C4 springs on a C3
Thread Starter
Le Mans Master
Joined: Aug 2010
Posts: 9,272
Likes: 17
C4 springs on a C3
Given that they make conversion mono springs for these C3's,
and given that you can cut a fiberglass spring and relocate the holes
any one running C4 springs? You can get stock ones in different spring rates
Did a search and nothing came up.
you can buy them for less than $100
many thanks
and given that you can cut a fiberglass spring and relocate the holes
any one running C4 springs? You can get stock ones in different spring rates
Did a search and nothing came up.
you can buy them for less than $100
many thanks
Thread Starter
Le Mans Master
Joined: Aug 2010
Posts: 9,272
Likes: 17
mainly cause the C4's are so cheap and plentiful and come in a multitude of spring rates, just for my 87 there's 6 that I've found, and if you get into the later C4' it adds a few more. havent decided to do it...yet . just curious, with all the different rates , you could change from a street cruiser soft to an autox'r stiff in bout 1/2 hour. could go to adjustable coil over's but thats $1200 vs $80.
Le Mans Master
Joined: Jan 2006
Posts: 6,506
Likes: 139
From: Butler Pa
If you have to cut it that will change the spring rate (stiffer) and you won't know what you have.
Pro
Joined: Jun 2004
Posts: 543
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From: Miami FL
St. Jude Donor '11, '14
Thread Starter
Le Mans Master
Joined: Aug 2010
Posts: 9,272
Likes: 17
they're about 45" , havent measured the C3.
this is where I got the idea from
http://www.google.com/url?sa=t&rct=j...KgJ1uayU-vY1mw
this is where I got the idea from
http://www.google.com/url?sa=t&rct=j...KgJ1uayU-vY1mw
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Tech Contributor
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From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
I've run a couple different C4 rear springs on my '69. While I'm running a C4 suspension I still retained the C3 differential (with a late C3 batwing). A couple things to consider. The spring mount configuration is different between C3 and C4 applications, as I'm sure you're aware. Also, the mounting height is different. I made an adapter plate to bolt up the C4 spring (other options are surely doable), and had to use longer outer bolts to get the ride height where I wanted it.
The C4 springs are dirt cheap at swap meets. I have three different rate springs on hand, and have the medium rate (base '84) on the car at the moment. I also have the '84 Z51 spring on the shelf, but haven't felt it necessary to change from the base spring. (The other spring is a base suspension soft rate item, nice for driving around but too soft for track days.)
I took about an inch and a half off each end for my application. A stock C3 suspension application will probably be different.
Keep us updated if you do the switch.
The C4 springs are dirt cheap at swap meets. I have three different rate springs on hand, and have the medium rate (base '84) on the car at the moment. I also have the '84 Z51 spring on the shelf, but haven't felt it necessary to change from the base spring. (The other spring is a base suspension soft rate item, nice for driving around but too soft for track days.)
I took about an inch and a half off each end for my application. A stock C3 suspension application will probably be different.
Keep us updated if you do the switch.
Last edited by 69427; Oct 31, 2012 at 11:00 PM. Reason: Spelling correction.
Safety Car
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From: Palm Harbor, Florida