mark kibort

you have to buy one of those $300 wrenches to tighten it, along with a big socket!

Lopez

you could always go old school. My last car with splined hubs came with one of these:

blau928

MK,

I will post pics this weekend. Some Cup Car wheels work, not all.. I made a set of 10" X 18 for the front, and 11.5" X 18 for the back. I had to get different inner barrels, but no biggie, they will be here Mon/Tuesday..

I had the stuff mounted this past weekend but forgot to take pics before I disassembled it all. Anyway, I need to get with the engineer and do some work on the front so I needed the pieces on hand to do that.

You will need to use the big TQ wrench from Porsche, or Snap on. You can also use an Impact wrench like is done at the track if you have a compressor, or a HD HIgh TQ electric (425+ lb/ft) to secure the wheel nut.

It will be extremely simple to do, just like the Porsche system...

Thanks,

blau928

Stuart,

You will definitely be able to use 380mm discs in front. They use them on a cup car with the E28 Magnesium wheels with centerlocks, and the calipers clear no problem. (I will try to find a pic and post later as well...... I have always loved the look of the BBS E28 Magnesium wheels..)

One set of wheels I bought are in process of being drilled as I want to mount them on the car next week, and the other set is not, and I am saving them for exclusive centerlock use. The drilled set can also be used with the centerlock setup later anyway..

Best,

Ispeed

Carbon brakes from a GT3/2 also? Would be pretty cool, but way out of my league.

blau928

Doc,

While I respect your right to post your opinion, I have to also say that if the system is properly engineered for the loads it endures, that it will be fine. The key is in the engineering.

I don't know which vehicle you had, and with which centerlocking system, so I can't comment on your system you had on a prior car.

However, if you are so against it, then you should not drive your 928 at all. The entire rear upright and hub assembley is only secured to the axle shaft by a single nut with 400+ lb/ft of TQ. If the axle nut gets loosse, the axle could destroy the upright, hub, bearings, and a few other things in the rear suspension. However, more importantly, The front hub is also secured in this manner, and if the axle nut breaks loose, then the entire hub will come off of the car regardless of how the wheel is secured to the hub assembley and cause a catastrophic failure.

Further, you have not seen the way the parts I have assembled work, and IMHO, are speaking entirely out of turn on the basis of failure/weakness/dirt/spline interface problems etc... How can you possibly comment on the setup if I have not posted pictures of the detail parts..? (Entirely illogical, and unfounded, just your opinion based on hearsay, and your imagination of what the parts look like.)

Of course I still respect your right to have an opinion, I just disagree with the foundation of it, and your comment..

mark kibort

That's Great. excited to see how they look. that woud be really cool! maybe if it works, I can convert mine and just buy all new centers. NOT! I just got all the new parts for my wheels that got wrecked but havent put them together yet. (my A set). I got sligthly different outers for the fronts so I can elimnate the spacer I was using with the 275s, but not the 305s on the 10s. I also had to get a new barrel for the side that went into the wall . what slilicon are you using for the wheels? just plain old silicon from Kragens?

have fun!

JHowell37

Instead of being so hostile and defensive maybe you could tell us what the advantage is of having a center lock wheel. Right now, all I can think of is something my father sometimes says: "more money then good sense."

mark kibort

what are you going to do about a spare???

blau928

MK,

Maybe we are getting wires crossed, as I don't understand your comment on silicon.. I am using BBS E28's, which are sealed with an O-Ring on a disc if you meant the silicone in the wheel barrels to seal them.

The silicon I was referring to is a silicon-vanadium alloy derivative of 4340 called 300M which I want to use to make the parts for the front centerlock parts.

Sorr to hear about your wheels getting thrashed. Ouch....!

About a spare, you will be able to use the existing Porsche spare, as the drive pins will have a Porsche spacing of 5X130. This is what I like about the design of the setup, it can be run as a centerlock, or with 5 bolt wheels.

Ok, I am giving too much away... You guys will just have to wait and see how it turns out for the fronts. The rears are a done deal, and I will post pics on the weekend..

Thanks,

blau928

JHowell37,

There is no hostility or defensiveness at all in any of my replies. None offered, and none intended.

The advantages I see, were clearly stated in my response to Jim M in post #7. I am sure you can reread it.

Further, my comment on the critique of the parts is based on opinion, and not on actual parts designed by myself. Therefore, as I said before, I have not posted pictures here for anyone to see as yet, so all is based on speculation as of current.

To your dad's comment, and yours if you chose to adopt it... I am not asking you to buy the parts I plan to make. However, if others want it, then they are capable of deciding for themselves if in your opinion there is no perceived value in centerlock parts...

I respect all the criticism, and welcome more in its entirety.

However, it is much more appropriate if the criticism is based on fact and merit. Opinions are fine as well if based on substantiated fact. Hearsay is just that, hearsay...

Thanks again,

blau928

So,

I took pixx of the rear setup as promised, and the front test fitting to show what they will look like. The rear is a done deal, like I mentioned. I am working on the fronts, and will be updating it as I get closer. I think I have it figured out, and have some preliminary parts already in CAD for the fronts.

Let me know if you have questions etc.

Again, these are BBS E28 Magnesium Centerlock wheels on a 928. A first as far as I know.. I used an 8.5" X 18" dia rim for the shots without tires mounted. I have 18 X 10" Front, and 18 X 11.5" Rear that I will mount on the car shortly. I will mount a 5 bolt set first, and then I will mount a centerlock set when the parts for the front are ready, as I have two sets of these wheels...

The rear pictures (first 5 pixx reading left to right) have the locknut attached, and the fronts do not as yet. The three small screws are missing from the pressure disc (small three holes in the center cap area), as I chose not to install them as well as the safety pin in the axle (goes in the tip of the center of the threaded spindle) as this was just for pictures to show what the setup looks like mounted.

No hammer to take off, or put on.. You will need a big torque wrench, or an impact wrench capable of 400+ lb/ft......... The fronts will be the same as long as I can get it done as I envisioned. So far, looking good...

Again, it's not for everyone, However, if you are potentially interested in having a set, let me know on the thread, or via a PM. (I am working on pricing, and will get that out as soon as I can. However, it may be a few weeks for pricing, as I still need to have an engineering review of the front setup, and material and milling cost from the machinist...)

Sorry, safety first......

Enjoy...

Thanks,

Benton

Awesome. I can't wait to see the final product.

ew928

Do centerlock wheels use a locking pin to secure the single nut from backing out?

(Just curious as I've had mechanic not torque down lug bolts on my ex-Audi and had all 5 bolts loosen. It was a front wheel. Glad I detected the looseness in the steering wheel and torqued the 5 now finger tight lugs back down.)

pcar928fan

I have to say I am w/ Doc on this one... Like the Saturday Night Live skit about "Bad Idea Jeans" from the early/mid '80's! Mostly just from the PITA standpoint and the absolute impossibility of the next owner of the car (should it ever be sold) to find the parts to repair if/when something breaks... YMMV!