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Old 01-06-2007, 09:42 PM
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front spring rate on 36 Buick rat rod

Hello
I have a freind who is doing a 36 Buick as a rat rod. He has an aluminum headed SBC in it with Pinto front suspension. The car does not sit low enough in the front with the current springs
The engine is back quite a bit in the car with the front of the engine about 8 inches behind the rear of the upper control arm. The top of the original firewall is still there and the distributor is up against it(close)
Does anyone have a similar type layout with their project(Ford, Chev or Mopar) and if so., what spring rate are you using in the front of your car?
The Pinto front end is not altered for spring/shock location
any help or advice is greatly appreciated
Tom

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Old 01-07-2007, 12:13 AM
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Will this help?

Spring rates
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Old 01-07-2007, 06:27 AM
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Actually, the problem isn't the rate. The problem is the loaded height. Yes, you could use a stock spring with a lower rate and reduce the ride height. Or, you could cut your present springs and accomplish the same thing, but with an even higher rate. Or, you could buy springs with a shorter free length. Finally (and this might be the best solution), you could go to adjustable coilovers.

Remember: Reducing the spring rate at the front end will result in less understeer (usually not desirable in a street car), unless a stiffer front anti-sway bar is installed.
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Old 01-07-2007, 09:37 AM
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Hello
Thanks for your replies. He does not really want to go to coil overs. The suspension is just not going down low enough as it is on a stock vehicle(not enough weight on the front end for these springs)
He can get 2 inch dropped springs with the same rate, but I am afraid he will not have enough travel if he goes into a rut on the road ...
How much travel do you think he can get away with for up and down movement on a street car...?...this is going to be a driver, going over all types of roads
Right now the control arms are on an angle and I think they should be at least paralell( looks like it will lift and dance around for handling)
It only has about 1.5 to 1.75 inches at the spindle before the travel is out....not enough I don't think
thanks
Tom
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