my M110 performance build thread

[odl21]

Hi,
I thought I'd share the progress of my build of a high performance M110 engine. Hopefully I may also gain some pointers on bits I need.

I have high mileage '78 core engine that i'm building to this spec:

1) dblias cams, timed in with offset woodruf keys
2) titanium flat valves
3) 260# valve springs with titanium retainers
4) CP custom forged pistons based on euro spec dome
5) carrillo custom rods (longer)
6) 0.75mm copper head gasket
7) triple weber 40 carbs on a hand made intake manifold
8) head ported, in particular smoothing of the intake port and matched to intake
9) custom ARP head studs
10) 1mm bore increase
11) crank offset ground 3mm to increase stroke - final capacity = 3025cc
12) lightened flywheel and all balanced with knife edged crank weights

my current calculations make the US spec engine actually about 7.44:1 compression ratio and mine will be 10.29:1. should make power to about 8500rpm with good torque. not sure on the power but guessing about 260-270hp.

this is going in my w123 coupe which has a close ratio 5 speed transmission and custom made low ratio limited slip diff. the car weighs about 1050kg.

still thinking about the distributor but currently planning stock with a crane CD ignition unit. i'm not too happy about the complicated mechanical drive for the distributor and oil pump and would ideally replace it with a crank trigger and dry sump oil setup. also hoping to make some kind of windage tray if space permits.

anyway, parts i need if anyone can help are:
a) flywheel
b) distributor and drive housing
c) water pump housing
d) vibration damper
e) crank and water pump pulleys
f) a good cam box with healthy bearings (one bearing was burnt out in my core engine).

i'm currently at the stage of having the engine stripped down and having measured everything for the compression calcs to allow the ordering of custom parts and am ready to have the crank and block hot tanked and machined.

i've stripped the head, cleaned and blasted it and am ready to start work on the head grinding. sonic checked the cylinder bores for thickness and figured out what valves and valve springs to use.

i've sourced all new 12.9 hardware or ARP bolts for every fastener including ARP flywheel bolts (for a ford pinto 2 litre!). also have one the fancy AMG valve covers.

designed and specified a new oil filter arrangement to take a standard large 13/16" spin on filter and use -12 braided hose for the oil return line from the head.

not managed to find a bearing to use for the smaller rod journals yet but i'm sure a call to clevite will solve that.

i'm pretty surprised how big the stock inlet valves are. no reason to go bigger, even with larger capacity and higher revs i think. also the general design and 'beefyness' of the engine is pretty impressive.