69 911 T...Rear Swaybar options.

[rennch]

Hey there,

My 69 T doesn't have rear swaybar mounts. Do I have any other options to install a rear swaybar other than to weld on the swaybar mounts and get aluminum trailing arms to install?

I want a large, adjustable bar so I can race it...

[Shoepop]

No way getting around welding in a mount but no need to change or do anything to your stock 69 trailing arms if you go old style Weltmeister style adjustable SB.

[rennch]

I don't mind welding in the mounts. Does the old style Weltmeister (Which I just sold, ironically enough) just clamp on to the trailing arms?

[Shoepop]

Nothing clamps or is done to the trailing arm or spring plate. The kit comes with eccentric bolts with a mounting studs to attach the drop links. This replaces the factory eccentric used to adjust camber.

[rennch]

That's funny. That's exactly what I just sold. Sigh...

Thanks!

[Shoepop]

Figures don't it . I need to correct, the threaded stud in the pic is not what the drop link attaches to, the other end is threaded female and that is what the bolt for the swivel rod ends on the drop link screws into.

[911pcars]

IMHO, this area is one of the weak points of the rear WM bar. The threads on the eccentric bolt are merely 5/16-18, pretty marginal to carry large cornering loads. Your lighter long hood chassis may not overstress this mount though. If you can manage, try to get a set of eccentric adapters for the Tarrett rear sway bar, They used a beefier, 3/8" thread.

Sherwood

[rennch]

Well, why wouldn't I just get a Tarret Swaybar?

[911pcars]

Originally Posted by emptyo

Well, why wouldn't I just get a Tarret Swaybar?

Price? Overkill? Just for the eccentrics? Otherwise, the Tarrett bar is very nice.

Sherwood

[Robert Shafer]

Why do you need a resr swaybar on a car that oversteers? Bob

[ttweed]

Originally Posted by emptyo

My 69 T doesn't have rear swaybar mounts. Do I have any other options to install a rear swaybar other than to weld on the swaybar mounts and get aluminum trailing arms to install?

There are two issues involved here, and I only see one being addressed, namely the droplink connection issue. There is an alternative to welding on the RARB consoles as used in the Weltmeister setup, which is clamping the consoles to the torsion tube with big U-bolts instead of welding them to the unibody, as Porsche did. I have never used this method, but Weltmeister has sold a lot of kits like this in the aftermarket to allow a non-welded installation.

[HarryD]

Originally Posted by ttweed

There are two issues involved here, and I only see one being addressed, namely the droplink connection issue. There is an alternative to welding on the RARB consoles as used in the Weltmeister setup, which is clamping the consoles to the torsion tube with big U-bolts instead of welding them to the unibody, as Porsche did. I have never used this method, but Weltmeister has sold a lot of kits like this in the aftermarket to allow a non-welded installation.

Sherwood,

I used the Welty solution on my 911. Seems to be ok even if I needed to compromise due tot he location of my fuel filter.

Read bout it here:

adjustable sway bars...1971 chassis

and here:

http://forums.pelicanparts.com/porsche-911-technical-forum/326008-installing-weltmeister-rear-swaybar-clamps-post3052124.html?highlight=rear+sway#post3052124

The modified eccentric that Weltmeister makes to connect the drop links to the bar are not the greatest quality. When I installed my bar, I stripped one due to an apparent casting defect. My machine shop made a replacement to get me on the road. I believe the Tarrett ones may be better.

[rennch]

Originally Posted by 911pcars

Price? Overkill? Just for the eccentrics? Otherwise, the Tarrett bar is very nice.

Sherwood

I'm in no hurry to spend any money I don't need to. Any other recommendations?

[rennch]

Originally Posted by Robert Shafer

Why do you need a resr swaybar on a car that oversteers? Bob

Well, I'll be autocrossing it, and at the moment I have 315's in the rear. I would be excited if I could get it to oversteer on demand.

[gestalt1]

i think the tarret design is similar to the welt. eccentric bolt but it is an eccentric nut. the nut has a hole drilled through it off-center so it can act as an adjuster. the hole is for a through bolt that connects the drop link. very similar in design/function but because a high grade bolt is used rather than the integral stud on the welt. unit it is stronger. (i assume). i'm planning on leaving off the rear sway on my 68, if i need the sway i'll use the welt torsion tube mounts to add the sway. i think the rear sway can be small (15mm) if larger torsion bars are used. this is purely speculative however.

[911pcars]

Originally Posted by gestalt1

i think the tarret design is similar to the welt. eccentric bolt but it is an eccentric nut. the nut has a hole drilled through it off-center so it can act as an adjuster. the hole is for a through bolt that connects the drop link. very similar in design/function but because a high grade bolt is used rather than the integral stud on the welt. unit it is stronger. (i assume). i'm planning on leaving off the rear sway on my 68, if i need the sway i'll use the welt torsion tube mounts to add the sway. i think the rear sway can be small (15mm) if larger torsion bars are used. this is purely speculative however.

The description of the Tarrett version is right on. However, the integral stud on the WM eccecntric isn't the weak point I was referrring to. It's on the opposite side; the female threaded boss allows the drop link rod end to attach to the eccentric. In WM's defense, they supply a fairly strong, heat-treated 5/16" socket head machine screw (stronger than hex), but the OD is small. IMO, it should be larger.

As an aside, it'd be nice if the WM upper drop links used a rod end too instead of a rubber bushing.

Sherwood

[304065]

Weltmeister is bad.

If you want to race, buy the WEVO ARB mounts and the smart racing bar.

[calling911]

Besides... even if you arent fast oversteer makes you FEEL fast.. and there is something to be said about that... (I am not joking). I think oversteer below 50 mph is wonderful thing.. the kink at road america comes to mind however.. LOL..

[911pcars]

Originally Posted by john_cramer

Weltmeister is bad.

If you want to race, buy the WEVO ARB mounts and the smart racing bar.

John,
I would tend to disagree with your assessment about WM. Have you seen the Addco bars?

The WM is functional, probably overpriced for what it is, but it was the only game in town for a number of years. And you know what happens when there's no competition. There are probably thousands of WM bars doing their functional job as we speak. Are there better ones? Yes, but at almost twice the price. Are there better ones for the price? I haven't seen any. With some slight revisions, the WM bar could be better than it is now.

Sherwood
no affiliation

[rennch]

Thanks for the debate guys...I don't actually know what I'll do yet. I can put a stock bar on from the 72T for now. I'm running 21-27 torsion bars, and I have big tires...