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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

Progressive rate front springs

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Old Jul 9, 2014 | 11:55 PM
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From: On the Edge of the Desert
Progressive rate front springs

I am assuming that the factory coil springs on F-100s were just plain ol constant rate springs. ( mine seem to be anyway) So I was wondering about putting heavy duty progressive rate springs in their place. I think that would help with bottoming and may even give the front end a little bit of a boost.

Who done it before?
 
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Old Jul 10, 2014 | 03:59 PM
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Progressive (hate that word) rate springs are designed to give you a softer ride while bouncing on their upper and wound closer coils. Then a stronger ride once the suspension compresses the upper coils and gets in to the lower,stronger,and wound farther apart lower coils. They will prolly fix a bottoming out problem but only because your original springs are prolly weak now.
 
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Old Jul 10, 2014 | 05:01 PM
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Yea they're probably a little weak. I'm not gonna worry about it until later. For $70 I can get a new pair so.....
 
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Old Jul 10, 2014 | 06:34 PM
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Originally Posted by JEFFFAFA
Progressive (hate that word) .........
I'm with ya brother... it's a synonym for "spineless" and "dependent".
 
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Old Jul 10, 2014 | 06:34 PM
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I have Moog Cargo Coils in my truck...> http://www.summitracing.com/parts/mog-cc808/overview/
 
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Old Jul 10, 2014 | 06:57 PM
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Originally Posted by HIO Silver
I'm with ya brother... it's a synonym for "spineless" and "dependent".
Yeah. 'Zackly. I'd add a few more off the ol' noggin but I don't want to hijack the thread. Thanks for your chime-in Hio.
 
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Old Jul 10, 2014 | 07:41 PM
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Originally Posted by instig8r63
I have Moog Cargo Coils in my truck...> http://www.summitracing.com/parts/mog-cc808/overview/
Yeah, those are the ones I was looking at. How are they?
 
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Old Jul 10, 2014 | 08:00 PM
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Originally Posted by 351Cleveland C4
Yeah, those are the ones I was looking at. How are they?
A big improvement over 40+ yr. old original springs.
I have a set of KYBs that I'm going to throw in also.
 
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Old Jul 11, 2014 | 11:01 AM
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From: On the Edge of the Desert
Did it make any difference in ride height?
 
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Old Jul 11, 2014 | 01:54 PM
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Originally Posted by 351Cleveland C4
Did it make any difference in ride height?
It did raise the front a bit but I do not have my hood on yet.
Hood is approx 100 lbs.
 
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