4 lug billet hub adapters?, vented rotors |
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4 lug billet hub adapters?, vented rotors |
zach914v8 |
Nov 16 2014, 12:29 AM
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#1
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Member Group: Members Posts: 216 Joined: 26-November 10 From: Houston Member No.: 12,426 Region Association: Southwest Region |
Some years ago I read that brad Roberts was building these hubs that would allow us 4 lug guys the chance to use vented rotors. Apparently for some reason they can't be found anywhere. I have invested $$$ in aftermarket wheels and want to stay with 4 lugs.
Does anyone here have any information about these hubs? Maybe drawings or something, so I can have a set machined. Thanks Zach |
ConeDodger |
Nov 18 2014, 12:58 PM
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#2
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Apex killer! Group: Members Posts: 23,588 Joined: 31-December 04 From: Tahoe Area Member No.: 3,380 Region Association: Northern California |
Mike,
Eventually, my car will be down at McMark's shop for the installation of the 915 transmission. They are building it right now. Once it is in the car, Mark is going to fabricate the cable shifter system. You are welcome to reverse engineer from my 5 lug AL hubs. As I said, these were just drilled and tapped for studs and they loosen up unless the wheels are holding them in place. That is the only thing I would engineer out of them. I believe mine use 914-6 rotors and I know it uses Alpha Romeo GTV-6 Aluminum calipers... So I have a very significant unsprung weight reduction in the front. |
zach914v8 |
Nov 18 2014, 01:07 PM
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#3
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Member Group: Members Posts: 216 Joined: 26-November 10 From: Houston Member No.: 12,426 Region Association: Southwest Region |
Just thinking out loud here, but the stock hub is just a solid piece of metal right? why couldn't we cut the rotor section off and machine the back of the hub to accept 911 rotors? Is this possible, or am I completely out of wack here?
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Starlack |
Nov 18 2014, 02:44 PM
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#4
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Member Group: Members Posts: 67 Joined: 8-January 12 From: Germany Member No.: 13,978 Region Association: None |
The axle hub from the 914er can not be too short because the brake discs are from beetles and 411/412 is the same. But I'll see it on Thursday .. |
zach914v8 |
Nov 18 2014, 03:09 PM
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#5
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Member Group: Members Posts: 216 Joined: 26-November 10 From: Houston Member No.: 12,426 Region Association: Southwest Region |
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Starlack |
Nov 18 2014, 10:36 PM
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#6
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Member Group: Members Posts: 67 Joined: 8-January 12 From: Germany Member No.: 13,978 Region Association: None |
The axle hub from the 914er can not be too short because the brake discs are from beetles and 411/412 is the same. But I'll see it on Thursday .. I will be looking forward to see how these fit on your car. I have a question for you, what year is your 914? good Morning My car is built in 1970 |
zach914v8 |
Nov 18 2014, 10:57 PM
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#7
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Member Group: Members Posts: 216 Joined: 26-November 10 From: Houston Member No.: 12,426 Region Association: Southwest Region |
The axle hub from the 914er can not be too short because the brake discs are from beetles and 411/412 is the same. But I'll see it on Thursday .. I will be looking forward to see how these fit on your car. I have a question for you, what year is your 914? good Morning My car is built in 1970 I was afraid you were going to say that. From what I can tell the early cars were different. Auto Atlanta sells two different hub assemblies for the 914/4. One for the 70 and 71 and then another for the 73 and up. I'm no guru, so I don't know what the exact difference is. But, it may very well be the case that the kerscher hubs/rotors will fit your car and not mine. |
Starlack |
Nov 19 2014, 01:41 AM
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#8
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Member Group: Members Posts: 67 Joined: 8-January 12 From: Germany Member No.: 13,978 Region Association: None |
I was afraid you were going to say that. From what I can tell the early cars were different. Auto Atlanta sells two different hub assemblies for the 914/4. One for the 70 and 71 and then another for the 73 and up. I'm no guru, so I don't know what the exact difference is. But, it may very well be the case that the kerscher hubs/rotors will fit your car and not mine. Yes there is a difference between the models to 72 and the later models The later models have a centering on the brake disc. the elderly not. unimportant for the installation of the disks Kerscher Here in the German forum, we currently have the discusion whether the conversion works in both models For the older models such as mine must be a distance of 5 mm plate for the brake calipers (Ventet Brake disc) In the later is supposed to be different. I will inform about the conversion .. |
stugray |
Nov 19 2014, 01:21 PM
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#9
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Advanced Member Group: Members Posts: 3,824 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None |
For the older models such as mine must be a distance of 5 mm plate for the brake calipers (Ventet Brake disc) In the later is supposed to be different. I will inform about the conversion .. I just witnessed the difference first hand when I attempted to install "early" rotors on a "late" spindle assembly. Everything seemed fine right up until you go to put the caliper on. The offset of the disk centerline from the inner bearing seating surface is different and the caliper will not slide into position. So it is likely possible to get a hub design that is common for both models, BUT requires a final step of customization. With a common Aluminum hub design the final steps would be to: 1 - Bore down to the correct depths for both the inner & outer bearing race seating surfaces (early vs late spindle) 2 - Drill for 4 vs 5 lugs and press in studs from the back or install inserts |
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