Help - Coil Spring C-7412-1A - Team Camaro Tech
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post #1 of 7 (permalink) Old Dec 27th, 11, 08:27 PM Thread Starter
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Help - Coil Spring C-7412-1A

Hello everyone,
I need a little advice here. I bought my coil springs (C-7412-1A) about 12 years ago when I started stacking up parts for my car. I looked online and I found a website (NPD?) that lists these as Hotchkis springs, but I am unsure if that is accurate: http://shop.autocraftinvestments.com...320&parent=845

I can not locate any other information on the springs, and I am trying to figure out if they will work and not leave the nose of my girl up in the air like she is from Beverly Hills I'm looking for a lower stance on my girl. The springs say high rate????

The problem if you call it that, is that the springs were listed as a 2 inch drop springs, however it looks like from the pictures below, the spring is actually much taller than the stock spring. Is this right? This is the first time I have ever replaced the front suspension in a Camaro, so I am not sure if the spring drops over time, or what. I hope I have listed enough info here to give you an idea of what I am trying to figure out. Any help would be much appreciated!



Car details:

Small block
Cast iron heads
No AC





Eric.B
Denver, CO
1967 Camaro

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Last edited by Depthrecordings; Dec 28th, 11 at 07:55 AM.
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post #2 of 7 (permalink) Old Dec 28th, 11, 09:28 AM Thread Starter
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Re: Help - Coil Spring C-7412-1A

I guess I should mention thatthe stock springs came out of a 6 cyl car.
Thanks,
Eric

Eric.B
Denver, CO
1967 Camaro

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post #3 of 7 (permalink) Old Dec 28th, 11, 02:04 PM
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Re: Help - Coil Spring C-7412-1A

Your's are not the right color and too long for Hotchkis drop springs... Yours look like stock SB replacment springs.

Hotchkis PN 1907F

...Dennis

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post #4 of 7 (permalink) Old Dec 28th, 11, 03:45 PM
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Re: Help - Coil Spring C-7412-1A

My guess is they'll turn your car into a 4X4, like the stock replacements springs from Classic did to mine. I ended up going with the proper Hotchkis.

The link you posted says they should be grey powdercoated, which Hotchkis are. Yours are blue? I think you got sent the wrong ones.
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post #5 of 7 (permalink) Old Dec 29th, 11, 08:34 AM Thread Starter
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Re: Help - Coil Spring C-7412-1A

Well I bought them 12 years ago from NPD and I doubt I can return them now. Crap! They have the same part number. I wonder if Hotchkis ever made them in Blue? O well.
Should I cut them or just buy the dropped springs? What are the disadvantages of cutting the spring?

My front suspension is set up as follows:
Stock Lower control arm, Moog lower ball joints, SPC adjustable Uppers(SC&C stage 2 plus) with NASCAR tall ball joints, stock spindles(modified to work with 69 Chevelle disc brakes), and Koni Shocks.
Around every corner theres another 2 or 3 hundred dollars to spend...LOL

Eric.B
Denver, CO
1967 Camaro

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post #6 of 7 (permalink) Old Dec 29th, 11, 11:34 AM
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Re: Help - Coil Spring C-7412-1A

Those coils are too tall and the wire dia looks too thin to be a performance drop spring. I would not use them. Most stock replacement coils leave the front end too high and are too soft to work well if you cut them down. We have a great spring thread going here: https://www.camaros.net/forums/showthread.php?t=103250

In general, you need a stiffer shorter coil. For a guy with stock type tires and 15" wheels, the Moog coils 6308 and 6320 are nice, shorter and stiffer but not twice as stiff like the tuner springs. If you are using 17" or 18" rims and want the car to sit very low, then you need stiffer aftermarket coils in the 600+ range and shocks that are tuned to still give you a decent ride. Stiffer coils can ride well if your shocks are right.
David

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67 RS 327 original owner. 1965 Lola T-70
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post #7 of 7 (permalink) Old Dec 29th, 11, 12:51 PM Thread Starter
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Re: Help - Coil Spring C-7412-1A

Quote:
Originally Posted by davidpozzi View Post
Those coils are too tall and the wire dia looks too thin to be a performance drop spring. I would not use them. Most stock replacement coils leave the front end too high and are too soft to work well if you cut them down. We have a great spring thread going here: https://www.camaros.net/forums/showthread.php?t=103250

In general, you need a stiffer shorter coil. For a guy with stock type tires and 15" wheels, the Moog coils 6308 and 6320 are nice, shorter and stiffer but not twice as stiff like the tuner springs. If you are using 17" or 18" rims and want the car to sit very low, then you need stiffer aftermarket coils in the 600+ range and shocks that are tuned to still give you a decent ride. Stiffer coils can ride well if your shocks are right.
David
David,
Thanks so much for the info. I will do some checking on the coil spring thread. Your info has come in very handy!
Thanks again,
Eric

Eric.B
Denver, CO
1967 Camaro

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