Hub-centric 5 lug |
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Hub-centric 5 lug |
gms |
Apr 13 2014, 08:04 AM
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#1
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Advanced Member Group: Members Posts: 2,695 Joined: 12-March 04 From: Chicagoland Member No.: 1,785 Region Association: Upper MidWest |
mount up on lathe
Stock version on left Attached image(s) |
CptTripps |
Apr 13 2014, 02:25 PM
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#2
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:: Punch and Pie :: Group: Members Posts: 3,584 Joined: 26-December 04 From: Mentor, OH Member No.: 3,342 Region Association: Upper MidWest |
This is timely. I think I'm fighting what this fixes...
I put my 5-lug rears on yesterday and they're just a LITTLE lose. I was thinking I needed a spacer, but taking 5mm off the back might be easier. I can have a machine shop take that off. https://www.youtube.com/watch?v=Lw9jVBF2lOQ |
jaxdream |
Apr 13 2014, 05:38 PM
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#3
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Senior Member Group: Members Posts: 974 Joined: 8-July 08 From: North Central Tennessee Member No.: 9,270 Region Association: South East States |
This is timely. I think I'm fighting what this fixes... I put my 5-lug rears on yesterday and they're just a LITTLE lose. I was thinking I needed a spacer, but taking 5mm off the back might be easier. I can have a machine shop take that off. https://www.youtube.com/watch?v=Lw9jVBF2lOQ If you pull those hubs you might stand a chance of destroying the wheel bearings . to tighten up put a spacer ( possibly 4-5mm ) on the backside of the stub up against the inner bearing race between the flange of the stub where the cv mounts, other wise source another set of wheel bearings just in case . YMMV....... Jack |
CptTripps |
Apr 14 2014, 09:25 AM
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#4
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:: Punch and Pie :: Group: Members Posts: 3,584 Joined: 26-December 04 From: Mentor, OH Member No.: 3,342 Region Association: Upper MidWest |
If you pull those hubs you might stand a chance of destroying the wheel bearings . to tighten up put a spacer ( possibly 4-5mm ) on the backside of the stub up against the inner bearing race between the flange of the stub where the cv mounts, other wise source another set of wheel bearings just in case . YMMV....... The hubs actually come out relatively easy. (Not just "pull out" but I can get them in/out without the press.) I've already called PMS about 2 spacers and will see if I can get them here quickly. |
mskala |
Apr 14 2014, 09:47 AM
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#5
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R Group: Members Posts: 1,925 Joined: 2-January 03 From: Massachusetts Member No.: 79 Region Association: None |
Took me a while to realize this is about modifying a later-model part.
But what is the point of this? Trying to gain 5mm clearance at the expense of modifying brake mounting? |
SirAndy |
Apr 14 2014, 11:40 AM
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#6
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Resident German Group: Admin Posts: 41,636 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
But what is the point of this? The point is to have hub centric hubs so you don't have to rely on the wheel studs to center your wheel ... (IMG:style_emoticons/default/shades.gif) |
mskala |
Apr 14 2014, 12:58 PM
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#7
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R Group: Members Posts: 1,925 Joined: 2-January 03 From: Massachusetts Member No.: 79 Region Association: None |
But what is the point of this? The point is to have hub centric hubs so you don't have to rely on the wheel studs to center your wheel ... (IMG:style_emoticons/default/shades.gif) However, you already have the studs there, which will center the wheel. I don't see any mod to the part to make it threaded for using wheel bolts. (IMG:style_emoticons/default/confused24.gif) |
SirAndy |
Apr 14 2014, 01:03 PM
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#8
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Resident German Group: Admin Posts: 41,636 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
However, you already have the studs there, which will center the wheel. I don't see any mod to the part to make it threaded for using wheel bolts. (IMG:style_emoticons/default/confused24.gif) You lost me there ... Wheel bolts???? The point is that with even with 5 studs, you're relying on those to center your wheels when tightened and there is a chance that you'll torque down your wheels slightly off center and create a wheel imbalance. The inner 3 piece ring on the new hub shown in this thread makes sure that the wheel is completely centered. Hub centric they call them for that reason. That allows for proper wheel fitment every time with now chance of getting them off center. (IMG:style_emoticons/default/smile.gif) |
mskala |
Apr 14 2014, 01:36 PM
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#9
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R Group: Members Posts: 1,925 Joined: 2-January 03 From: Massachusetts Member No.: 79 Region Association: None |
However, you already have the studs there, which will center the wheel. I don't see any mod to the part to make it threaded for using wheel bolts. (IMG:style_emoticons/default/confused24.gif) You lost me there ... Wheel bolts???? The point is that with even with 5 studs, you're relying on those to center your wheels when tightened and there is a chance that you'll torque down your wheels slightly off center and create a wheel imbalance. The inner 3 piece ring on the new hub shown in this thread makes sure that the wheel is completely centered. Hub centric they call them for that reason. That allows for proper wheel fitment every time with now chance of getting them off center. (IMG:style_emoticons/default/smile.gif) The lug nuts are spherical and will center to the studs. So what you're saying is that Porsche is incapable of producing a hub with properly aligned studs, but it is totally capable of producing a perfectly aligned ring for centering. |
r_towle |
Apr 14 2014, 02:30 PM
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#10
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Custom Member Group: Members Posts: 24,574 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
However, you already have the studs there, which will center the wheel. I don't see any mod to the part to make it threaded for using wheel bolts. (IMG:style_emoticons/default/confused24.gif) You lost me there ... Wheel bolts???? The point is that with even with 5 studs, you're relying on those to center your wheels when tightened and there is a chance that you'll torque down your wheels slightly off center and create a wheel imbalance. The inner 3 piece ring on the new hub shown in this thread makes sure that the wheel is completely centered. Hub centric they call them for that reason. That allows for proper wheel fitment every time with now chance of getting them off center. (IMG:style_emoticons/default/smile.gif) The lug nuts are spherical and will center to the studs. So what you're saying is that Porsche is incapable of producing a hub with properly aligned studs, but it is totally capable of producing a perfectly aligned ring for centering. It is quite possible to torque down a wheel offcenter. Aluminum wheels, steel (bolts or nuts) can grab the wheel in such a way that you can honestly mount them off center, and they bounce like crazy. I learned all about this with my BMW....with stock wheels.... I jumped up to 7 series which had a center hole 2mm larger....wheel bounced all over the place. I had to get special adapters, little plastic sleeves that fit over the hub....fixed it. I mounted those wheels probably 20 times trying to figure this out. Had them balanced at least 5 times, at three different shops. Ended up being a 4 dollar little sleeve, all was well. rich |
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