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Brian_e
Samba Member
Joined: July 28, 2009
Posts: 3293
Location: Rapid City, SD
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 Posted: Mon Sep 24, 2018 7:55 pm Post subject: Re: Questions About Stock Springs For High Performance |
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Here are the specs I measured with my tester.
Stock replacement progressive wound springs.
70lbs @ 1.5"
165lbs @ .450" lift
.519" lift to coil bind
Latest rage brand HD single springs. Made in USA. I use these on all single applications and have had real good luck.
150lbs @ 1.5"
218lbs @ .450"
.565" lift to coil bind.
Last edited by Brian_e on Mon Sep 24, 2018 11:00 pm; edited 1 time in total |
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bugguy1967
Samba Member
Joined: January 16, 2008
Posts: 4343
Location: Los Angeles, CA 90016
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| Posted: Mon Sep 24, 2018 7:55 pm Post subject: Re: Questions About Stock Springs For High Performance |
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Anybody know where I can still find some OEM Mexican springs? CB only has two left. Thought I might have similar numbers between a set.
_________________
"A petrol engine can start readily, run smoothly and give every appearance of being in good order, without necessarily being in good tune." - Colin Campbell, "The Sportscar Engine" |
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bugguy1967
Samba Member
Joined: January 16, 2008
Posts: 4343
Location: Los Angeles, CA 90016
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| Posted: Mon Sep 24, 2018 7:57 pm Post subject: Re: Questions About Stock Springs For High Performance |
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Thanks Brian. Do you know the source of your replacement springs?
_________________
"A petrol engine can start readily, run smoothly and give every appearance of being in good order, without necessarily being in good tune." - Colin Campbell, "The Sportscar Engine" |
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Brian_e
Samba Member
Joined: July 28, 2009
Posts: 3293
Location: Rapid City, SD
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| Posted: Mon Sep 24, 2018 9:44 pm Post subject: Re: Questions About Stock Springs For High Performance |
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| bugguy1967 wrote: |
| Thanks Brian. Do you know the source of your replacement springs? |
I don't. They were part of the inventory I bought from a VW repair shop that closed up. The old guy hated crap parts and used the best quality when he could. I am guessing this coffee can of them is at least 10-15 years old. He didn't do much in the way of aircooled work in the last 10 years.
PM me your shipping address and I will send you 8 of them. I don't use them on anything but stock rebuilt single port heads. I have enough to last me a while.
Brian |
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modok
Samba Member
Joined: October 30, 2009
Posts: 26790
Location: Colorado Springs
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| Posted: Mon Sep 24, 2018 10:30 pm Post subject: Re: Questions About Stock Springs For High Performance |
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So your saying both springs have the same coil bind height? 
don't think so tim |
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Brian_e
Samba Member
Joined: July 28, 2009
Posts: 3293
Location: Rapid City, SD
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| Posted: Mon Sep 24, 2018 10:59 pm Post subject: Re: Questions About Stock Springs For High Performance |
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| modok wrote: |
So your saying both springs have the same coil bind height?
don't think so tim |
Al,
Those were quick mesurments I had written on the coffee can and the bag the springs were in. I just went back out to the garage to check now, cause you had me wondering.
Here is the stock spring measured with my cheap Binford calipers.
Here is the HD spring
So the stock binds at .519", and the HD .565".
Good catch, sorry for the screw up. I will quickly go edit my last numbers and then go to sleep. 😔
Brian |
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modok
Samba Member
Joined: October 30, 2009
Posts: 26790
Location: Colorado Springs
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| Posted: Tue Sep 25, 2018 1:50 am Post subject: Re: Questions About Stock Springs For High Performance |
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Yeah that seems right.
binford, perfect 
A lot of engines the springs are setup .080" from bind, or sometimes even less, on a lot of the OHC models, and I wonder why?
Some say it helps to prevent spring surge, which is probably true, tho not a big deal.
I think it's more like....no reason not to. If you have extra clearance from bind...maybe you think your making life more easy on the spring, but if the spring does surge....then the coils will touch anyway if it starts doing the "slinky thing", so extra clearance from bind may actually NOT be an easier life for a spring.
You realize that the OE type-1 the springs were setup more like .160 from bind...... I guess they were not using this school of thought.
One of the many things that can be easily improved.
When I mess with springs, first thing I do is check where they bind, then back off .080 and read the pressure, and that and the free length is pretty much all i need to know about a spring.
It seems very simple but I know a lot of guys don't think of it that way, even with suspension. I was helping my brother install fancy springs on his maita and I realize the springs will bind before it hits the bump stop. yeesh. |
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