The fall and rise of a works SFC engine

sfcpiet said:
Rest assured, the flange was most probably simply hacked off, the edges have been smoothed manually with a pneumatically driven burr or similar.

piet

Typical Laverda Tuning Treatment back in the Day, mady by Locksmiths Brutality
 
I'm looking forward to seeing this engine develop. Keep us informed Piet, I for 1 am very interested.  And... good luck.
 
Made some spare parts and cleaned up the ragged edges...
 

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Started fitting the bits.

Recieved a precision ground steel plate today to fix to the cylinder base surface in order to keep everything straight.  Both cases are still surprisingly true at the mating surface, see how it all goes when it's bolted up for welding.

piet
 

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Tackling the difficult one tomorrow...
 

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Wow - what a puzzle!

I liked the article about the old Ford engine and it's name "Patch" very much. Curing this 73 SFC engine is far more challenging
and would also deserve a project name - unfortunately I can't think of a suitable one right now ...
:)
 
Jo said:
Wow - what a puzzle!

I liked the article about the old Ford engine and it's name "Patch" very much. Curing this 73 SFC engine is far more challenging
and would also deserve a project name - unfortunately I can't think of a suitable one right now ...
:)

The fall and rise of a works SFC engine - Humpty Dumpty

https://www.youtube.com/watch?v=0oKreL1jvkg
 
rowdypat said:
...and a special thank you to the organ donors  ;)

No living Laverdas were harmed for production of these vital parts! :D

The bits were donated by a knackered crankcase that had been destined as a crankshaft transport container.  Hadn't been used for decades.

piet
 
No such sophistication here Gerald.

Donor case was hacked to bits with an angle grinder, quick, but messy and loud.  I had to be sure there would be enough material to work with, so the cuts were well on the generous side.  The window in the lower case was cleaned up on the milling machine, turned out nice and square.  Patch for the lower case was shaped on the mill, as I had the dimensions of the window in the case.  That was the easiest bit.  The rear hole was cleaned up with a carbide burr in a pneumatic grinder, the patch was shaped entirely by hand, checking and re-checking for fit.  In the pic, that's a bit of cardboard jammed in to hold it in place for the photo. 

Made a lot of swarf today, fettling and fitting the front patch, pics to follow.

piet
 
Next installment...

Was a bit fiddly! :D

Unfortunately, the shape of the cases differ a bit, the curvature and ribs are not an exact match.  But I reckon you'd need to look closely when it's done.  Bringing it to the welder Monday, will probably take until the end of the month.

piet
 

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