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Turbo stroker M111

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Discussion starter · #21 ·
It fits! So the OM601 crank definitely fits within the M111 block, next to check is the rod to block clearance given the more extreme rod angle from the longer stroke.

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Will This Diesel Crankshaft Fit? Mercedes M111 Turbo stroker build! #shorts

Mercedes 2.3 Kompressor M111 turbo stroker engine gets a diesel crankshaft, om601 crank appears to fit faultlessly next to check rod to block clearance.Thank...
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Discussion starter · #22 ·
On this engine one thing I may not have mentioned is the valve cover I want to use, to keep things cleaner I will be using a valve cover from a N/a engine in this case a W202 C180 valve cover..

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Discussion starter · #23 ·
Here I explain the differences between the Om601 crank and M111 crank and what it will do for the engine, I would love to get the crank lightened and knife edged but unfortunately due to the budget that's not on the cards for this build.

 
Discussion starter · #24 ·
Not so much a big part of the build, but this shows a choice of valve covers the differences in depth and the reasons we use the N/a valve covers, I'm trying to do informative stuff along side the fun stuff with this build.


I'm learning as I go that means certain processes what parts will and won't fit and in this case the rods are just too narrow on the big end to make work, however there is hope in the form of M102 rods and possibly m104 pistons, but if I have to switch to a 2.0 block to have a greater choice of pistons I will consider that too. The issue with the M111 is the lack of meat left on the bone the 2.3 really doesn't have a lot left to go at with regards to overbore so piston choice is limited. But I'm still doing homework so we shall see .
 
Discussion starter · #26 ·
Avel Du said:
Alex, look at left overs as a starter pack for the next project.
Or open a parts shop with staff discount ;)
Click to expand...
Left overs 🤣 mate I'm practically a breakers yard, price of M111s has gone through the roof though having a lot of difficulty getting them.

Just means the M104 project will end up being ran along side this one 🤣 I like turbos 😆

Also I've linked the forum in the video descriptions hopefully that will bring some more members 👍
 
Discussion starter · #27 ·
Here's a curve ball for everyone, these later M111s 97 onwards have some interesting secrets....

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So they actually use M104 2.8 connecting rods so the m111 and m104 both share the (rounded up) 149mm center to center rod length.

A M102 uses the same style of rod but is 144/5mm

My BMW rods that are too slim are 145mm

So although the engine would not be forged in anyway unfortunately the M102/103 rods would fix my problem and would still hold 400hp reliably but I need to acquire a set first to check small end measurements, however I'm confident this is the solution.

In other news I found the M104 2.8 and 3.2 are the same engines with a different stroke (hence the 2.8 using longer rods) the 3.2 uses the shorter m102/103 rods, this was not good for me to find out I now have a om606 crankshaft on the way (also ironically stamped with 104) and am in negotiations for a set of four m102 rods and 6 m103 rods. I'm like a mad scientist in a scrap yard I love this Mercedes mechano sets 😆
 
Discussion starter · #28 ·
A bit more tinkering time today, moved up the rotating assembly to see where the pistons would sit with shorter rods compared to stock rods with the Om601 Crank.

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I'm next going to reinstall the stock crank for measurements again, so basically the stock rod puts the piston over deck height by about 1mm and the M102 rod puts the piston at 4mm below deck height, if I remember right the stock m111 2.3k is somewhere between 3-4mm but I will clarify this.

So at this point I'm going to retract the "forged" statement from this build because actually this junk yard mechano set Mercedes has provided me with is more than capable of the power levels that I would like to make, that said I may get some Arp rod bolts just to make sure.

I will be doing a full video on the differences between the M104, M103,M102 and M111 rods shortly to try and explain the differences so if any of you guys want to try your luck with a budget stroker build you know exactly what you need to do to achieve it.

I will also soon have another project underway all being well.
Wheel Tire Automotive tire Motor vehicle Tread
Thats not a 4cylinder crank 😉
 
Discussion starter · #30 ·
Avel Du said:
Take cover!

Has Alex gone to the Teutonic dark side?
Will Stroker twin have the
Alex-M3-Eleven badge?
Click to expand...
Honestly mate I've gone mad, I think the petrol fumes have got to me 🤣

I've been doing too much homework and really got to a point of realising just how rediculously interchangable parts are between all these 80-90s mercedes engines are. That crank is a Om606 crank stamped 104, the rods are M103 rods Stamped 102 my 2.8 M104 is the same as the 3.2 bar crank and rods M102/103 rods are apparently a different metallic compound to m111 m104 rods, the change in compound I'm told was 91/92 which is backed up by the M103 being able to make nigh on 800hp on stock components. The M103 uses the M102 rods that are 145mm instead of the 149mm rods used on the m111/104 so perfect for my strokers also the shorter length also makes them more stable at higher RPMs and somewhat stronger against torsional forces.

So I will have a M111 2.4 and a M104 3.2 that started a 2.8 again should be stable for 6-700 with a girdle (probably spelled that wrong)

That was a whole lot of useless information for you Myk I've completely lost my mind ( mad scientist laugh)

Next up reach Allen millyards level of sheer engineering insanity.... Cl65 twin turbo V12 motorcycle? 🤣
 
Discussion starter · #32 ·
So here's an explanation of what the differences are between the rods between the M102,M111,M103 and M104 engines.


I know the standard piston to deck height is 1mm with the om601 crank and M102 rods the piston sits 4mm below deck height so that's a 3mm difference, however I think by using M111.970 pistons I may be able to reduce that, I should be able to make the engine work with a 2mm height but give it some boost.
 
#33 ·
Nice project :)

What CR you are planning to set?

I'm thinking about similar setup but would rather go with 2 liter block, because of cylinder thickness only... do you know are the blocks 2.0 and 2.3 same height? And by any chance have you had a chance to measure compression height of 2.0 and 2.3 pistons?
102/103 rod is good cheap alternative and CR is possible to adjust with skimming block deck for a bit... Or keeping M111 rod together with thicker custom MLS gasket.
Did you check is it possible to rotate 601 crank without touching anything together with rods and sump splash panel?
 
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alfasportivo
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