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Author Topic:   the new leaf spring
lastlap10
Dirt Full Roller

Total posts: 37
posted March 29, 2004 03:13 PM  
I was wondering on the new leaf springs how they work and how good they really are. Im talking about the ones that are like a few lbs or what ever. I think they are like carbon fiber or something i am not sure i just heard about them and wondering where i can get some

c21
Dirt Forum Champ
Total posts: 521
posted March 29, 2004 04:08 PM  
Hypercoil ....

try this link http://www.propartsusa.net/products/hypercoil/leaf.htm

c21

lastlap10
Dirt Full Roller

Total posts: 37
posted March 29, 2004 08:28 PM  
thanks can you give me some info on it are they good leaf springs or what

droper23
Dirt Freak

Total posts: 233
posted March 29, 2004 08:58 PM  
I have not ran any, but I have heard people say they are supposed to be gauranteed to last a full 30 nights. Again this is what they are SUPPOSED to do. That is why they are expensive.

jammin
Dirt Administrator

Total posts: 6243
posted March 30, 2004 02:56 AM  
I did quite a bit of research on the hypercoil leafs hoping they would come out with a multileaf for Street or Superstocks. But looks like Mono is going to be it for quit some time. Circle track mag. has said a modified ran 32 races and was tested after and the spring still held the same arch and spring rate as new. Would love to try them myself if they ever get multileaf springs. Don't think they can though.

c21
Dirt Forum Champ
Total posts: 521
posted April 05, 2004 10:04 AM  
quote:
Originally posted by azwolfdog:
I did quite a bit of research on the hypercoil leafs hoping they would come out with a multileaf for Street or Superstocks. But looks like Mono is going to be it for quit some time. Circle track mag. has said a modified ran 32 races and was tested after and the spring still held the same arch and spring rate as new. Would love to try them myself if they ever get multileaf springs. Don't think they can though.

"multileaf" is open to creative interpretation..... Cut a blade from 1/4" thick plastic and mount it under the hypercoil leaf using a loose multileaf clip at each end.

c21

juliaferrell
Dirt Freak

Total posts: 370
posted April 05, 2004 10:59 AM  
I've been in the spring business all my life. Composites are on everything. Astro vans, vettes, these new f'body cars (setting crossways). This is not new technology here. I ran this stuff in the early eighties. The main problem is###### You don't need a multileaf spring. Composites are made with one leaf usually at thicknesses, widths, and tapers to create the load rating needed. You'll not see a composite multi-leaf because there is no need to make one.

(smiles)

c21
Dirt Forum Champ
Total posts: 521
posted April 05, 2004 11:31 AM  
julia,
do any of the oem composite springs have more coventional looking ends (eyes?)


IOW .... any that might be easily mistaken for a steel parabolic (or a steel mulitleaf if other leafs were added)?

c21

juliaferrell
Dirt Freak

Total posts: 370
posted April 06, 2004 08:55 AM  
Your best bet here would be to use a steel main and composite underneath. What type of spring rate are you looking for and I'll run some numbers and give suggestions. Single leaf (for instance mopar style .262 thickness) Could create more anti squat characteristics than the GM style with the 25 inch front end. Just let me know what you have and what your trying to accomplish and I'll try to help you.


c21
Dirt Forum Champ
Total posts: 521
posted April 06, 2004 09:05 AM  
quote:
Originally posted by juliaferrell:
Your best bet here would be to use a steel main and composite underneath. What type of spring rate are you looking for and I'll run some numbers and give suggestions. Single leaf (for instance mopar style .262 thickness) Could create more anti squat characteristics than the GM style with the 25 inch front end. Just let me know what you have and what your trying to accomplish and I'll try to help you.


unfortunatly, so many class rules preclude using chrysler springs on a chevy chassis ("stock" front eye mount location and wheelbase rules) and classes that don't restrict this .... often allow coil-overs (making leafs "seem" obsolete to some).

however, I like your idea of placing a composite blade under a mono-leaf.

would your experience suggest that composites could be cut and drilled or are they too "high strung" in this respect?

c21

juliaferrell
Dirt Freak

Total posts: 370
posted April 07, 2004 02:56 PM  
I wanted to add one more valuable thing.
Shocks ad tons to the life of a leaf spring. Bad shocks,,,,,,,leaf spring shot in 1 night. It's alot different on a chassis car as well when you are not trying to hold 1500 or 1800 pounds on it either. When you have the coil over doing all the work. If you really want a good lasting steel spring you can't deal with these aftermarket places. All your getting is a bunch of liquorice(?spelling). Send me an email if you would like to know how to put together a steel spring that will last a long time.

juliaferrell
Dirt Freak

Total posts: 370
posted April 07, 2004 06:43 PM  
Composites are mainly made of fiberglass with characteristics similar to your normal fiberglass fishing boat or pole. The early composite stuff was in the early eighties as a replacement for the multi leaf corvette set up. *They just had bumps in the center to locate the housing (not a center bolt). You can drill these and cut with your normal cutoff saw (band or abrasive wheel). But if you drill!!!!!! must have a snug fit and fill the hole with a bolt. You cant countersink or drill holes for clip mounts. Get a standard wrap around KK clip (mash the little center tab) or a banding tool with rubber liner to hold your leaves together. Just duct tape them up (as I see alot of racers but it is important not to tape over the ends##########. Wrap the spring first with fiberglass pipe insulation!!!!!! If you let me know what rates your looking for I will recommend a route of travel.

    

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