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Spare m50- m50b32?
Posted: Wed Dec 15, 2010 5:22 pm
by Cook318IS
As most of you probably know my non vanos m50b25 was verging on death by timing chain before i put my m52b28 in. I want to strip it down becuase i've always wanted to strip an engine down anyway. The engine has no sump, no inlet, the wiring loom is scrap (bits donated to the m52

) and obviously it has a knackered chain.
So... do i strip it down and then make something awesome like a coffee table out of it. Or do i rebuild it as a 2.5 becuase i'd like to give that ago too - but i dont want to go back to a 2.5. Not much point bunging a 2.8 bottom end on and i'd rather have a vanos iron block if i was to do anything like that anyway. I'd love a turbo but insurance probably won't agree!
Discuss

Re: What to do with my spare m50?
Posted: Wed Dec 15, 2010 5:28 pm
by magpie
sell the head ?
Re: What to do with my spare m50?
Posted: Wed Dec 15, 2010 5:31 pm
by blitz877
didn't dezzy build his 3ltr from a 2.5 m50? that could be a good build for you
Re: What to do with my spare m50?
Posted: Wed Dec 15, 2010 5:33 pm
by Cook318IS
magpie wrote:sell the head ?
Selling bits is always a possiblity. Or more likely is that it would end up getting stashed away becuase i can't be bothered with timewasters.
blitz877 wrote:didn't dezzy build his 3ltr from a 2.5 m50? that could be a good build for you
As i said, i'd rather have a vanos engine if i was to put a bigger bottom end on. But yeah it would be possible.
Posted: Wed Dec 15, 2010 5:46 pm
by BrewCity11
Re:
Posted: Wed Dec 15, 2010 5:50 pm
by blitz877
fast road/race engine?
Re:
Posted: Wed Dec 15, 2010 5:53 pm
by BrewCity11
Re:
Posted: Wed Dec 15, 2010 6:00 pm
by Cook318IS
It would have to be a road engine becuase the e30 is my daily. I'm thinking more and more of doing it into something like furniture becuase i either want a vanos engine or to be a few years older for the insurance to be resonable for what i would like.
Re:
Posted: Wed Dec 15, 2010 6:15 pm
by Dezzy
Strip it
Prep the iron block ready for 30lt bottom end. there is a couple of ways to do this.
Then bolt your vanos head and sump etc off your m52 and you are at my spec give or take some s52 cams and enlarged tb

Re:
Posted: Wed Dec 15, 2010 6:59 pm
by DanThe
Blocks are the same Paul

Re:
Posted: Wed Dec 15, 2010 7:08 pm
by daimlerman
Best of both worlds;
Strip and re-build the head ready for your proposed turbo project.
Strip and paint the block,then use as a coffee table in the short term....

Re:
Posted: Wed Dec 15, 2010 7:56 pm
by Cook318IS
DanThe wrote:Blocks are the same Paul

I feel such a twat now

You used an e46 330i bottom end and an m52 loom + ecu iirc? Because this engine will need a new loom anyway
Oh and dezzy i already have an enlarged tb, but the butterfly valve is fooked so i need to obtain / make a new one.
Re:
Posted: Wed Dec 15, 2010 8:00 pm
by Dezzy
Dan's is a E46 330 crank in a M52 block iirc
Re:
Posted: Wed Dec 15, 2010 8:02 pm
by Cook318IS
Dezzy wrote:Dan's is a E46 330 crank in a M52 block iirc
No m54b30 pistons?
Re:
Posted: Wed Dec 15, 2010 8:06 pm
by Dezzy
No standard 84mm M52 I think? I think the B30 has the same size pistons. A 330 crank in my donk would be nice.

Re:
Posted: Wed Dec 15, 2010 8:24 pm
by Cook318IS
M54b30 pistons look to be 84mm according to an excel document i have. It also says that the torque from a m54b30 is 214lb/ft, mines already got more than that

Re:
Posted: Wed Dec 15, 2010 8:25 pm
by Dezzy
Emissions strangled though as standard mate.
Re:
Posted: Wed Dec 15, 2010 8:32 pm
by Cook318IS
Thats true. It also appears that the m50b25 pistons are 84mm so i presume i could use them with the m54b30 crank?
Re:
Posted: Wed Dec 15, 2010 8:36 pm
by Dezzy
Oh yeh M50 and M52 pistons are the same different rings though. It would be a shame not to fit bigger pistons. M43 pistons are 85mm witch would give you 3.2ish with a 330 crank. Bit of a block skim at the same time and you will have a blockbuster.

