M110 performance project
 

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)

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?

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

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. =)

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

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.

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.

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

https://farm4.staticflickr.com/3852/...96d19877_h.jpg

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.

ross racing pistons
 

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.

What's the latest?
 

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

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.

Attachment 134675

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.

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

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

Regards.