I have these: 108 mm CV 911 hubs/stub axles. These use the 4 bolt, 2 roll pin CV. I plan to tap them and run 6 bolt.

Looking to verify that to fit them in the 914 trailing arm, all I need are the spacers from Patrick Motorsports. (Yes, and the bearing, funny guy...)

This is for my v8 conversion running a Boxster S trans so it'll have custom axles.

Thanks for the help.

Chris

Is this all I need?

Yes. That's all you need.

I don't know about the stuff you need, but don't replace the drive pins with bolts. Bolts won't hold the sheer force.

I've not seen it written here, but even high power aircraft use drive pins because just bolts are not sufficient.

Wow, thanks for the quick info, Bruce and Joe.
Interesting, too. I was told by a reputable guy that folks regularly lose the roll pins. Maybe I misunderstood but I thought all the late 911s run 6 bolts. Maybe newer ain't always better...?

Chris - You only need the "Inner" spacer. Why custom axles? Late model Carrera work just fine (with a 1/2" spacer on the drive flange). You're making this more difficult than necessary. The outer CV is "built in" on the Carrera axles. No need to deal with the "roll pin" issue... Just sayin.

Tony

Respectfully:

Bolts do hold the shear force, and they do it under tension.

If the 914/4 4-bolt/drive pin arrangement was structurally superior, that arrangement would exist on a 930/911/951/986/996/996TT, etc. However, It does not.

VW set up that arrangement to save money because they were only dealing with 100 hp. If you look at it, the drive pins are thinner than the hardened bolts (in total area). Without the pins being pressed-in on both sides, they create a weak link at that mechanical junction.

My 3.6L 300hp 914 has 911SC hubs with the spacers you've shown. They are connected to 1987 G50 axles attached to a 1984 915 Wevo limited-slip transaxle.

There are no drive pins. Each CV has 6 bolts.

Here's how weak the 6-bolt arrangement is:



http://vid23.photobucket.com/albums/b370/s...e/RSburnout.mp4

Here's how weak the 6-bolt arrangement is:



http://vid23.photobucket.com/albums/b370/s...e/RSburnout.mp4

that all looks pre 74...you don't need a spacer.

No spacer need for the early hubs and stubs.

Thanks for clearing that up. I have early hubs and stubs and sway away axles in a box and didn't think I needed a spacer when I install them.