Re:
Posted: Wed Dec 15, 2010 8:38 pm
by Andy325i
Cook318IS wrote:Thats true. It also appears that the m50b25 pistons are 84mm so i presume i could use them with the m54b30 crank?
I think the skirts are too high on M50 pistons?
Sure Dan will be along shortly.....
Re:
Posted: Wed Dec 15, 2010 8:39 pm
by Cook318IS
I thought you needed custom crank stuff for 3.2's - isnt that what alpina did? Anyway i think you guys may have made a desision for me
Anyway, got a few weeks off from friday and i need to remove the head of the engine from the block to get it home from the garage and begin the uber long task of buggering something up

Re:
Posted: Wed Dec 15, 2010 8:43 pm
by Dezzy
I have 3.0lt with bigger pistons and 2.8 crank
Dan has 3.0lt from the crank
Put them both together and what would you get?
A cracking engine I reckon. Basically Dan alpina lump.

Re:
Posted: Wed Dec 15, 2010 8:54 pm
by oldroydsr4
What ecu would you run a m54b30 cranked, m43 pistoned m50 on?
Re:
Posted: Wed Dec 15, 2010 9:21 pm
by Dezzy
I am using M52 remapped on my S50B30 pistoned M52. If you could run S52 loom and Ecu that would work? Dan?
Re:
Posted: Wed Dec 15, 2010 9:33 pm
by E30BeemerLad
V12 is where it's at you pussys

Re:
Posted: Wed Dec 15, 2010 9:41 pm
by Cook318IS
E30BeemerLad wrote:V12 is where it's at you pussys

Hurry up then

Re:
Posted: Wed Dec 15, 2010 9:44 pm
by Dezzy
850i/Ci, M70B50 V12, 4,988 cc, 295 hp, 330 lb-ft
Not exactly mind blowing matey

Re:
Posted: Wed Dec 15, 2010 10:02 pm
by E30BeemerLad
The comparisons I've had from those that have driven them is that 3rd gear and floor it is like flooring a 2.7 in 1st.
A 150 shot of gas will liven the lazy turd up anyway.
Anyway, we would have moved on from fossil fuels before I get that one done, if it even gets started

Re:
Posted: Wed Dec 15, 2010 10:07 pm
by daimlerman
[quote="E30BeemerLad]
Anyway, we would have moved on from fossil fuels before I get that one done, if it even gets started

[/quote]
Hmmmmmm,
save gas,fart in a bottle!
Re:
Posted: Wed Dec 15, 2010 10:55 pm
by Cook318IS
Ive just checked out bmwfans.info and it says that the m43 piston is an 84mm piston (
http://bmwfans.info/parts/catalog/E36/S ... t_pistons/ )
but the m44 318is engine is a 85mm piston instead (
http://bmwfans.info/parts/catalog/E36/S ... t_pistons/ ) Any ideas what conrods to use?
Just incase i do happen to fall over some of these bits in the mean time

Re:
Posted: Wed Dec 15, 2010 11:16 pm
by Morat
E30BeemerLad wrote:The comparisons I've had from those that have driven them is that 3rd gear and floor it is like flooring a 2.7 in 1st.
A 150 shot of gas will liven the lazy turd up anyway.
Anyway, we would have moved on from fossil fuels before I get that one done, if it even gets started

Could you build it up with two 2.7 conversions?

Re:
Posted: Thu Dec 16, 2010 7:35 am
by Dezzy
Cook I stand corrected.
Speak to Dan mate he will know better than me. I used standard M52 rods with custom little bushes
Re:
Posted: Thu Dec 16, 2010 4:53 pm
by Cook318IS
My excel document i have agrees with what you said though about the m43 pistons being 85mm. I wanted to check incase the iS engine had decent pistons in it
I'll send him a PM in good time if he doesnt see this first. As i said im in no rush atm, and it'll take me forever to do it anyway

Re:
Posted: Thu Dec 16, 2010 5:28 pm
by Dezzy
Yeh Dan is the man to talk to mate.
M50B32 sounds damn cool to me.
I think Dan has some none vanos schrick's as well which would make it a proper screamer.

Re:
Posted: Thu Dec 16, 2010 5:37 pm
by Cook318IS
Yeah i've seen the shricks on ebay - i fancy having a vanos head though tbh. It would be rude not to cam it while the engine is in bits.