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Old 08-03-2010, 06:30 PM   #1
groundpounder
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Default hot rod watts link.....

Hey guys!!!...newbie on here!! I wish i started buildin' em sooner!!! question???? building a 32 railed five window hot rod with some of my own suspension theories and ideas...shit, it's hot roddin! Wanna install a watts link on rearend assembly. Using a winters quickchange out of my old dirt latemodel, change bells and tubes to use 5 x4-3/4 hubs. Has any body used the watts link from The Streetrod Manufacturing Co. Inc.??? I think this will work, but having a little trouble understanding how it works??? The pivot point on the housing..Is that two bushings or eccentric besides the center bolt holding the two pivot arms together?? dont know?? is that right???
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Old 08-03-2010, 06:34 PM   #2
Antny
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Default Re: hot rod watts link.....

The center "link" is mounted to the rear axle, in a way that allows it to freely rotate around it's centroid, like a propeller. The two arms get attached to each end of that arm with clevises or heims, etc, and are attached to each frame rail with a clevise, heim, etc. Basically, it centers the rear axle without letting it travel in an 'arc' as viewed from the rear, like a panhard bar does.

In the case of that particular watts link design, the center link has it's connection points in the same plane, not 180 degrees apart like a conventional watts link. Same theory though.

Did I confuse the shit outta you yet? If so, I apologize.
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Old 08-03-2010, 06:35 PM   #3
Johnny Gee
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Default Re: hot rod watts link.....

Drop the question then do an intro. After that ask away.
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Old 08-03-2010, 08:14 PM   #4
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Default Re: hot rod watts link.....

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Originally Posted by Johnny Gee View Post
Drop the question then do an intro. After that ask away.
Lighten up Frances!

Good question. Here's a BTTT for ya!
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Old 08-03-2010, 08:19 PM   #5
Unkl Ian
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Default Re: hot rod watts link.....

Panhard bar is much easier.
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Old 08-03-2010, 11:17 PM   #6
gimpyshotrods
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Default Re: hot rod watts link.....

Make sense now? Not sure how you are going to mount it on a quickchange rear, though. There is nowhere on the front, or the back of the housing that does not have something in the way of where the center pivot would need to go.
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Old 08-03-2010, 11:20 PM   #7
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Default Re: hot rod watts link.....

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Originally Posted by gimpyshotrods View Post

Make sense now? Not sure how you are going to mount it on a quickchange rear, though. There is nowhere on the front, or the back of the housing that does not have something in the way of where the center pivot would need to go.
That was my thoughts. Just run a panhard bar.
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Old 08-03-2010, 11:30 PM   #8
terryr
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Default Re: hot rod watts link.....

With a quick change there won't be room for a watts off the back. You could run it 'backwards', with the ends attached to the axle and the middle to the chassis.
A watts is kind of overkill for this type of vehicle.
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Old 08-04-2010, 12:46 AM   #9
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Default Re: hot rod watts link.....

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Originally Posted by Unkl Ian View Post
Panhard bar is much easier.
But nowhere near as effective for lateral control.....
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Old 08-04-2010, 04:40 AM   #10
groundpounder
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Default Re: hot rod watts link.....

hey guys....after I introduce myself....I do have some racecar suspension knowledge and understand the "watts link". Let me re-ask the question...Has anybody used the watts link sold by TSM manufacturing co.???? Looks like a good unit ..Just dont understand the pivot points. What are the two "bushing like things" on the pinion bracket? Thanks for any help on this unit.......Will mount the watts link off front of Q.C. but have to fab a bracket....thanks again.....
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Old 08-04-2010, 06:32 AM   #11
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Default Re: hot rod watts link.....

Hoerr Racing Products has one that mounts off the nose on the front of a quick change. Pretty slick, center bellcrank rides on a large bushing.
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Old 08-04-2010, 07:35 AM   #12
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Default Re: hot rod watts link.....

good setup, i started to use one in my topolino...but got talked into a triangulated 4 link...for space concerns,,,after all is said and done, kinda wish i had used the watts link...my olds housing had a nice setup in the center for it...and i left it there,,,might change it over, but not till i get to drive it first

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Old 08-04-2010, 08:44 PM   #13
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Default Re: hot rod watts link.....

bttt
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Old 08-04-2010, 11:13 PM   #14
gimpyshotrods
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Default Re: hot rod watts link.....

I finally had a chance to take a look at that particular one. It is a truly unique take on a watts linkage. Everything is there, just expressed in a different functional arrangement.

The two things on the center bracket are indeed bushings. It is where the inner arms pivot. Between them, there is a hole where you see a bolt head. That bolt goes through a round hole in one inner arm, and slot in the other, with a bushing or bearing. This keeps the arms moving in sync with each other. This produces a "mirror" of the force applied to one link, on the other side, keeping the axle centered under side load, as well as up and down, and all possible combination of the two.

Brilliant. Go for it.
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Old 08-05-2010, 12:12 AM   #15
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Default Re: hot rod watts link.....

mine was a long flat stock peice with hole in the center and 2 evenly spaced at the ends...2 rods of equal length with heims joints in all 4 ends...attached to 2 spots on the frame, with one shorter then the other...very simple system
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Old 08-05-2010, 02:22 AM   #16
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Default Re: hot rod watts link.....

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ID:	1048943Here's a couple on some 32 frames I built. Works real good. I have the tires real close to the body and they have never touched it. I changed the modified watts link from a captured bearing design to a constant mesh gear and I think it works smoother with less parts. Had all the stuff waterjetted and use the idea on a lot of different cars with no problems. Hope this helps
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Old 08-05-2010, 02:31 AM   #17
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Default Re: hot rod watts link.....

Oh yeah, with the ratios reworked I get about 3/4" of movement at the pivot end for every 3 1/2" of up and down movement of the rear end. Off camber driveways...no problem. Parallel bumps...no problem. This is a great way to keep the rear where its supposed to be. Works better than any panhard bar design i've ever seen. Not near as bulky as a traditional watts link setup. Hides well. (you literally have to point it out for someone to notice it and a lot of guys dont understand what its doing anyways) I recommend using it
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Old 08-05-2010, 02:53 AM   #18
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Default Re: hot rod watts link.....

NV Rodr... very cool. Do you have a kit? Web site? What diffs will work? Thanx, Gary
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Old 08-05-2010, 07:35 AM   #19
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Default Re: hot rod watts link.....

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Originally Posted by NV rodr View Post
Attachment 1048942

Attachment 1048943Here's a couple on some 32 frames I built. Works real good. I have the tires real close to the body and they have never touched it. I changed the modified watts link from a captured bearing design to a constant mesh gear and I think it works smoother with less parts. Had all the stuff waterjetted and use the idea on a lot of different cars with no problems. Hope this helps
Great to see somebody who 'gets it' and puts it into practice. I have spent years beating my head against a brick wall explaining why the Panhard bar is a monolateral compromise, traveling in an arc, and that a Watts linkage is the way to go. Beautiful workmanship NV rodr

The only problem I have had with using the TSM setup is floor clearance. Their unit with the combined parking brake is a really neat problem solver.
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Old 08-05-2010, 09:37 AM   #20
Johnny Gee
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Default Re: hot rod watts link.....

Quote:
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Lighten up Frances!
Should not have put that apple in front of me Wilber.
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