Another M44 stroker Build 90mm Crank Question

[mt500ish]

Hi All as you can see am this far

I have m57 short nose 90mm crank.
Euro s50 86mm pistons.
M52 2.8 135mm conrods with 21 mm small ends the conrods were made to order from racingpartsfactory-uk and delivery was within 2 weeks.
The problem is the nose/snout extension does anybody make them for sale or have a drawing or measurements to make one please.
The engine builder is not to happy about making one without see one or pictures of one.
Hope somebody can help thanks

[MrPhatBob]

On page 8 of this PDF from Metric Mechanic:
http://www.metricmechanic.com/pdf/M42-Engine-Booklet.pdf

You can see the process in a little detail.

[mt500ish]

Thanks for reply .
Loads of help will keep up dating with progress.
Have been building for a while nearly 2 years lol.

[Darky]

Hello

There are 3 ways to do this.

1. Machine new snout that slots over the existing snout. But this might crack either the new part or the crank.
2. Weld m42 snout on at the front bearing and then get the bearing machined back to original specs. Again might crack.
3. This what we did machined m42 snout dipped it in liquid nitrogen, very cold causes metal to shrink.
The m47n tu2 crank (same as yours from looking at it) was machined out at the first counterweight and heated to 80 deg c in pie warmer. Lol
Causing the metal to expand. The 2 where then pushed together with a little weld behind the counter weight.

Good luck
Rohan

Don't know whether it works yet, have not started it yet!!! But looks the goods.
For more info on any of those methods pm me.

[mt500ish]

Thanks for reply.
looking at getting snout extension made?

[mt500ish]

As I am waiting for the nose extention to be made have been sorting out the ignition.
I got hold of a dynatek 2000 from a kawasaki z1000 the centre advance rotor was missing so ordered one and am waiting.
Here are some pics of a set up I have in my garden hope to starting it soon ready for the stroker.

[Venom]

More info on the intake mounted to the engine please?

[mt500ish]

I bought the whole setup from a man who had them on m42 engine in a mark 2 ford escort.
I will take some more pics soon as at the moment the engine is difficult to get to.

[Venom]

Please do!  Very interested to see more!

[mt500ish]

Am still trying to sort engine here is the nose extension with oil pump pick and now just waiting for key way.

[Darky]

Neat

So the way you have done this is by making a one piece attachment? That slides over the crankshaft?

Cheers Rohan

[mt500ish]

In the  pic the nose part was machined off an m40 crank now the diesel crank is going to be machined to the same diameter then a keyway will be cut so all the parts in the bottom pic slide over everything.
The oil pump pick up then the timing chain sprocket with a diesel crank bolt
here is pic of the nose with the oil pump sprocket.
When the block is together will see how much have to deck the block so see about c/r.

[mt500ish]

Venom really sorry for delay here is pic of the manifold

[mt500ish]

Went to see progress today just a little question please.
I have 90mm crank 135mm rods s50b30 pistons I really hope this is correct?
Do I need to deck the pistons or thicker head gasket and he is asking me about c/r and capacity in the cylinder when at tdc with m42 head.
I have found all this in the past but can not find again I am trying to get the answers before dummy building the engine.
I have m42 ported head with 6mm valves and guides there are no valve springs will s50/52 springs work all so  solid lifters or can play safe with standard m44 head.
Only need the key way cut as all together just did not have camara more pics friday?

[Darky]

Hi

Yes you will need to do your maths with regards to compression ratio.
But you need to do your head first because you need the cc or ml volume of head chamber.
You also need the height of the engine block!
Should be around 212mm

Only then can you work out where you need to deck the Pistons. Or taller head gasket.

Then you can do that and now for the trial build.

As for s50 springs on a m42 should be fine.

Cheers Rohan