Porsche 917 flat 12 engine

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Foketry

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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
 

michelko

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Man do you sleep some times?
Just a couple of weeks and it will run.
 

Willyb

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Great project. Looking forward to seeing and hearing it run.
Cheers
Willy
 

ajoeiam

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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!)
 

Foketry

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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..
 

Foketry

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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
 

jack620

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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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