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Old September 25th, 2010, 08:09 AM   #1
ScOoTeR
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oh boy - question on doing coilovers...for the street.

I need to shorten the wheelbase on my 66 C10 2wd by 3" - it is a trailing arm design and the arms are damn - near five feet long.

Looks like this:


The stock trailing arms can't really be modified for what I want to do - which is (basically) swap where the axle and springs mount (put springs behind axle after I move axle 3" forward). I have plenty of room above the axle to do this, frame-wise, but wonder what I'm going to do to my geometry by effectively shortening the length of the trailing arm by 3" (about 6%). I was also thinking of getting some "universal" coilovers and using those instead of OEM -style springs. I'd have much more freedom for ride height and damping options.

I think I can build new trailing arms with provisions for the coilovers and have the rear driveshaft shortened and be G2G.


Ideas/opinions/suggestions?
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Old September 25th, 2010, 08:29 AM   #2
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is there room to move the mounts forward 3" on the frame and keep the stock suspension? then shorten your DS.
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Old September 25th, 2010, 09:03 AM   #3
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is there room to move the mounts forward 3" on the frame and keep the stock suspension? then shorten your DS.
Can't do it with the stock arms - if I build new ones, I could literally swap the spring and axle locations and probably get by. Tell ya the truth, I'm digging the coilover idea, just for the adjustability.

I would just build an extra crossmember above the coilovers to mount them to:


A bit more beefy, but a heckuva lot like this setup.
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Old September 25th, 2010, 10:25 AM   #4
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You can do anything if you put your mind to it!


Shortening the radius arms that much isntgoing to be noticeable. If you turn it into a 4 link then I'd shorten the links up a lot or it's going to be a huge PITA. I wouldn't make the links much more than 24" long. For the springs, make a mount off the back side of the axle and position them how you want and then make a cross-member as needed.
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Old September 25th, 2010, 02:15 PM   #5
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Sweet.

Keeping the two uber-long trailing arm design, so I should be golden. Now to start research on extended vs. compressed lengths, spring rates, damping settings, etc...

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Old September 25th, 2010, 06:58 PM   #6
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A 6 or 8" coilover will be more than enough. Figure on 4" of bump travel if you want a nice ride, you can get away with 3" but you'll need bump stops. Since you are keeping the radius arms you can play with the motion ratio to get your rates and travels dialed in if you can't get the exact rates you need.

Before you take it apart, take some measurements on whats there. Spring free length, length at ride height, lengths on the radius arm, total travel, etc. It'll make everything later on easier.
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Old September 25th, 2010, 07:26 PM   #7
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Thank you!
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Old September 25th, 2010, 07:49 PM   #8
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Ditch the coils and put airbags on it.
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Old September 25th, 2010, 08:18 PM   #9
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Shaddap. I got a bag for you, Mister. I'll bag the C10 when you drop your dually or give up your dream of a 4x4 7.3L E250.

(in other words: ain't gonna do it)
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Old September 25th, 2010, 10:06 PM   #10
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i think i have the answer....



put the old box back on, it looked better anyway


seriously, build it so you can drop it to the ground or hual a 14 bolt home...air bag it.

a couple rod ends, 8 ft of DOM, move the spring mounts and be done
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Old September 25th, 2010, 11:21 PM   #11
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You probably wont even notice 3" shorter trailing arms.
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Old September 26th, 2010, 01:23 AM   #12
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Quote:
Originally Posted by bacongrease View Post
i think i have the answer....



put the old box back on, it looked better anyway


seriously, build it so you can drop it to the ground or hual a 14 bolt home...air bag it.

a couple rod ends, 8 ft of DOM, move the spring mounts and be done
Bags == hassle.

decent air pump
5 gal storage
valving

LOL, I dig the new box - even more now that I know people don't like it
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Old September 26th, 2010, 07:50 PM   #13
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heres what you do, put the bed back where it was and in the space between the cab and bed you install a sweet set of stacks. like these. problem solved
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Old September 27th, 2010, 08:23 AM   #14
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heres what you do, put the bed back where it was and in the space between the cab and bed you install a sweet set of stacks. like these. problem solved
I cut 6" off the rear of my frame & now you tell me.
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