Thread: Composite leaf springs

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I want to run a pair of composite leaf springs under the '57.--- Wondering if anyone might have a good source for Landrum or ???? brand composite leaf springs??? Can't find much around here.

Thanks

I believe Speedy Bill sells them.

Originally Posted by Bob Parmenter

I believe Speedy Bill sells them.

Not much selection on rate or size in the book, I'll give them a call in see if they can order others....

I've experienced that on Posie springs with them. They don't catalog them all, but either have them or arrange a drop ship.

Originally Posted by Bob Parmenter

I've experienced that on Posie springs with them. They don't catalog them all, but either have them or arrange a drop ship.

Yup, it is, just got off the phone with one of the tech people, got all the information I need to have for the car then he will order me any length, rate, and pin location I want!!!! Kewl deal, thanks Bob!

Dave, I know very little about composite springs, what are the advantages and disadvantages?

Don

Big advantage is weight, two composite springs weigh about 16 lbs. The stock 3 leaf springs for the car are right at 40 lbs. each, so a net loss of 64 lbs. The '57 will also have housing floaters, ladder bars, and sliders instead of shackles. Disadvantage, about twice as much money.

We had them on a late model circle burner many years ago. They stand up very well to racing so they'll do great on a street car! Lots of options when you order them including rate, center bolt location, mount size, lateral stiffness, width, etc.

Other advantage is cycle life....min of 10^6 cycles with full spring rate

Originally Posted by robot

Other advantage is cycle life....min of 10^6 cycles with full spring rate

Thanks, that's the other I didn't remember!!!!

Dave I never heard of those either. Pretty cool. Found an article talking all about them in Circle track racing
Leaf Spring Tech - Install - Terminology & Overview - Circle Track

I've used them on some corvette style suspensions but what are you going to do about the ends for the shackles/mounts???

Think I'll use a slider on the rear instead of shackles, maybe a multi-position bolt through mount on the front....

Jerry,when you order them up they'll put what ever you need on em.

yep you can get them just like steel leafs but about 1/3 the weight

Originally Posted by stovens

Dave I never heard of those either. Pretty cool. Found an article talking all about them in Circle track racing
Leaf Spring Tech - Install - Terminology & Overview - Circle Track

Neat article, covers some of the basics. Some of the information would remain the same for street use, but there has to be some changes for street vs. circle burnin'. Leaf springs are for the most part overlooked for Hot Rod suspension, setting up coilovers is a lot less complex but the chassis tuner in me really likes the added adjustability of leafs, ladder bars, and good shocks!