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914World.com _ 914World Garage _ VW / Porsche CV joint compatibility

Posted by: mkincaid Oct 20 2009, 01:41 PM

I'm trying to build a custom street rod with a 914 5 speed and vw axles and outboard bearings/stub axles.

My question is, do the VW cv's bolt to the porsche output flange?

If not, what would be the easiest way to mate VW outboard drive components to porsche inboard drive components?

Ideas: Replace the output flange on the trans? replace the flange on the outboard and use porsche axles/joints? Weld a porsche half shaft to a VW half shaft (eww)?

I'm hoping it just bolts up. :/

Thanks!

Posted by: Travis Neff Oct 20 2009, 01:45 PM

Eric Shea converts the vw bearings for use on the 914, he drills out in installs the required roll pins. www.pmbperformance.com

Posted by: mkincaid Oct 20 2009, 02:18 PM

Just to be clear what i'm trying to do. I'm essentially trying to install a 914 transmission into a 70's VW bug. So same outboards, axles, cv joints, just with the 914 transmission (mid engine).

This is not actually what i'm doing, because that would be insanity. But for all intentions of this thread, that is what i'm doing.

Posted by: tat2dphreak Oct 20 2009, 02:21 PM

it's not that insane, but using a 901 out of a 911 will be easier, so you don't have 5 gears in reverse

Posted by: tradisrad Oct 20 2009, 02:23 PM

my understanding is that the VW uses 6 bolts and the 914 uses 4 bolts and 2 roll pins. What I think people are doing is enlarging two of the bolt holes in the VW CV and installing the roll pins.

Posted by: tat2dphreak Oct 20 2009, 03:16 PM

QUOTE(tradisrad @ Oct 20 2009, 03:23 PM)

my understanding is that the VW uses 6 bolts and the 914 uses 4 bolts and 2 roll pins. What I think people are doing is enlarging two of the bolt holes in the VW CV and installing the roll pins.

Posted by: mkincaid Oct 20 2009, 04:14 PM

I've read this too. Thank you.

So other than the bolts and pins. The flange and bolt pattern diameters are ok?

I really wish i had these parts in front of me at this point.

Thanks again.

Posted by: GS Guy Oct 20 2009, 04:29 PM

At least 3 or 4 on-line articles dealing with what you're wanting to do - use a Porsche trans in a VW Beetle based car.

Here's a start:
http://www.blindchickenracing.com/How_to/CVJoints_Axles/cv_joints_101.htm

Oops, just realized they don't include the 914 CV! Pretty sure it's almost same as a T1, except for 2 roll pins replace two opposing bolt locations?

Jeff