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spring rating

Old Aug 11, 2014 | 08:20 AM
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Default spring rating

hello all,
my 79 c3 came with a composite rear spring, and wondering if there is any way to determine the rating. there's only one mark, a "17" stamped on the bottom near one end. it's black, the thinnest section measures 10mm.

no luck searching, many thx!
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Old Aug 11, 2014 | 01:43 PM
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I think there are multiple manufacturers of replacement springs and they are unmarked so you may not be able to find an answer.

Last edited by MelWff; Aug 11, 2014 at 01:46 PM.
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Old Aug 12, 2014 | 07:35 AM
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ah, thought that may be the case.

am after a smooth ride that's a little flatter in the corners. the delco "performer" shocks may be original, and am considering my options to replace them. am also considering upgrading the F sway bar and adding a rear. i'd like to balance the shocks / sway bar / spring if possible.

i'll keep reading, many thx!
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Old Aug 12, 2014 | 08:29 AM
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If you post a picture or send me one I can probably answer that.
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Old Aug 12, 2014 | 07:14 PM
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thx! am on vaca at hampton beach at the moment, but will will get back with pics of the spring.

bob p
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Old Sep 17, 2014 | 08:03 PM
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Default spring pics

back from vaca, then kid off to college, then got my firewood in, then off to maine. sheesh!

anyhow, here's a coupla pics.

edit: pic was taken while opposite side was jacked up to scotch-bright and paint the framerails, the clearance from spring to exhaust is actually about 1 1/2inches.
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Last edited by standswithabeer; Sep 17, 2014 at 08:12 PM.
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Old Sep 18, 2014 | 12:52 AM
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Originally Posted by standswithabeer
thx! am on vaca at hampton beach at the moment, but will will get back with pics of the spring.

bob p
Would that have been Hampton Beach, NH? I was a lifeguard there in 1978 after college and before the USAF. Great times with my "new to me" '71 coupe that I'm presently restoring...
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Old Sep 18, 2014 | 08:55 AM
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yup, at hampton beach. we usually go for 4 days of so each summer, after that am bored. a nice long, sandy beach for walking/picking. a great time, with the exception of the canadans and their "banana hammocks". a little unsettling.
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Old Sep 18, 2014 | 03:50 PM
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Your spring is NOT from VB&P. It appears to be a TRW spring (Muskegon Brakes - who answered your post earlier - manufactures/distributes now) OR it may be a Hyperco spring, which is similar to the TRW but has a flatter downward curve.

Try getting back with Muskegon.
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Old Sep 18, 2014 | 07:19 PM
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Originally Posted by standswithabeer
am after a smooth ride that's a little flatter in the corners. the delco "performer" shocks may be original, and am considering my options to replace them. am also considering upgrading the F sway bar and adding a rear. i'd like to balance the shocks / sway bar / spring if possible.
With that 'glass spring, there's a lot less internal friction (self-damping) within the spring than the steely. Those Delcos just ain't gonna cut it. I highly recommend the Bilstein Sports on all 4 corners. They're also good for 100,000+ miles with little to no loss of damping.
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Old Sep 18, 2014 | 07:25 PM
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Originally Posted by standswithabeer
yup, at hampton beach. We usually go for 4 days of so each summer, after that am bored. A nice long, sandy beach for walking/picking. A great time, with the exception of the canadans and their "banana hammocks". A little unsettling.
!!
don't look ethel!!
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