Porsche 944 axles and 944 CV's for Vanagons

Jahbah · Posted: Wed Aug 20, 2014 6:41 pm Post subject:

Soooo Captain Slider
I'm curious about the pitted cv. Which one was it that got messed up? Seeing that you cut the extra clip and mounted the axles backwards I'm less concerned about the axles. But the pit in the cv has me curious. I think I'm going to trial them and perhaps up grade them to lobros if they fail. How long did you run the axle backwards before it snapped? How long on the cv's mounted backwards? I hear you say the clacked from day one, were they clocked and were they mounted backwards initially or upon rebuilding them. I'm seriously down the rabbit hole reading up on axle options, and anyone's advice would be sweet! Thanks for the info and reply Jon.
Cheers
D
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Jon_slider · Posted: Wed Aug 20, 2014 7:16 pm Post subject:

I don't remember how many miles I ran the empi setup, guessing maybe 5k miles or less. Yes the CV's were clocked.

The axles got switched (causing reverse twist) and ran about 200 miles on pavement, then snapped the first time I spun a wheel after I went <20 miles Offroad.

The pit was a surprise with such low miles. I could speculate pitting was accelerated by the loose "Offroad" clearance, and that the clacking noise was the balls hammering the races of the joint, not sure. It might also be inconsistent or impure metallurgy (a favorite accusation of china bashers).

So, loose fit, noise, and early pitting of the Cv. Plus snapped axle after switching sides created reverse twist, when challenged by light Offroading wheelspin.
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Jahbah · Posted: Fri Aug 22, 2014 6:28 pm Post subject:

After doing so further research I've calculated the necessary axle length.
Based on this link...
http://www.swayaway.net/joomla/images/InstallInstructions/AxleLengthMeasurementInstructions.pdf

You can figure out what kind of axle length you require base on your lift and shock length. My van requires at least a 21 5/8th minimum and could take a 22" axle. I think the empi 21 3/8 is a hair to short for my application, especially at more extreme angles the cvs could be forced into. I'm going to purchase longer axles and see if that helps with the cv clacking and life of the joints and axles. Hopefully the longer axle will prevent the balls of the cv from getting pulled to the edge of the race. Keeping the inner star of the cv joint centered should hopefully give the joint a longer and happier life. It's not quite science but its all fun!
Ill report back when I try it out.
Jahbah
_________________
'87 Westfalia Weekender + '86 Syncro Tintop +'02 Impreza 2.5RS
= '86.5 SuperWestySyncroSubyWeekendermobileagon =
Bueno.
Jahbah~D

bosruten · Samba Member Joined: February 11, 2011 Posts: 550

Quick question on this topic. I measured using Jon's instructions and get 19.5". I'm wondering if using my old axles and upgrading the cv's with van cafe's 16" CV's would work and what CV's these are? I like Burls front axles also.
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'87 Syncro Weekender

zeohsix · Posted: Tue Sep 09, 2014 9:50 pm Post subject:

bosruten · Samba Member Joined: February 11, 2011 Posts: 550

Thanks, I'm going to order Burl's and be done with it! Smile

Oh...will running his set up front require any changes to my rear axle set up?
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'87 Syncro Weekender

Jon_slider · Posted: Wed Sep 10, 2014 9:49 am Post subject:

Farfrumwork · Posted: Wed Sep 10, 2014 11:15 am Post subject:

Just another data point (although not with a long history behind it)

I have the 'off road' empi CV's and torsional axles in the rear. ~7000mi or so on them, with all kinds of use in there. I don't go crazy off road, but have had it on 3 wheels more than a few times (with a locked rear)

The CV's are not clattery and all is fine (so far).

I clocked them when I assembled them as well.

The first ~4000mi was in 2wd configuration @ 17.5" ride height (with a EJ22). The last ~3000mi have been in 4wd config @ 19.5" ride height (with a EJ25).

tires = 27" grabber AT2
Weekender = not quite as heavy as some full syncro westy's

interetsing - a stock rear axle blew up several years ago after raising the rear ride height from stock (~200k mi) by ~1in. Tore the cage apart - lots of noise

YMMV (and my CV's might just blow up tomorrow Mad

)
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Jon_slider · Posted: Wed Sep 10, 2014 11:57 am Post subject:

bosruten · Samba Member Joined: February 11, 2011 Posts: 550

Farfrumwork · Posted: Wed Sep 10, 2014 3:32 pm Post subject:

4x4BNB · Posted: Wed Oct 08, 2014 7:42 pm Post subject:

zeohsix · Posted: Wed Oct 08, 2014 8:16 pm Post subject:

Who makes 16" axels....several sources.....Empi ( hencho en China ) Sway Away ( hencho en USA made from same people who supply the Indy 500 racers and others like Burley Motorsports about 4 times the cost of Empi ) as far as dimensions you will have to come up with those yourself if your not capable of doing that then, I suggest you check with a well known Samba parts vendor who specializes in Syncro parts.
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I'm Cheap! I'll build that Syncro Westy myself and save money but, my labor is "FREE" especially if I ever go to sell it! One thing is I will know the quality of the parts and labor that went into the build and rest better when I'm actually driving said Westy down the road!

Jon_slider · Posted: Wed Oct 08, 2014 8:52 pm Post subject:

4x4BNB · Posted: Thu Oct 09, 2014 6:10 am Post subject:

So for now, my stock sized lobro cv's should work with 944 axles? Then I f I need to later, I can replace my cv's with 944 cv's?

Jon_slider · Posted: Thu Oct 09, 2014 9:28 am Post subject:

Tony_de_whitt · Posted: Sat Nov 01, 2014 6:33 am Post subject:

Does anyone know where I could buy the 944 driveshaft and cv complete.

Thx

Jon_slider · Posted: Sat Nov 01, 2014 10:14 am Post subject:

Tony_de_whitt · Posted: Wed Nov 12, 2014 6:57 am Post subject:

Thx jon slider

Sorry ive been away.
Running an ej22 and just put progressive springs on.

I didnt change shocks and was running old man emu shocks which are the only ones i could get to fit here in perth at the time.

Once new springs were put on i found my shocks to be fully extended and rather an uncomfortable ride.

I was concerned if i changed shocks and not cvs i would be over articulating them. Hence I started looking at my options.

Plus the fact I bought the heavy duty springs as when fully loaded with family we are a bit on the heavy side.

Currently I'm rebuilding my interior so syncro is empty Sad

hence sitting in the highest possible position if you follow me.

A friend had done the same and had popped 2 cvs in a week.

So ive changed cvs (944) and put land rover shocks on so far so good.

I will try and get a measurement. So from the centre of the wheel to the underside of the wheel arch?

I ended up using the original vw driveshafts with the 944 cvs and hoping all will be good.

Cheers

Jon_slider · Posted: Wed Nov 12, 2014 10:34 am Post subject:


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Porsche 944 axles and 944 CV's for Vanagons
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