I'm a new guy, so I expect nothing less than expert flamers...
I hope to build a stronger lower end for a Cooper, using an MCS crank and rods. Maybe Wiseco pistons, I dunno. Gotta get back up to 10.6 to 1 somehow.
Anyone done this who will talk?

 

I would like to do this. Awaiting to read what others have to say.

 

Just curious, why do you need a "stronger lower end"?

- Mark

 

Reason? Since when was a reason required for a mod?

Kevin

 

Have not done it -- But -- just enjoy working on the MINI!!

Hope you can report back with how it turns out.

Best of Luck!!

 

Give Jan @ RMW a call. I know he has done a r50 race engine not sure what crank he used. I'd look at different piston though.

 

Good question. It's more like "want" rather than need. I have an R50 motor w/ a couple of spun rod bearings. The #1 crank journal is quite trashed. I have an MCS parts motor too, with VGC crank, rods, etc. While the bore, stroke and block deck height are the same, the rods are not.
So, if someone out there has done this already and said "I had good luck w/ JE pistons, lower the pin 2.5mm on MCS spec but ask for a flat top", then I might save some trial and error.
And most importantly, I can brag that MY R50 has forged rods, a forged steel counter-weighted crank, blah, blah.

 

we have done this already, we even have a program to machine in the oil squirters for more reliability for high performance

we also have billet stroker cranks, rods and pistons custom made to your use

 

You can use the MCS crank and rods, only if you use a set of aftermarket pistons. Also, if you use the R53 parts, it would be good to put the trimetalic bearings of the R53. I also want to do this, along with high compression pistons. (was thinking about 11:1 so as not to have any problems with pump fuel) I emailed Wossner a few weeks ago, they said they are not ever made the the Non S Cooper and it'd cost 250 per piston for a custom set, and they want a stock piston for sample.

 

if you want a set of R50 pistons in 11:1 it will cost you $600 with us for custom made CPs. If you are going through the trouble it's better to use the S rods as they are much stronger than the R50 rods

 

Fast and precise as always
Are the rings and everything needed included Jan? Do they have coating on the skirts?
And the last question, will i have to "reshape" (i don't know the correct word fo this) the cylinders? Engine has 86000km (aprox 55000 miles)

 

yes they come with rings and pins

CP doesn't use coatings on their pistons, if they are made properly they aren't needed

Honing is the word you are looking for
It's always best to bore it for proper sealing

 

It looks like the r50 boys want to start playing with thier cars. Jan has some great options for your motor's.

 

When the funds will be available, i am pretty sure i will exceed the 100hp/lt

 

Props to the OP for actually doing something productive....


Though it costs alot lol.

 

If that is a main journal you're speaking of and the bearing has spun too, the block can't be used. The crank journal pin for the rod's big end is 2mm larger on the MCS than the MC.

 

Hey K-Huevo, I'm with ya. I know you know this already but the piston pins are 2mm bigger on MCS too. Not only that, but the MCS rods are shorter by about 4mm, so the guys who say "just use Cooper pistons" obviously have never looked at this stuff in real life.
It was the rod bearing. The mains looked quite good. Machine shop sez block is fine but needs a fresh bore, MCS crank/rods are fine and now pistons are on order from Jan at Revolution. MCS head will get reworked/ mildly ported and a Schrick cam.
If it works out, I'll keep you boys posted and brag like an idiot. If it doesn't for any reason, I'll fade away w/ my tail between my legs.

 

Hope it all works out. Jan has some nice stuff for r50 engines that people don't know about.

 

I suggest larger injectors with a proper tune and as you will discover there are not many injectors that are a direct fit with the MC manifold and connector. Would you share the circumstances with the spun bearings please, and what’s the condition of the upper shells on the good rod ends? Now is the time to address oil return and make a few oil distribution enhancements.

 

K-Huevo-San,

This is the kind of help I hoped for! A man who's been there.
So, which injectors specifically, should an R50 guy should go with? I prefer not to discover this by reinventing the wheel, so to speak. Hence the forum.

Improved oiling sounds good! Can you ruminate? The dude who blew this one up seems to have run um, low on oil - which looked really black too. T'wasn't me.

 

Can you show which point is the crank journal pin which is 2mm larger on the MCS?

 

It is the crankshaft’s connecting rod journal, sometimes called a pin to differentiate it from a main journal.

 

R50: http://www.realoem.com/bmw/showparts...91&hg=11&fg=20
R53: http://www.realoem.com/bmw/showparts...91&hg=11&fg=20

It shows exactly the same diameter, unless it is the width that's different.

 

[FONT=Times New Roman][SIZE=3]The catalogue’s description for the R53 connecting rod bearing shell is incorrect, right part number, wrong spec.[/SIZE][/FONT]

 

Nick,

Are you really in Greece, or is it like.. Greece, GA?
Can I come visit? If it's Greece the island...

This is going to sound pompous but the RealOEM R53 page is incorrect. They re-printed the R50 page. The rod journals, like K-Huevo-San said, are bigger on R53. R50 measures 44mm while R53 measures 46mm. But it gets better. The width of the ground journal is slightly wider on R53. R53 rods look chunky compared to R50 rods, BTW.
The counter balanced R53 crankshaft is also chunkier/heavier but it's the forged steel counter balanced part that got my attention. The piston pins of the two are also quite different, besides the 19mm vs. 21mm diameter. The R50 pins are press-fit while R53 are floating w/circlips.
The main thing that's the same, block-wise, is the deck height. Wiseco's chart shows the deck to be 8.267". But in my garage it was 8.067". I kid you not. You guys can bet on who's right, me or Wiseco.
So ,when you start trying to figure out how to spec out the R50 piston of your dreams, good freakin' luck! It's like these guys either don't know, or won't tell.