Ferrari 550/575M pulley notches

Right! That's the difference between an ignition trigger on the lower end and a trigger on the upper end.

 

Not so on the 575M/612, though, which have COP ignition and no wasted spark.

 

How do they trigger?

 

It looks like 575 still has two optical sensors on the clutch housing. How do they avoid the wasted spark? Sensor on cam too? Curious about that. Never studied a COP system.


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Yes they have a trigger on the right bank inlet cam in addition to the two sensors at the flywheel.

I think my assumption regarding the two ecu's reading these 3 triggers identifies to them which is the firing stroke after the first revolution. I can find no other markings listed in the WSM to differentiate between both TDCs physically, even though the manual states that piston 1 should be at tdc on that stroke

 

Complete phase sensor? #33? Wonder what the point of avoiding wasted spark is? Seems some COP systems use it? Not enough time to charge COP?


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That's it. No idea, outside of my knowledge base, keen to learn more though.

At some point I need to delve into the workings of the Bosch 7 system, but its all witchcraft at the moment to me while I just nail the engine together.

 

And why is the cam sensor not enough? Why flywheel sensors too? Very strange. Perhaps an evelotution and not a brand new design?

 

I had another good read of the WSM and it keeps saying to set tdc to piston 1 at the explosion stage, but never says which of the two tdc that is. However in order to establish the correct tdc the manual goes on to say fit the special degree wheel and it should be at zero degrees with all 4 cams aligned to the timing notches.

Looking at the degree wheel in the pic it looks as if there is a screw on the top which I can only think seats into the groove of the woodruf key on the crank to correctly align the wheel to the crank, so in that scenario if the crank was 180 degrees out then the gauge wont fit onto the crank properly.

I am at my workshop Sat, so will take a look at the nose of the crank to see if the woodruf key groove is at 12 oclock when piston 1 is at tdc for either of the two rotations.
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CribbJ (John) has fully researched this nad is the inventor of the MSW 550 COP conversion. Let me tell you it is sweet! COP's on a 550 is the only way to go. He can tell you exactly how the system works stock and cop.

 

I’ve not done this but I have read you have to set the degree wheel TDC with a dial guage or a dead stop. Basically you go forward and back of TDC and split the difference on the degree wheel to find TDC. Then you move the degree wheel pointer to that spot at 0 degrees. Google it for video examples.

 

That is a good way that works close but not ferrari's way for exact ferrari specs.