Author Topic: 1/4 scale Porsche 917 180 degree V12 Build  (Read 27998 times)

Online Jasonb

  • Full Member
  • *****
  • Posts: 8634
  • Surrey, UK
Re: 1/4 scale Porsche 917 180 degree V12 Build
« Reply #375 on: November 20, 2022, 08:24:04 PM »
Found it, as Kim says it's a Short. Hold your phone in landscape next time which is better for PC and tablet screens anyway.

video

Online steamer

  • Global Moderator
  • Full Member
  • *****
  • Posts: 12007
  • Central Massachusetts, USA
Re: 1/4 scale Porsche 917 180 degree V12 Build
« Reply #376 on: November 21, 2022, 02:11:02 AM »
14 connecting rods done! 12+2 spares, and I didn't scrap a single one! Onward! time to make some bearing shells to fit the crankshaft laying along side all these rods.
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline RReid

  • Full Member
  • ****
  • Posts: 985
  • Northern California
Re: 1/4 scale Porsche 917 180 degree V12 Build
« Reply #377 on: November 21, 2022, 02:24:44 AM »
What a fantastic little toy box! You and Mike (Vixen) certainly set a high bar! :ThumbsUp: :ThumbsUp: :cheers:
Regards,
Ron

Online steamer

  • Global Moderator
  • Full Member
  • *****
  • Posts: 12007
  • Central Massachusetts, USA
Re: 1/4 scale Porsche 917 180 degree V12 Build
« Reply #378 on: November 21, 2022, 02:58:23 AM »
What a fantastic little toy box! You and Mike (Vixen) certainly set a high bar! :ThumbsUp: :ThumbsUp: :cheers:

I'm not even in the same zip code as Mike..... :AllHailTheKing:
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline Roger B

  • Global Moderator
  • Full Member
  • *****
  • Posts: 5626
  • Switzerland
Re: 1/4 scale Porsche 917 180 degree V12 Build
« Reply #379 on: November 22, 2022, 07:13:04 PM »
That's a fine collection of parts  :praise2:  :praise2:

You can beat the short thing on YouTube if you copy the link as soon as you start to upload before it gets changed to a short format. This link will work on the Forum.
Best regards

Roger

Online steamer

  • Global Moderator
  • Full Member
  • *****
  • Posts: 12007
  • Central Massachusetts, USA
Re: 1/4 scale Porsche 917 180 degree V12 Build
« Reply #380 on: November 25, 2022, 03:22:06 PM »
Thanks for looking in everyone    next on the agenda is rod bearings.   I'll need to make 24 bearing halves  mostly on the lathe    we got off to a bad start yesterday fora bunch of different reasons so we're having our Thanksgiving today instead but maybe later today I'll get into it.  Mostly lathe work I think..
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Online steamer

  • Global Moderator
  • Full Member
  • *****
  • Posts: 12007
  • Central Massachusetts, USA
Re: 1/4 scale Porsche 917 180 degree V12 Build
« Reply #381 on: November 26, 2022, 01:40:20 AM »
All set for first and second op tomorrow...
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Online steamer

  • Global Moderator
  • Full Member
  • *****
  • Posts: 12007
  • Central Massachusetts, USA
Re: 1/4 scale Porsche 917 180 degree V12 Build
« Reply #382 on: November 27, 2022, 01:43:12 AM »
Op 1 of the rod bearings nears completion.   24 bushes make 24 bearing shells, 2 for each connecting rod,   Next step is to cut these exactly in half and then reassemble in a fixture and bore to final size.

Bearing OD and the width are pretty critical, and I'm trying to hold+/- .0005" on the bearing diameter.   This is not that bad if I leave the tool holder in the tool post, but repeatability of my chinease AXA wedge type is about is more like +/- .001" at best.....maybe time for a genuine Aloris!

Dave
 
« Last Edit: November 27, 2022, 01:49:06 AM by steamer »
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Online steamer

  • Global Moderator
  • Full Member
  • *****
  • Posts: 12007
  • Central Massachusetts, USA
Re: 1/4 scale Porsche 917 180 degree V12 Build
« Reply #383 on: December 03, 2022, 11:22:23 PM »
OK   I've been sick for a week.   The flu...NOT covid....but I'll tell you   It kicked my ass!

I've been non functional since last Sunday...I missed work....and stayed in bed......so

Today...I felt much better.....finally....though I'm still in a fog

I was able to get 30 bearing shells complete, and a first pass at the fixture to split them.   I'm stopping there
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Online Kim

  • Global Moderator
  • Full Member
  • *****
  • Posts: 5915
  • Portland, Oregon, USA
Re: 1/4 scale Porsche 917 180 degree V12 Build
« Reply #384 on: December 03, 2022, 11:31:34 PM »
30 bearing shells is nothing to sneeze at Dave!  That's a lot of work there.

Kim

Offline crueby

  • Full Member
  • *****
  • Posts: 15468
  • Rochester NY
Re: 1/4 scale Porsche 917 180 degree V12 Build
« Reply #385 on: December 04, 2022, 12:31:11 AM »
Glad you are feeling better!

Online steamer

  • Global Moderator
  • Full Member
  • *****
  • Posts: 12007
  • Central Massachusetts, USA
Re: 1/4 scale Porsche 917 180 degree V12 Build
« Reply #386 on: December 04, 2022, 01:43:34 AM »
Thanks guys.    Well   it was a false start, as I'll need to redo the fixture just a touch.   The idea is to grab a shell blank in the vise, as shown in the picture just below the center of the bearing diameter shown above as a bushing, while in the fixture which will locate it.   First operation is to machine half of it off.  Second is to drill a hole exactly in the middle of it.   This hole is a retaining pin hole for the rod side, and a lubrication hole for the cap side.   It needs to be cut right on the flys back side down the middle, so that the cap will have enough grip.       This should be a challenge for sure!!  Which is why I made a bunch!    I need 14 pairs...so I get to screw up a few in the process .......Tomorrow though!

Dave
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline Admiral_dk

  • Full Member
  • *****
  • Posts: 3015
  • S°ften - Denmark
Re: 1/4 scale Porsche 917 180 degree V12 Build
« Reply #387 on: December 04, 2022, 10:47:48 AM »
No fun, no matter what Virus that floors you  :-\  ..... glad you are felling better  :)

I agree with Kim - 30 bushings on your rebound is nothing to sneeze at  :cheers:

Per

Online Vixen

  • Full Member
  • *****
  • Posts: 2646
  • Hampshire UK
Re: 1/4 scale Porsche 917 180 degree V12 Build
« Reply #388 on: December 04, 2022, 08:50:17 PM »
OK   I've been sick for a week.   The flu...NOT covid....but I'll tell you   It kicked my ass!

'Man flu'....... that's the worst kind  :censored: :censored:

Mike
It is the journey that matters, not the destination

Oh! sod the journey, lets hit the bar and pool instead.

Online steamer

  • Global Moderator
  • Full Member
  • *****
  • Posts: 12007
  • Central Massachusetts, USA
Re: 1/4 scale Porsche 917 180 degree V12 Build
« Reply #389 on: December 04, 2022, 09:09:49 PM »
OK   I've been sick for a week.   The flu...NOT covid....but I'll tell you   It kicked my ass!

'Man flu'....... that's the worst kind  :censored: :censored:

Mike
I can't remember the last time I was layed out for.a full week....not good
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!