BBC main bearings .060" undersize

[apm]

Hi everyone, just after a little help , I need a set of .060" undersize main bearings for a BBC , supplier here in Australia said he had King's in stock so we ground the crank and wouldn't you know it come time to order them he cant find them anywhere, would anyone know where I can find a set asap
Thanks in advance

[Geoff2]

And there in lies a lesson....

Try Barry Flysher in Melbourne [03] 9481 4543

[apm]

Thanks I'll give him a shot, I'm willing to UPS a set in from the U.S if I cant find them here in Australia

[Newold1]

I hope you might be re-nitride treating those journals, they are going to be a bit soft after .060" is gone.

[af2]

Hopefully the crank never sees the bearing...

[apm]

yes its already been nitrided again, thanks

[Alaskaracer]

Not sure I'd even consider running a crank at .060" under. That's a lot of grinding and meat gone...

[dustinm]

Not sure I'd even consider running a crank at .060" under. That's a lot of grinding and meat gone...

lol

[Schurkey]

Not sure I'd even consider running a crank at .060" under. That's a lot of grinding and meat gone...

Good God, they used to cut 0.200 out of 400 sbc mains to fit 'em to 350 main saddles in the early years of "383" sbc.

[engineguyBill]

Many racers have BBC cranks with the rod journals offset-ground to Honda rod sizes with some success. If the rod journal is ground to increase the stroke, then the crank pin overlap is significantly reduced but these cranks do hold up well in drag race applications.

[apm]

It's not going to make much more than 400-450 hp im not concerned with the strength at all , surely someone out there must know where I can find a set of these bearings !

[KnightEngines]

I made a couple of calls for you - no luck.

Ebay may be an option?

[Scotty]

Try auto surplus in victoria or bob fischer its worth a punt ??

[apm]

Thanks Tony appreciate it, I have tried Auto Surplus and Bob and everyone else in Australia I think haha, was hoping someone in the U.S might be abe to find them , I will check ebay though
thanks again everyone

[69top502]

apm, this is a reply from someone on another forum who saw your post but couldn’t log on here for some reason. I copied this response to you. Hope it helps!



“I can't get logged back into SpeedTalk. But want to help someone there. Perhaps someone could forward this info?

Please note I don't wish to debate the Australian gent's issue/approach; only to provide him a part number for what seems an odd size that he's seeking.

Speedtalk user "apm" has had his BBC crank's MAINS turned 0.060" undersize but cannot find matching 0.060" undersize MAIN bearings
Seems there's good reason as it seems neither Mahle-Clevite or FM offer BBC MAINS in 0.060" undersize.

However, seems KING does offer 0.060" undersize BBC MAIN Bearings but in Only one version/style... Silicon (Aluminum?)
Anyway, it's KING pn MB 556SI060 … and No, summit doesn't offer that size.
I do see a set on Amazon for right at $75 USD

Perhaps someone here can get into their Speedtalk account and find this thread
https://www.speed-talk.com/forum/viewtopic.php?f=1&t=55721

and pass on to user "apm" KING pn MB 556SI060”

thanks