m52/m50 hybrid??

[bulletproofbob]

hey guys, this may be a done question but i need to know... i am running an M50 in my E36 track car that i was going to turbo. but.... my mate has just put a new m52 2.8 in his coupe, his old single vanos motor's water pump let go and the garage told him the motor was shot! so the question, can i use any m52 bits to increase my m50's capacity? could the m52 be a cheapish re build? will my spare m50 head go on m52??

car is off track now awaiting the cage i'm building, and the low pressure turbo conversion... it'd be better as a 2.8 turbo!!!

[Jhonno]

Did his car actually overheat? You can use all the internals in your iron block to make an M50B28

[bulletproofbob]

it did get hot and the "expert" said the top end was screwed... so the crank rods pistons etc into my re-bored block is the M50B28 then?? i'll compresion test her and see what the score is with the bottom end when it is out of the car...

[wullie325i]

i am doing this at the moment m50 block and head with m52b28 internals.

[DanThe]

Crank, rods and pistons in your engine.
No need for re-bore, just de-glaze/hone them making sure there is no lip at the top or bottom of the M50's stroke

[Jhonno]

it did get hot and the "expert" said the top end was screwed... so the crank rods pistons etc into my re-bored block is the M50B28 then?? i'll compresion test her and see what the score is with the bottom end when it is out of the car...

the top end wouldn't get 'screwed' by getting hot..

Anyway as said, you can use the guts for yours

[bulletproofbob]

cool, i'll see what the motor is like prior to pulling the head off... then i will keep you guys posted, much appreciated fellas!!!

[DanThe]

If the alloy engine has overheated you will find pulled threads in the block, I stripped one yesterday that had snapped head bolts. If your lucky the head wont have cracked and you will get away with skimming it

[bulletproofbob]

so the m50 2.5 was just stroked to get 2.8?!?

[Rorty-corty]

Bugger, I'm going to have to try harder bob!

[MarkT]

Whats the advantage of using the M52 internals?

[jaistanley]

an extra 300cc's...

[MarkT]

What combination is involved there? Sounds like a good way to get 3100cc!

[jaistanley]

No, from 2.5 to 2.8...

[MarkT]

i am doing this at the moment m50 block and head with m52b28 internals.

I ment this conversion, not the M20/M50 hybrid

[Jhonno]

i am doing this at the moment m50 block and head with m52b28 internals.

I ment this conversion, not the M20/M50 hybrid

That is what everyone else is talking about also.. No one has mentioned M20's other than you..

[MarkT]

No mate, I just asked what was the advantage of using the m52 internals, as in the topic of the thread. I hadn't mentioned m20's untill you answered my first post?

[martinpallot]

No mate, I just asked what was the advantage of using the m52 internals, as in the topic of the thread. I hadn't mentioned m20's untill you answered my first post?

M20's were brought into this entirely by you. This is not a good way to go 3.1, its a good way to take an m50 to 2.8. There is also no such thing as an m20/M50 hybrid as there would be no advantage

[bulletproofbob]

well i collected the motor today, and it is an ally blocked M52 so i am happy!! i am now wondering if the motor even has any issue greater than the head gasket.... i'll keep you posted!

[Jhonno]

No mate, I just asked what was the advantage of using the m52 internals, as in the topic of the thread. I hadn't mentioned m20's untill you answered my first post?

No, you have definitely been the one to bring M20's into this

We are talking about using M52 internals in an M50 block to make effectively an M50B28

[MarkT]

We've totally got out wires crossed mate. jaistanley made the original M20 comment if you go back and read the threat.

Whats the advantage of using the M52 internals?

Was my first post, I only mentioned m20's after jaistanley's reply to that post.

I think that I am confused over BMW's engine naming. Did they not make an M50B28 and only an M52B28? Hence the combination of the two would make an Iron blocked 2.8??

I'm really not trying to make an arguement here and apologise for my ignorance!

[DanThe]

i am doing this at the moment m50 block and head with m52b28 internals.

I ment this conversion, not the M20/M50 hybrid

So you didnt type this?

[MarkT]

I give up, i'm getting in a mucking fuddle with this one.

I wanted to know the advantages of the m50/52 conversion, not the m20/52 conversion. As in my previous post I didn't realise that BMW didn't make an M50B28.

I'm really not making myself clear

Sorry guys

[Rorty-corty]

The M50 came in two sizes, 2.0ltr and 2.5ltr giving the engine codes M50 B20 and M50 B25 respectively.

The M52 also came in two sizes, 2.3ltr and 2.8ltr giving the designations M52 B23 and M52 B28 (I think).

The internals from the 2.8ltr M52 can be trsnaferred to the 2.5ltr M50 block to give it a bigger capacity of 2.8ltr. This is because the extra capacity is achieved by increasing the stroke (hence carnkshaft swap) as oposed to enlarging the bores.

That's how I read it anyway.

[Jhonno]

Jai never mentioned the M20, he mentioned taking an M50 from 2.5 to 2.8, you've got yourself confused there

[MarkT]

Thank you very much for the info. All clear now

[bulletproofbob]

oh my god... i thought they did a m50b28.... anyway, i'm doing the m50b28 now, and the alloy block will be for sale, if head is still ok (pretty sure it will be) it too is going on the bay!!!

[MarkT]

Jai never mentioned the M20, he mentioned taking an M50 from 2.5 to 2.8, you've got yourself confused there

Oh yes truely confused mate!

[DanThe]

That alloy block is only good for the scrap pile if its overheated

[320ise]

would the m50 b28 have the same power as an m52 b28? also would the crank and other internals go strait in to an m50 with no issues or would some parts need machining?

[Gunni]

a M50B28 with M50 cams and M50 manifold will have more power.

[bulletproofbob]

it got driven to garage so it was NOT really over heating...

[dazleeds]

a M50B28 with M50 cams and M50 manifold will have more power.

elaborate

[Gunni]

How can it be simpler.

M52B28 made 193hp with a bad manifold and I assume worse cams.
So plug in a better manifold and higher end cams and you got power.

[Jhonno]

M50 cams are mildly better than B28