front springs

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front springs

Postby jeffs73v8vega » Sun Feb 04, 2007 8:54 am

Need some help with front springs. Right now I believe I have the old Don Hardy front springs but are sagging, so there are spacers in between the coils.The car is a 73 8v Vega with stock A arms.There are some v8 monza springs on e-bay(5576) real stiff ones is that too stiff? Pennsalvania roads are not that great. Would like to drive on the street with out draging pan or headers.
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1973 Chevrolet Vega GT


Postby 73Sedan » Sun Feb 04, 2007 12:40 pm

It may sound odd, but I'm planning on the CS6490 springs used for deep pockets on my 73 with shallow pockets. They have a taller free height and actually a softer rate, but since they will start out compressed more in the shallow pocket, they should give a good ride while maintaining a good ride height. I think they were $60 from Advance Auto and available next day.

I also have the complete TRW/Moog spring reference chart in the suspension section. I scoured it, and did A LOT of calculations, and I still think this is the best soft front theory for a strip/street setup.
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Postby jeffs73v8vega » Sun Feb 04, 2007 6:04 pm

You don't plan on cutting a round out like I hear some guys do
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Postby 73Sedan » Sun Feb 04, 2007 10:16 pm

Not at all. The Monza spring has a higher lb/inch rate. By mathmatical theory, that spring will not allow the compressed 2" of suspension travel to work properly, making a much firmer ride. Of all the possible springs I ran calculations on in that chart, the 6490's always made the most sense (only applies to the shallow lower pocket setup).
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