Porsche 917 flat 12 engine

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After completing the external milling and drilling of the 2 engine half-blocks , I had to bore the crankshaft seat
The motor block is 320 mm long (12,6 inch), it is not possible to do the boring with my milling machine.

I therefore made a jig for lathe , with a boring tool between spindle and tailstock

IMG_1454.JPG
 
Man do you sleep some times?
Just a couple of weeks and it will run.
 
Great project. Looking forward to seeing and hearing it run.
Cheers
Willy
 
it is the lockdown that makes me work in my shop, we are not allowed anything else but it will soon end , i hope

Good luck with covid ending soon - - - - dunno where Italy is at but here we are starting the 3rd round.
My guess is that there is at least one if not a few more.

Wonder what our societies are going to look like when this is done?
(Our economies are already is real trouble and more - - - - well - - - - I' stopping there!)
 
Good luck with covid ending soon - - - - dunno where Italy is at but here we are starting the 3rd round.
My guess is that there is at least one if not a few more.

Wonder what our societies are going to look like when this is done?
(Our economies are already is real trouble and more - - - - well - - - - I' stopping there!)

Next week we will be free again, restaurants, bars, cinemas, museums open until 10pm, but respecting all safety regulations, distancing, masks and limited number of people
I hope this is the last time, we are proceeding with vaccinations..
 
My cylinders: bore 26 mm, stroke 21.4 mm, displacement 11.35 cc, total displacement for 12 cylinders :136 cc
Material: cast iron G25
The original cylinders: Bore 86 mm (3.4 in), Stroke 70.4 mm ( 2.8 in), compression 10.5:1 , displacement 4907 cc , 299.4 cu in
Note that the stroke is much less than the bore, it is a competition engine


IMG_6436.JPG


my drawing , the seal whit the head is guaranteed by a viton o-ring

cilidro.jpg
 
I just found this thread. Very impressive work! I drove through Modena on my way to Bologna. I visited the Ducati factory which was excellent.

Enjoy your freedom next week.
 

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