?'s on older 4wd chevys

Mike_HKmtrsprts

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?\'s on older 4wd chevys

has anyone built or seen older 4wd chevys straight axel built like say a 73' my friend wants to built one but I have no idea how much travel they can get and how well to do they do in the dirt and what you have to do to the front drive shaft to allow for more travel he wants to run deavers with a 2.5 bypass and air bump at everycorner, please give me some answers so I can relay them onto him thanks....Mike
 

Waldo

Safehouse
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Re: ?\'s on older 4wd chevys

Dude, I see them all the time in Off-Road Mag or Four Wheeler...J/K

Aren't you pretty much limited to what the springs will do as far as travel goes? A friend of mine built a '69 Blazer. He put Nationals all the way around with Rancho 9000's and it worked "OK" in the dirt. It was handled pretty crazy when he tried to go fast in whoops. But for playing around and driving to Competition hill at night, the thing worked great!

BRAAAAAAAAP!
 

JrSyko

Jerry Maguire
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Re: ?\'s on older 4wd chevys

Mike Macomas over at Ace Motorsports used to race an older straight axle chevy 4x4. In fact it was out racing at Laughlin this year. It broke its transfer case the first day but they fixed it and it ran strong the second day. I'm not sure what place it finished but it looked good. A guy with the first name of Travis drove it but I can't remember his last name. You should give Mike a call. He owns a body shop out in Hemet and preps Marc Steins Expedition.

Lets F*%KING RAGE!
 

Bob_Sheaves

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Re: ?\'s on older 4wd chevys

Hi Mike-

The short form answers (assuming a "street piece" and not a race car) are as follows:

Ft springs- Get Deaver's or Nationals at about 400#/in rate at ride height and a 4" lift at ride height.
Rear springs- Get Deaver's or nationals at about 350#/in rate at ride height and a 4.5" lift at ride height.
Front shocks- 3" Kings with their standard valving and bypass- 12" if mounting close to OE axle location
Rear shocks- 2.5" Kings w/std valving and bypass
Set jounce stops to bottom out with 1.5" travel left in shocks to prevent bottoming out the shocks front and rear.

Remove front (and rear- if equipped) sway bars if using above spring rates- do NOT remove if less rate in either location.

Fabricate left frame mount track (panhard) rod from Dodge BR/3500 and convert steering linkage to transverse links drag link with Haltenberger type linkage. for front axle.

More info if you need it-PM me.

Best as always,

Bob Sheaves
 

Kritter

Krittro Campbell
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Re: ?\'s on older 4wd chevys

Bob has it down. My dad used to have a 69, 72, and 79 Blazer when he was in a Blazer club and he had springs front and rear and a bilstein and I remember it working pretty good. It went anywhere. I dont recall any hi speed desert running but for playing around it was more then enough.


Kris

<A target="_blank" HREF=http://www.dmsrace.com>www.dmsrace.com</A>
 

drtdevil93

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Re: ?\'s on older 4wd chevys

we have a long travel setup we do that works great. we have one at the shop right now if you want to come take a look at it. i might be wrong, but i think the truck you guys are referring to has our setup. we make the spring about 6" longer, relocate the shackle and box in the frame at the shackle point. we havent cycled it, but i believe it does around 12" of travel in front. and we did something similar with the rear, and it puts out about 16". weve done i think 4 of these now, so there are a few of them out there. come take a look, its pretty bitchin work.

erik
 

drtdevil93

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Re: ?\'s on older 4wd chevys

you know, ill take some pictures tomorrow and post them. the truck is also being shot for a feature in off-road. the next one we do is one of our workers, lance, and him and i came up with some new ideas we are going to try to make it even better.

erik
 

Bob_Sheaves

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Re: ?\'s on older 4wd chevys

Hi Erik,

Actually, the cars I was referring to were a couple of Scout chase trucks we had back at International Harvester in 77 or 78. We took 2 Scout 118" wheelbase (the Traveler for crew and the Terra for parts) and made a bunch of changes for the chase cars. As I remember, we also flipped the front springs end to end (put the end links at the rear of the front springs), used military wraps on the front end of the springs and did some other stuff like angling the rear leafs front to rear to decrease the oversteer from the revised geometry......I interpolated that information for the larger K5's.

We had about 12-13" of front travel and about 15 for the rear.

Also, on the front propshaft changes...grind away the cast in stops in the double cardan centerlink and on the shaft yoke/end yoke to increase the travel. One bit of warning- you WILL get more vibration out of the shaft at maximum travel, due to the increased limits

BTW- you guys DO make bitchin' parts!

Best as always,

Bob
 

Flea

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Re: ?\'s on older 4wd chevys

there is a really nice chevy around where i live with twin traction beams and a set of coilovers and bypass shocks in front. the thing looks all mellow with no fiberglass, then you look underneith and its got long heimed radius arms and some nice shocks. Sweet truck! It looks like a 95 but I'm sure you can find a way to swap traction beams on a older chevy. Just a thought?
 

Chris_Wilson

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Re: ?\'s on older 4wd chevys

What are the pros and cons of the military wrap design?
 

Kritter

Krittro Campbell
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Re: ?\'s on older 4wd chevys

less chance of failiure when the springs wrap.

Kris

<A target="_blank" HREF=http://www.dmsrace.com>www.dmsrace.com</A>
 

Chris_Wilson

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Re: ?\'s on older 4wd chevys

And no penalty for this added strength? (Compliance, progression, stiction all the same?)
 

Bob_Sheaves

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Re: ?\'s on older 4wd chevys

Hi Chris....

Basically, the wrap just affects the eye area. Instead of breaking one leaf to lose a spring, you have to break 2 leafs. there is a clearance gap to allow for motion (they are not tight to the main leaf).

Best regards,

Bob Sheaves
 

ntsqd

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Re: ?\'s on older 4wd chevys

What a bonus !! I just bought a '79 3/4t 4wd Sub for hauling stuff around. It's dead stock, but not for long, I'm saving this thread for future ref.

TS

"Teach you all I know and you're still stupid"
-- Howdy Lee
 

drtdevil93

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Re: ?\'s on older 4wd chevys

heres the frontend
 

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drtdevil93

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Re: ?\'s on older 4wd chevys

oh, bob, when i said the truck had our setup i meant the mike macoimas (sp?) one.

erik
 

COChev

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Re: ?\'s on older 4wd chevys

i see you guys are running the rear shackle the stock way- tension. what do you think of doing a shackle flip -compression? would allow you to run springs that are less arched and therefore not as stiff.
 
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