m52/m50 hybrid??

Sat Oct 17, 2009 8:30 pm

Jhonno wrote:M50 cams are mildly better than B28

Are we talking M50 non-vanos cams here or across the board?

Sat Oct 17, 2009 8:33 pm

IIRC NV cams had 1mm more lift.

Sat Oct 17, 2009 8:56 pm

oh it gets better and better!!!

Sat Oct 17, 2009 9:24 pm

I could possibly have a NV head for sale shortly..........

Sat Oct 17, 2009 9:28 pm

Ben is right, but the M50 NV ECU wont cope with the extra cc very well and will need chipping to give the best results

Sat Oct 17, 2009 9:34 pm

i've not looked into the chip aspect yet as my car is meant for the £999 event next year again.... what price are we talking??

the M52 has come with some nice lookin tubular exhaust manifolds, will these be better than the M50's cast items?!?

Sat Oct 17, 2009 10:17 pm

bulletproofbob wrote:i've not looked into the chip aspect yet as my car is meant for the £999 event next year again.... what price are we talking??

the M52 has come with some nice lookin tubular exhaust manifolds, will these be better than the M50's cast items?!?

Chips aren't expensive

Just 328i manifolds are much better

Sat Oct 17, 2009 10:17 pm

E30BeemerLad wrote:
Jhonno wrote:M50 cams are mildly better than B28
Are we talking M50 non-vanos cams here or across the board?

Both.. Non vanos ones are the peakiest, but even the 2.5 vanos ones are better

Sat Oct 17, 2009 11:07 pm

The M52 2.3 was actually a B25 with the intake used by the B28 detuning it. At least thats what I understand the 323i/523i to be. I'm sure there were other differences but as I am aware the intake manifold was one of the major ones.

Sat Oct 17, 2009 11:18 pm

Hmm, I am thinking of doing this to mine aswell now. Then again, I suppose the longer stroke will make the engine slightly less inclined to rev and as the car is supposed to be a track day screamer (in a 5 series?!) I might just leave it as the shorter stroke 2.5.

Sat Oct 17, 2009 11:49 pm

eta wrote:The M52 2.3 was actually a B25 with the intake used by the B28 detuning it. At least thats what I understand the 323i/523i to be. I'm sure there were other differences but as I am aware the intake manifold was one of the major ones.

I'm sure that the 328 and 323 use the 2.0ltr manifold. If you see them side by side you can see the difference

Sun Oct 18, 2009 12:28 am

I'm sure I was looking at a 2.0 M50 today in a breaker and the inlet manifold looked very similar to the 2.5, certainly larger than the crap I took off my 2.8

Sun Oct 18, 2009 12:51 am

They are similar to the 2.5, but different

ie smaller

Sun Oct 18, 2009 12:53 am

Is there any market for the 2.8 manifold & tb I took off the M52 Dan, or should I just chuck it in the skip?

Sun Oct 18, 2009 12:58 am

If you are very, very, very lucky you might just be able to palm it off on eBay advertised as a 'Sport' intake manifold, otherwise, skip

Sun Oct 18, 2009 9:26 am

Jhonno wrote:
bulletproofbob wrote:i've not looked into the chip aspect yet as my car is meant for the £999 event next year again.... what price are we talking??

the M52 has come with some nice lookin tubular exhaust manifolds, will these be better than the M50's cast items?!?
Chips aren't expensive

Just 328i manifolds are much better

so what chip for the M50B28 then, and from where???

Thu Oct 22, 2009 7:41 pm

can you use m50b25non vanos piston rings on a m52b28 piston? take it you are replacing yours?

Thu Oct 22, 2009 8:29 pm

sharp3r wrote:can you use m50b25non vanos piston rings on a m52b28 piston? take it you are replacing yours?

i'll only replace if they are badly worn...

Sat Dec 18, 2010 10:16 pm

Sorry to dig this old thread up, but I've bought a cheap 323 lump. I understand it has 2500ish cc. I understand the Alloy blocked M52s were detuned units.
If I were to fit an M52 Vanos inlet (inc injectors), throttle body and ECU would I see decent power, or should I get M50b25 cams too?

Thanks chaps.

Sat Dec 18, 2010 10:38 pm

They are detuned with the inlet manfold, put an M50 inlet on to open it up.

Here's a thread that will help you

http://www.e30zone.net/modules.php?name ... highlight=

Sat Dec 18, 2010 10:50 pm

Just the M50 inlet, use the injectors that are on your engine (greens)

Sat Dec 18, 2010 10:56 pm

Thanks chaps. Woohoo!

Mon Jan 10, 2011 1:47 pm

seeing as it got a bump.... i'm still building the lump but its now going into an e30 instead of the e36 i have!! dropped on a track day e30 needing minor tlc off the mighty zone for sale section, and it was only about 5 miles away!!!!!!!

how much better than the m20 is an m50/52 though? i know its a common swap but is it a truely worthy swap?? this a track/ring trip car!!!!!

Thu Jan 13, 2011 11:49 pm

Would the alpina B2.5 M50 block, cams, etc. I have work with the m52 2.8 crank, pistons and rods, or would it needing tuning further?

Sat Jan 22, 2011 12:35 am

bulletproofbob wrote: how much better than the m20 is an m50/52 though? i know its a common swap but is it a truely worthy swap?? this a track/ring trip car!!!!!

I've had the M20B25 in a techII and now have the M50B28 (in one of my chromies), which I assume you are still intending to build...

You will notice a bit of a difference, I'll say that much