Using a Boxster Rear Hub for 5 Bolt Conversion, I think it will be EASY |
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Using a Boxster Rear Hub for 5 Bolt Conversion, I think it will be EASY |
914Sixer |
Nov 19 2014, 06:10 PM
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914 Guru Group: Members Posts: 9,005 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region |
We all know that 69-73 911 rear hubs are getting scarce and pricey. I went out on a limb and bought a whole rear 99 Boxster assembly for $41 delivered on EBAY. It is a well known fact that the 914 and the Boxster use the same wheel bearing. So I figured it would be an easy swap. I drove the hub out of the bearing and started the comparison of the two hubs. I had a 69-73 911 rear hub and a -6 stub axle to use as a baseline. The Boxster hub has the same splines as the 911/914-6 stub axle so it was a drop in fit. One down, so I put them side by side to find out they are the same height. Now have two down, the last check was to set the rotors on both hubs to see where we were at. Bingo, they matched up. So the stub, the hub and the height are all the same. HOWEVER, there is one area to be addressed. the -6 stub sticks up about 5mm past the center of the hub. It is going to require a spacer to fill in the area so the washer and nut will tighten down. I am thinking that the one that Patrick Motor sports will do the trick. I think it will be worth trying because I am using Boxster wheels.
Tell me what you think. Attached image(s) |
eeyore |
Jan 27 2015, 01:03 PM
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Senior Member Group: Members Posts: 889 Joined: 8-January 04 From: meridian, id Member No.: 1,533 Region Association: None |
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) |
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