 Spring Rate of Stock Rear Coils |
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| Seventyfive914 |
 Aug 4 2006, 08:27 AM
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#1
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Member  Group: Members Posts: 72 Joined: 9-December 04 From: Wilmington, NC Member No.: 3,249  |
Hey Folks. May I inquire as to the rate/lb. rating of the stock rear coils of a '75
914-4? Regards, -K- |
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| seanery |
Aug 4 2006, 08:32 AM
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#2
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waiting to rebuild whitey! Group: Retired Admin Posts: 15,852 Joined: 7-January 03 From: Indy Member No.: 100 Region Association: None |
I think they are in the 60 -75 lb range...but not 100% sure on that.
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| brant |
Aug 4 2006, 08:57 AM
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#3
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914 Wizard Group: Members Posts: 11,622 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains 
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I can't remember either...
but have it stuck in my head that it might be 80lbs? (pre- sag and pre- age) brant |
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| Bleyseng |
Aug 4 2006, 08:59 AM
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#4
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Aircooled Baby! Group: Members Posts: 13,034 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
If you are buying new springs get the 140's# as replacements. The 80lb ones are too weanie.
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| seanery |
Aug 4 2006, 09:00 AM
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#5
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waiting to rebuild whitey! Group: Retired Admin Posts: 15,852 Joined: 7-January 03 From: Indy Member No.: 100 Region Association: None |
I have 125s on adjustable perches and like 'em .
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| gary gartner |
Aug 4 2006, 10:46 AM
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#6
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i know more than a newbie---way less than a guru Group: Members Posts: 239 Joined: 16-December 04 From: Valencia, Ca Member No.: 3,294 Region Association: Southern California |
Guys,
the bird catalog shows stock springs as 100# the bird never lies ( maybe) |
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| maf914 |
Aug 4 2006, 11:10 AM
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#7
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Not a Guru! Group: Members Posts: 3,049 Joined: 30-April 03 From: Central Florida Member No.: 632 Region Association: None
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QUOTE(gary gartner @ Aug 4 2006, 08:46 AM)  Guys, the bird catalog shows stock springs as 100# the bird never lies ( maybe) Those are probably made by Weltmeister. I have a pair of Welt 100# springs on my car and they seemed to be a little stiffer than the stock springs when I replaced them. One thing for sure is that they raised the ride height noticeably from the original sagging spring position. I have seen claims for the stock rear spring rate to be between 70 and 90 pounds. |
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| Oled |
Aug 4 2006, 11:14 AM
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#8
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Newbie Group: Members Posts: 44 Joined: 5-February 03 From: San Antonio, TX Member No.: 247 |
914-4's were about 80# 914-6 about 90#. The spring rate is measured in the force (pounds) required to compress the spring one inch (after a preload.) Because the original springs were chosen waith a better ride in mind, they were taller and therefore had a larger range of movement than higher rated springs now have. Remember that the rear springs are a part of a system and if you drastically change one part of the system you must change others to compensate. You probabley could (and I have in the past) go to 100#ers with no other changes. I then added a stock sway bar in the front and was very pleased. I now have 140's on the car and have increased the front torsion bars to 21mm and I use a 19mm sway bar. The bar is usually set at full light and again the car has a very neutral set up.
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| jhadler |
Aug 4 2006, 12:48 PM
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#9
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Long term tinkerer... Group: Members Posts: 1,879 Joined: 7-April 03 From: Lyons, CO Member No.: 529 |
Yeah, the original stock ones for -4's were around 75 lbs. Super soft. The "stock" replacements that the Bird sells are 100 lbs if I recall.
-Josh2 |
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| Mueller |
Aug 5 2006, 12:29 AM
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#10
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None
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/4 springs on the left column, /6 spring info on right column
(IMG:http://www.914world.com/bbs2/uploads/post-87-1148446689.jpg) |
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