Using a Boxster Rear Hub for 5 Bolt Conversion, I think it will be EASY Options

[914Sixer]

The 964 front hub looks like it may be another option as it uses the same wheel bearing. It would be a matter of finding out what stub axle will work though. It may be an area from some one else to explore.

[pcar916]

Very cool thread.

[Mueller]

The 964 front hub looks like it may be another option as it uses the same wheel bearing. It would be a matter of finding out what stub axle will work though. It may be an area from some one else to explore.

Is that for the C2 or C4?

For as long as I had my 964 C2 I never took it apart luckily!

[a914622]

964 with splines in front should be c4

[913B]

Great job, keep it coming
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[914Sixer]

I am not going to make it to the shop until this coming weekend. I sprained my wrist and hyper extended my thumb. It does not look like the Boxster axle or stub will be an option. Might be a source for used 110mm cv joints though.

[Amenson]

...HOWEVER, there is one area to be addressed. the -6 stub sticks up about 5mm past the center of the hub.

...

Does the 911 stub also have the 5mm stickup or just the -6?

I just brought home a set of 108mm cv axles with the stubs on, now I am jonesing to order Boxter hubs.

Cheers,
Scott

[Amenson]

Really jonesing so I went looking for more info and found this:

Hubcentric Hubs with 911 Stubs for Sale

No mention of spacers or machining.
Does this really work?

Cheers,
Scott

[914Sixer]

Yes, the 911 stub axle sticks up the same amount as the -6 stub.

[3d914]

Great job. Thanks. Keep the details coming!

[El Vikingo Tropical]

You can see her what you will need:
http://www.patrickmotorsports.com/part/914...conversion-kit/

[Amenson]

I had thought that also but Patrick Motorsports has the note:
"THIS ITEM IS DESIGNED FOR USE WITH 5 LUG CARRERA AXLE FLANGE"

My understanding is that the Carrera uses a differnt (wider) bearing and therefore requires the spacers for preload and to put the brake rotor in the correct plane.

http://www.914world.com/bbs2/index.php?act...=2&t=234009

Isn't the advantage of the Boxster part that it uses the same bearing and therefore could be used w/o spacers?

So much information in so many different places. (IMG:style_emoticons/default/blink.gif)

Cheers,
Scott

[CptTripps]

Just a question: Are the Boxster parts better/cheaper than the Carrera parts? There seems to be no shortage of them out there.

[914Sixer]

Whole rear Boxster hub assemblies can be had for less that $50 shipped on Ebay. You will have about 5 lbs of scrap aluminum when you are done.

[914Sixer]

Ok, here is the last of what I have found out using the Boxster and later 993 axles. The 911 and Boxster axle are the same length, are hollow tubed and use a 28 spline. The 911 axle is 32 mm thick and the Boxster is 28mm thick. Both are to long for 914 use. The Boxster S inner CV is a 911.332.030.01 , 108mm and 32mm thick. It is used in bunch of Porsche applications including the 930 Turbo. The 911 inner CV only had a Lobro part 7253150199001 and it is only 28mm thick. Both CV's used a 928.332.293.02 boot.

I had some 110mm 911 stub axles so I bolted the CV's up. I see no reason why the CV would not work for this application with joint gasket.

The outer stubs are a completely different item. The flanges are crimped on and no replacements are available. CV joint cup could be machined off and holes drilled. Not cost effective to use them. The overall height is the same but each is machined differently.

In summation the only useable part would be the Boxster hub. The 914-6 rotor would have to be drilled and screw holes countersunk to allow the hub to be screwed to the hub. The 911/944 stub axle will required a 8mm spacer at the top of the stub axle so it can be tightened down.

So, I spent some money and learned some new information. It seemed like a good plan at the time but NOT worth the cost of modification required to make it all work.

[CptTripps]

Thanks for the intel Mark. Looks like we can put this one to bed then.

[Randal]

This could be a very productive thread. Nice job.

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+ 1 on Woody.

Just a heads up any big type 4, like mine or Woody's will destroy a stock set of CV's in one autox. Haven't yet destroyed a 944CV. (IMG:style_emoticons/default/smilie_pokal.gif)

[Amenson]

I am still planning to use the hubs. Still cheaper than tracking down early 911 hubs plus the hub centric benefit.

[914GTSTI]

I know i'm going to get flamed but will the 4 lug wheel, cv stub fit into the boxer hub ? I know this would not give the bigger CV. I have not pulled down one yet to look at the stub.
Thanks,Randy

[eeyore]

There are some variations on this:
The 986/996 use the same hub at the front with a stub axle. That front stub axle is not drilled for CV, it just has the ABS reluctor/exciter sawtooth cuts. That would be a better starting point for conversion item (i.e. welding on a 6 bolt CV flange)

Patrick Motorsports used to sell a set of washers to use the wider, later 911 hubs/stubs in a 914 trailing arm. The P/Ns were something like PMPCSPI and PMPCSPO. I don't know if that changes the CV or brake rotor offsets.

Apparently, you can use the later hubs and the wider axle bearing in the 914 trailing arm, you need a specially machined bearing retainer plate that is countersunk to deal with the excess width. Maybe Patrick makes something for that, too. (Same disclaimer about CV and rotor offsets)