Hello to you all!

I'm about to start this project with my coupe, 1980 original carburated euro M110 with 722.111 transmission, it has just 150 000 kilometers on it.

My plan:
1) Triple Weber DCOEs, 40s.
2) new main and rod bearings
3) cylinder work with OEM repair size-pistons or custom Ross Racing ones
4) Dbilas or AMG -cams (yes, there is a shop in Finland that modifies stock cams to AMG-specs)
5) custom exhaust manifold and pipe, later on
6) adjustable cam sprockets interest me very much, I need your help with those
7) Main, rod and head studs with ARP-stuff
8) Basic head work, seating valves etc

I'm pretty confident about the engine, what worries me is the automatic gearbox. Should I go with the original 722.1, maybe little rebuilding (although it works flawlessly) or get a 722.3? Original numbers of the engine are 156 hp with ~230 Nm of torque.

I'm going to be updating this thread as the project starts/moves on, all kinds of help is very welcome. Thank you and cheers!

And yes, it is going to be a street car, so lots of carb tuning ahead (even though I'm used to drive with a modified Solex 4A1 with warped body, it's working very well after sonic wash and a full rebuild)

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1980 280 C - dark metallic blue, AMG Pentas 16x8/9

Why carburetion when there are more options available? Why standard ignition when you can go EDIS which will give you the ability to seriously manage your performance? Why M110 when for probably less money you can drop in a M104 with a much higher performance potential?

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“Whatever story you're telling, it will be more interesting if, at the end you add, "and then everything burst into flames.”
― Brian P. Cleary, You Oughta Know By Now

go with the 722.3, ur oe box wont last much trust me, and the 722.3 is more efficient

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Jay,
-----------------
-1995 Blue W202 C36 AMG (M) SOLD ;(
-1995 Black W140 S500 (Lady)
-1992 Black W124 E300 (Dima) (Ex-Mosselman
Twin turbo Kit).
-1988 Black W124 300 E 4-Matic.(Nadeen)
-1983 Brown W126 500SEL.(Old Lady)(Sold)
-1981 Gold W123 280CE.(Dareen)(Sold)
http://www.youtube.com/user/jayrasheed

I have also Audi V8 quattro, 4.2 litres, 32 pcs of hydraulic lifters which is enough for me.

I want to keep things simple, not a single microprocessor that controls the engine in any way. I think it's more "fail-safe". Also this is my summer car, i want to keep things old-school.

Yes, I will go with 722.3, gotta start looking for a decent one. =)

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1980 280 C - dark metallic blue, AMG Pentas 16x8/9

check this thread it could be helpful
http://www.peachparts.com/shopforum/performance-paddock/333649-my-m110-performance-build-thread-2.html

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W123 - M111+Turbo

I'd recommend replacing the points in the distributor with a Pertronix or Hot Spark electronic switching module along with the recommended hotter coil.

You won't have to worry about point wear and dwell settings, and have even more simplicity with the benefit of better performance.

Ed A.

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http://i19.photobucket.com/albums/b1...c/GOWIDE-1.jpg
1971 280SL ROADSTER
1988 300CE TWIN TURBO WIDEBODY
1994 E320 CABRIOLET
1999 C43 AMG
2005 G55K AMG
2008 CLK63 AMG BLACK SERIES

Update: got the engine torn apart. Cylinders must be re-bored, 6th had about 0,2 mm deep hole from corrosion.

E-mailed a machine shop about filling and grinding crank rod-journals to fit narrower rods, originals are very heavy due to "extra" oil channel and good build, and new ones that are 28 mm wide with correct big-end-bore are impossible to find.

Correct bore is hopefully going to be 86.5 mm, to have some room in the future if needed. I haven't evaluated the block that carefully, leaving it to the machine shop.

Pistons are going to be Ross, custom made, with design that rises the compression to about 10:1.

That's all for now, going to add pictures when there's a bit more progress.

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1980 280 C - dark metallic blue, AMG Pentas 16x8/9

Got the pistons, guess they are quite busy at Ross.

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1980 280 C - dark metallic blue, AMG Pentas 16x8/9

Jezzma:

From the piston picture it appears that you have retained the original compression height and wrist pin diameter.
Given that, rather than having custom con rods also made, it may be to your economic advantage to simply clean up the original rods with beam polishing and removal of the balancing pads to the extent possible. The additional weight of the wider big end of the rod will not be a disadvantage for a street engine.

Had you selected an off-the-shelf aftermarket con rod of 5.4"(~137mm) length w/ 48mm bearing, then the pistons could have been made for that combination of compression height and pin diameter.

Thanks Frank,

Yes, the pistons were designed for the original con-rods, I decided not to put too much money in this project.

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1980 280 C - dark metallic blue, AMG Pentas 16x8/9

hi jezzma, i am looking into getting some ross racing pistons made, there should be a jc number (job card )number on the Box, could you list this number for me .sent you a pm on this we are neighbours by the way..I am in norway.

Been awhile since any more updates, wondering what developments have taken shape?

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Dedicated to the preservation of antique Mercedes Benz's, one rusty ol' bucket of bolts at a time!

This project has been on hold for a while because I've been busy doing other things.

But today I got this: torque plate for machining cylinders, i'll probably can get the block to the shop next week.



I arranged a pickup for 722.3 gearbox later this month, the seller also has two spare M110 engines, he said I can have them.... I am ok with that.

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1980 280 C - dark metallic blue, AMG Pentas 16x8/9

Is this project still on hold or has some progress been made that we haven't heard about?

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Dedicated to the preservation of antique Mercedes Benz's, one rusty ol' bucket of bolts at a time!

Did anyone find out what the Ross pistons Job car number from Jeezma btw?

Regards.