Mercedes w123 - 2.2L Turbo

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Mercedes w123 - 2.2L Turbo

Postby yzn » Wed Jun 10, 2015 10:02 am

Hi all,
Just want to share a project that I have been involved with for the past few years. Originally the car started as 2.0 m102 carb engine, later the engine was swapped with later mercedes m111 EFI and after having some problem with the famous mercedes engine wiring harness and ecu I decided to converted to megasquirt. At first a m45 supercharger was fitted with 0.4 bar of boost after that it was converted to turbo with the following specs
-Vehicle : Mercedes w123 -200 1982
-Engine: Stock Mercedes 2.2L m111.960 4-cylinder engine from w124, 10:1 compression. 0.8 bar of boost

-Megasquirt 2 v3.0, custom wiring harness, 785cc/min delphi injectors, VAG COP wasted spark, gm CLT & IAT sensor, Ford TPS, machined 36-1 trigger wheel on the crankpulley, VVT control, bosch PWM idle valve, k&n filter, MAC boost control, launch control, switchable map.
Walbro 255 and bosch fuel pumps, 2 liter fuel surge tank, sytec FPR.

-Forced induction:
(2014- ???): Holset hx30 turbo, log style exhaust manifold, 40mm wastegate with 7psi spring, 3.5 inch downpipe to 3 inch exhaust pipe with two custom mufflers, small fmic. 0.5-0.8 boost.
(2012-2013): Eaton m45 supercharger from later m111 kompressor engine. 0.4 bar boost.

-Driveline and suspension:
Mercedes 4 speed 722.4 automatic transmission, 3.91:1 welded diff, w126 560sel 2nd gen front brake conversion.
on the dyno
Image
Image

Dyno graph
dyno scan:http://i1164.photobucket.com/albums/q564/yazan90/w123/4_zpsqoo2qokm.jpg don't know why it shows 0.9 bar on the paper, but on the datalog it was 0.8 bar

Image

It made 368 nm @3800 rpm and 222 whp @5000 at 0.8bar , it reached the original engine torque which is 220nm@4000 now it's @2400 and the original power with is 150hp@5800 now it's @3200
I'm extremely happy with the result as i know there is more dew to high iat caused by the small intercooler and weather here won't help either .
Also if you look at the graph there is a drop in the torque around 4400 i think that happened because i switch the vvt off at 4300, it will be back on the dyno with more boost and other upgrades.
As for the drive it's really great the torque is instant a bit similar to the supercharge but with more boost, as for the turbo (holset hx30) you won't reach a high hp number but it spool very fast with great sound as plus, in one off the datalog in 4th or 3rd gear i was on full boost at 2700 with 60%tps.
For future upgrade, first a bigger intercooler is a must, and i always wanted to try water injection both pre turbo and after ic. also i was thinking to install the supercharger back to make it a twincharged it should be fairly easy since the new exhaust manifold clear it better than the original one but not sure how i benefit from that with this turbo as it spool fast, maybe with hx35 or hy35 would be more suitable.
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Re: Mercedes w123 - 2.2L Turbo

Postby 123turbo » Tue May 31, 2016 11:27 pm

Ni e work, i am working in mine too, 123 2.3 8v, turbo, Megasquirt 3x
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Re: Mercedes w123 - 2.2L Turbo

Postby WestfieldMX5 » Wed Jun 01, 2016 1:00 am

very nice, impresssed with the result. I'm not familiar with these engines, how much boost can a stock engine safely handle?
2016 Westfield SEiW MX5 1.8 - 6sp - Torsen - MSM turbo - MS3 Pro - 3kg/hp
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Re: Mercedes w123 - 2.2L Turbo

Postby yzn » Sat Jul 16, 2016 10:59 am

123turbo wrote:Ni e work, i am working in mine too, 123 2.3 8v, turbo, Megasquirt 3x

MS3 is the right choice. MS3 is on the lists of upgrades

WestfieldMX5 wrote:very nice, impresssed with the result. I'm not familiar with these engines, how much boost can a stock engine safely handle?

These engines seems to be a bullet proof, very underrated even so they are fairly cheap.
There are many variety in these engines starting from 1.8L to 2.3L and from 8.8:1 to 10.5:1 compression, how much boost they can handle depending on the engine you using, i will test the current engine to 1-1.2 bar boost before switching to m111.975 or m111.973 that are 2.3L and 8.8:1 comp which are thought to be the ones for high boost
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Re: Mercedes w123 - 2.2L Turbo

Postby adamatoom » Tue Jun 13, 2017 10:38 am

hey yzn i am from Jordan and i was thinking about going with this exact setup (w123 with a turbocharged m111) using a megasquirt ecu, could you give me some tips about this kind of project?
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