WBX 2.1 crank in T1 case options?

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sideshow
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Re: WBX 2.1 crank in T1 case options?

Post by sideshow » Wed Apr 11, 2018 9:15 pm

So searching for BMW M30 mains, I find that it isn’t common to fix them domestically.
Oddly for cheap aluminum bearings I get a hit from Israel made “King” main bearings that seem to offer the dimensions needed. I also see Glycols offered that I suspect are more tradition steel backed design.

Code: Select all

Quantity
1
6
Crankshaft Diameter
59.990 / 59.969mm
59.990 / 59.969mm
Housing Diameter
65.001 / 65.019mm
65.001 / 65.019mm
Max Wall Thickness
2.487mm
2.487mm
Max Length
30.020mm
24.000mm
FL O/S
29.92/29.87mm STD

Neither would drop in especially the thrust, but the non-thrust (6 sets!) show some promise of fitting the air cooled case bore and water cooled crankshaft.
Yeah some may call it overkill, but you can't have too much overkill.

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sideshow
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Re: WBX 2.1 crank in T1 case options?

Post by sideshow » Mon Apr 30, 2018 10:08 pm

I realize that this maybe clip art or a brand (or reboxer) I have never heard of but I think this is it;
https://www.rockauto.com/en/moreinfo.php?pk=4806156
Image
Not sure what to make of the oiling groove, is it normal for cranks held by caps to only oil from the block side?
Yeah some may call it overkill, but you can't have too much overkill.

66brm
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Re: WBX 2.1 crank in T1 case options?

Post by 66brm » Tue May 01, 2018 4:36 pm

Yeah

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Re: WBX 2.1 crank in T1 case options?

Post by Piledriver » Thu May 03, 2018 12:10 pm

...They want the higher loaded side fully supported by oil film/max surface area.
I, for one, regularly embrace our new robot overlords, as I am the guy fixing the robots...

Zedbed99
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Re: WBX 2.1 crank in T1 case options?

Post by Zedbed99 » Sat Sep 22, 2018 1:48 pm

Hi, I came across this thread by accident.

I had a Laurie Pettit wasser crank/t1 case conversion.
It was very mild so after a while I rebuilt it. It had the later thrust bearings and notches to stop them spinning. I don't remember exactly which were which but to replace the mains I needed one set of type-1 bearings, 1 set of type-4 bearings and the wasser thrust plates. There was also 1 extra thick shim as described above. No BMW bearings. Hope this helps someone.

It's a great conversion, eliminating thrust case wear and providing the best VW flat four crank and a type-4 flywheel. Mine revved smoothly off my 7,000rpm clock without being dynamically balanced.

Annoyingly, this is the only photo I have of the crank in the case.
Image
Ignore the crazy case clearancing, Laurie wasn't at his best and retired shortly after.

Zedbed99
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Re: WBX 2.1 crank in T1 case options?

Post by Zedbed99 » Sat Sep 22, 2018 2:06 pm

Found another, even worse!
Image

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