M44 upgrades

[benz-tech]

The M44 head is similar to the mitsu heads it seems. I have noticed it is similar to the 4G63 heads on the EVO. These heads can handle really high RPM which makes me think the M44 is not a bad design. I think the main thing holding it back are the weak cams it comes with. I would love to see how some aggressive cams perform! I also think the BMW rockers seem quite heavy, so this would need to be improved as well for higher RPM use.

Ok, apples and oranges here but, mercedes 4v heads have come in 2 varieties as of late. The garden variety: rockers and usually a 6,200 rpm rev limit- Nearly every post '05 cyl head has this... except for the pinnacle of AMG engineering, the 156 6.2L n/a beast. Cams over buckets and a 7,200 rpm rev limit . Its inefficient as hell, and superceeded by a turbo rocker arm engine but if I could afford the car and the fuel on my commute, I would own a 6.2L AMG powered C63. 

Now for the type of driving we all mostly do? It probably doesnt matter which type our engines have.  6.2's beat the hell out of their flat tappet bucket type lifters. The poor side loading caused by rockers destroys the guides and seats on our other engines.? 6 in one...but I prefer the buckets.

[sh123]

The M44 head is similar to the mitsu heads it seems. I have noticed it is similar to the 4G63 heads on the EVO. These heads can handle really high RPM which makes me think the M44 is not a bad design. I think the main thing holding it back are the weak cams it comes with. I would love to see how some aggressive cams perform! I also think the BMW rockers seem quite heavy, so this would need to be improved as well for higher RPM use.

Honestly I think the M42 head gets used the most because its the easiest to get with more aggressive cams.

One more month my m44 should be in. Ran in and been mapped.

[MoMansi]

update:
just got rid of my M52B28 engine
the guy who bought it couldn't just believe i'm selling it to get a 4 bangers 
he even thought the engine has a problem, but everything got sorted out....

i'm really glad, finally no more 6 cylinders, back to the nimble and lighter 4 bangers....
i will do my best to make an S14B20 replica engine with an M44, i will mostly be doing everything myself...

[MoMansi]

anyone tried swapping intake cams from M42 to M44? cam sprockets as well?

[Darky]

anyone tried swapping intake cams from M42 to M44? cam sprockets as well?

Not easily done m42 on lifters and m44 on rockers, as a consequence m44 lobes are a lot bigger but the bolts for cam timing wheels don't line up, so your timing would be off amongst other problems!

Cheers Rohan

[benz-tech]

Cams? No.
The sprockets, however,  need to follow the DME for the timing tabs or wheel.  I'm startimg to feel like a lot of the questions lately have been asked, and answered on this site already.

[MoMansi]

ok sorry for that (the many questions), will do more reading, i apologise

got the M44 engine with second plate throttle bored to 57mm...

currently in the car painting process, will start on the engine as soon as i finish the paint job...

got me an old E24 OBC that i will try to retrofit, mad project with lots of difficulties but i will study it well, will try to

the engine will mate to an E30 M40 get rag gearbox, i need the 5th gear as overdrive as i do a lot of highway cruises, and a 3:45 differential for now.

Cheers

[MoMansi]

while in the car is in the painting process, i thought i would remove the intake manifold for some cleaning and check ups:

did anyone notice that ports 1 and 4 on the intake runners ports are kinda narrower at the injector base and entry of the head ? had to port match the 4 ports.
also gasket matching the upper and lower manifolds requires removing of significant amount of metal, already in the process, porting and polishing whatever gets in my hands.
another thing the supposedly "short" runner isn't really that short compared to the "longer" one, slight difference, so i thought about doing this, i will enlarge the air box by cutting and welding the short runner to extend the air box to the area between the two runners "the triangular area" and that should really get the short runner near the ITB effect and allow more air on high rpm.

any ideas?

[MoMansi]

sorry i'm trying to post pics

[MoMansi]

done

[MoMansi]

port no.4

[MoMansi]

Port no.1 still in the process

[MoMansi]

 view of the runners

[MoMansi]

working on the runners

[MoMansi]

gasket matching the upper part