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Author Topic:   Anyone ever tried the "Fasboys" leaf setup
Dirt Freak

Total posts: 263
posted April 18, 2005 03:49 PM  
Just wondering if anyone has ever tried this setup with their leafs...on a street stock, not a modified. Got any opinions? I was debating on trying this setup and just wanted to know what ya'll thought about it. Thanks.


Dirt Full Roller

Total posts: 40
posted April 18, 2005 06:33 PM  
look under mods at my post, youll know exactly where Im at with my version of the fastboys set up...

It isnt working yet but I havent given up..

Dirt Maniac

Total posts: 131
posted April 18, 2005 08:40 PM  
what is the fastboys setup?

Dirt Freak

Total posts: 263
posted April 19, 2005 05:20 PM  
The setup is typically used as a mod setup that uses a stacked LR leaf w/ a monoleaf and coilover on the RR. Here's what you do...

Take apart your LR leaf and rearch the front of the main leaf until it is around 8.5" from the center pin to the ground (when upside down).

Then slide the 2nd leaf foward until it is even with the front spring eye and rearch it so is sits about 2" below the spring eye. Redrill the center pin hole.

Next, turn your 3rd leaf 180 degrees so the front of the leaf is below the front spring eye also. Rearch it to 2" below the front spring eye. You don't have to redrill the center-pin hole on this leaf.

For a mod, it's better to throw away the 4th leaf but on a heavier car like a street stock it'd probably be better to leave it in.

Put the leaf back together and band the front. Leave the back of the leaf unbanded.

Basically, what this set up does is promote a lot of forward bite because the spring is always trying to pushing the tire into the ground. You have effectively stiffened the front of the spring while lowering the overall spring rate. Another added bonus is that the leaf is always trying to rearch itself which helps you get a lot more races out of it.

Clear as mud?


[This message has been edited by justin (edited April 19, 2005).]

Dirt Maniac

Total posts: 107
posted April 19, 2005 06:10 PM  
have you got a picture?

Dirt Maniac

Total posts: 192
posted April 20, 2005 09:31 AM  
If you cant run a mono coil on the right rear, the only thing floating the RR will do is tighten you up. Its seems by floating the RR with two stack leafs that your taking away traction. It actually doesnt take away traction as much as it moves it more over to the left side of the car.

Unlike what some may say, the rear end is still can try to wrap the same amount and instead of it being share the left rear take more of the torque. The floated right rear will also gain some side bite. How? Because since the spring is not wraping now, the rear of the spring not unloading which will push the right rear down hard. May be hard to understand but its actually basic geometry.

The FastBoys gain their edge by using a high arch LR, then setting the 10" shackle at about a 42 degree back lay on the left rear and putting a clamped coil spring behind the axle on the right rear. When the car rolls, the weight pushes on the right rear. With this coil spring clamped behind and the leaf floated on the right side, the coil tries to twist the pinion up which helps load the LR which is clamped to the axle.

We were told to leave the mono unhooked when setting (rides heights and scaling) up the car because is acts more like a helper and located device for the rear end. When your done scaling, put it in the closet hole on the shackle. Some guys even use a zlink on the RR instead of the mono leaf with everthing else the same.

If you have any more questions, i can try to help ya. Im playing with a 3link outlaw street stock, pure stock bomber, a stub car on this setup, and a GRT late model right now. We having alot of fun. I think my scales go "What the ..." every time a different car climbs on. Just cant wait til everyone decides on one class and one setup. LOL


[This message has been edited by dirtrace54 (edited April 20, 2005).]

Dirt Freak

Total posts: 263
posted April 20, 2005 03:53 PM  
The RR is a stacked leaf, can't run a floater on the RR.



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