Author Topic: 917 180 degree V 12  (Read 42976 times)

Online steamer

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Re: 917 180 degree V 12
« Reply #270 on: July 15, 2019, 02:50:28 PM »
I do know that.......but my model will not have that
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Offline Vixen

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Re: 917 180 degree V 12
« Reply #271 on: July 15, 2019, 03:24:39 PM »
Did you notice the two cutouts in each of the crank webs which provide access to the big end journals? This suggests the titanium crankshaft was made as a bolted assembly, probably with Hirth couplings and big end sleeves over the joint.

Mike
« Last Edit: July 15, 2019, 09:39:29 PM by Vixen »
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Online steamer

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Re: 917 180 degree V 12
« Reply #272 on: July 15, 2019, 05:44:06 PM »
Ive not seen a crank f uo ll size that was built that way but your comments seem sound
"Mister M'Andrew, don't you think steam spoils romance at sea?"
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Offline Vixen

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Re: 917 180 degree V 12
« Reply #273 on: July 15, 2019, 06:00:09 PM »
Hi Dave,

Go back to posts 138 and 139 and you can clearly see the difference between the one piece steel crankshaft and the eight ??? piece bolted titanium crankshaft. I believe the steel crank was for the Le Mans cars and the titanium crankshaft was developed specially for the overpowered CanAm monsters. Porsche aren't telling.

Mike
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Online steamer

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Re: 917 180 degree V 12
« Reply #274 on: July 15, 2019, 08:54:26 PM »
You are correct sir!
"Mister M'Andrew, don't you think steam spoils romance at sea?"
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Online steamer

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Re: 917 180 degree V 12
« Reply #275 on: August 27, 2019, 03:28:58 AM »
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline Vixen

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Re: 917 180 degree V 12
« Reply #276 on: August 27, 2019, 12:07:06 PM »
What an incredible engine, it sounds perfect.

Not been able to find any more information about Bouland Motors. They appear to be offering the Cosworth for sale but don't give a price or delivery forecast.

If you need to ask the price..... you cannot afford one.

I hope JonC sees this Cosworth engine, it will encourage him with his build of the same engine

Mike.
« Last Edit: August 27, 2019, 12:38:38 PM by Vixen »
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Offline Roger B

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Re: 917 180 degree V 12
« Reply #277 on: August 27, 2019, 01:57:28 PM »
Very nice indeed  8)  8)  8) I am trying to work out from the Cyclon 2V accumulator if it is a glowplug engine  :thinking:
Best regards

Roger

Offline Vixen

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Re: 917 180 degree V 12
« Reply #278 on: August 27, 2019, 02:19:43 PM »
You could be right about glow plugs.

The Cosworth DFV distributor is horizontal and located in the bottom of the 'V' at the rear, just above the clutch It was driven from the pulleys at the front of the engine

There is no obvious sign of a distributor in that location on the model

Mike
« Last Edit: August 27, 2019, 03:40:45 PM by Vixen »
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Re: 917 180 degree V 12
« Reply #279 on: August 27, 2019, 05:05:23 PM »
Sliding plate induction.....so at first I was wondering about fuel injection, but I don't see a injection pump, and it appears that the fuel barbs are dummies.....but the induction is what got my attention...for the 917 project

Dave
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Damned ijjit!

Offline Vixen

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Re: 917 180 degree V 12
« Reply #280 on: August 27, 2019, 05:48:05 PM »
Yes, those throttle slides and the Lucas injection trumpets are very prominent on both the Cosworth and the Porsche engines. Thay are also big enough to let you hide conventional model carburetors underneath without them being too noticeable. Full fuel injection and dual spark ignition would be nice but glow plugs and simple carbs delivering methanol are  so much more practical.

Keep it simple.............

Mike
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