DanS911

I am refereshing my 3.0 motor and am having some issues finding bearings that don't have to come from Germany. Unfortunately not standard except for #8.
the rods are .5 over 930 103 148 60
the mains are .25 over 930 101 901 51
the sleeve is 964 101 138 01

Any help greatly appreciated!

Steve Weiner-Rennsport Systems

If you find a good used, standard crank, bearings will not be an issue (and they will be far cheaper).

Ed Hughes

Well, I'm surfing on my phone, reading your post and thinking that Steve would be the guy to go to on this, and there is his response. Nice Targa.

rusnak

my friend Tony once told me to keep standard bearings by having the machine shop mill a bit off the rod cap end, then bore the large end out to standard bearing size. He was basically saying (I think), to avoid an alphabet soup of oversize and standard bearings, and put that off as long as possible.

Auto_Werks 3.6

Rusnak,
Your friend was talking about a repair to make sure the dimensions of the rod's big end stayed correct. Generally no oversize bearings are made to support a rod which has been bored out (trued), so the rods are first cut down then machined out to the factory size. For what it's worth the bearings above would be "oversize" or custom, generally when people are looking for bearings to suit a machined crank, they are looking for "undersized" bearings. This is, I assume, what Dan is actually looking for.

Cutting and re-macining the rod's will not help Dan, as his crank has already been cut down. There is no way to smash a standard bearing down to use it with an undersized crank.

DanS911

Thanks guys, yes Ryan the crank has been machined and yes Steve you arent the only one to suggest "get a new crank and be done with this maddness" and since this its a track motor the next time I am in there I am going to be doing it again.
On vacation for a couple more days then time to pull the trigger one way or the other

rusnak

I see now!

Ed Hughes

Yep, that is part of resizing the rods. Making sure the big end is round, and that center-center on the big end and the bushing is correct. Throw in some new bushings and the rods are like new.

race911

I'll join the chorus in not recommending an undersized crank. Now thinking about the 4 or 5 SC cranks I had sitting around and was absolutely sure I'd never use them again, so I traded them away a couple of years ago.

DanS911

Yep......after an exhausting search, where I got to talk to a bunch of guys who really know their stuff and learned alot, I have followed Steve's and a few other's advice.
I found a beautiful standard/standard crank tested and measured by Tom Butler in Conn.
Didn't plan on replacing my crankshaft on this rebuild!! However those freakin' non standard bearings would have cost more this time and forevermore

Thanks everyone esp, Nick, Tom, Mike Bruns et al.