wheels come off the ground this thing weighs 3850 with driver. Has a 8 point cage.
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Old 01-23-2006, 07:31 PM
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Sorry, but with 11 second times, I didn't see that there was much of a problem. Your 60ft times are decent, could be a little better. I think that you need a little better weight transfer, back end down, front end up. Maybe a lighter front spring that would release a bit more.
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Old 01-24-2006, 01:23 AM
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Herb Adams VSE used to sell modified rear spring brackets (for the front of the leaf springs) that had the cross-bolt moved upwards by about 3/4" or so. This was to increase traction during acceleration (both straight-line or out of a corner) by increasing the anti-squat in the rear suspension. You might be able to modify yours similarly. I believe the top of the bracket was opened up a bit to clear the spring eye.
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Old 01-24-2006, 07:09 AM
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The picture I posted is a low 9 second car, weighs 3800 lbs.
Here are some more Tips and Tricks
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Old 01-24-2006, 12:56 PM
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Quote:
Originally Posted by jimfulco
Herb Adams VSE used to sell modified rear spring brackets (for the front of the leaf springs) that had the cross-bolt moved upwards by about 3/4" or so. This was to increase traction during acceleration (both straight-line or out of a corner) by increasing the anti-squat in the rear suspension. You might be able to modify yours similarly. I believe the top of the bracket was opened up a bit to clear the spring eye.
Right on, Jim, but he might want to go even further than 3/4 of an inch. The "if some's good, more's better" school might not aways be right, but, in this case, it wouldn't hurt to emulate the Mopars of that era and get the rear up in the air during launch. Weight transfer is improved as you increase the CG height, and that means keeping that rear end up in the air.
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Old 01-26-2006, 10:06 AM
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Before we go off on a tangent.....

WHAT is the car doing on launch? Lifting or squatting. I would assume squatting. If so, look into a set of CalTracs. You can even make a set. Do a google search. The info is out there on how to build them.

You can go too far stiffening the rear. Dont think so? Try struts in place of shocks. The car will burn the tires off. (Zero transfer)

The sway bar can be preloaded to help out the spining tire. Add length to the link, on the side that spins first.


Standard or Auto trans?
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Old 01-26-2006, 11:35 AM
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NXS' suggestions to stiffen the rear would neither help nor hinder weight transfer. Weight tranfer is a function of CG height, total weight, acceleration, and wheelbase. That's it. The only way you can affect weight transfer with a suspension change is if that suspension change somehow affects one or more of those four parameters. The stiffening of the rear, relative to the front, provides more equal loading of the rear tires. In other words, you want to cancel out that driveshaft torque (which tends to unload the RR) and, by stiffening the rear relative to the front, more of the reaction torque is directed to the rear for cancellation.

(Eliminating the spring action at the rear entirely means that the car is sensitive to small bumps in the track surface. So, this change affects the acceleration...one of those four parameters...and thereby affects weight transfer.)
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