Demon V8 (multiplied 1.5)

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Foketry

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I bought the drawings over 2 years ago, waiting for my retirement and waiting to learn and improve my engine model construction technique.
Now, after building Hovell V4 and Holt 75, I try to make a more challenging project, Demon V8 x 1.5
I decided to multiply all the dimensions 1.5 times to have a piston size close to 24/25 mm, about an inch, so as not to have parts too small to mill and turn.
 

Endamur

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Me too... looking forward to your build progress. This is an engine that I am also planning to build in due course.... the 1.5x version will be very interesting. I have already modeled it in Fusion and started the CAM process. I have met Steve Huck a few times at the various shows and he has been super helpful answering any questions that I have had. Good luck with the build.
 

Foketry

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at 1.5 thats going to be pretty big. i'll be keeping an eye out.
Steve , Thanks for the great project, I'm not very knowledgeable about American engines, is this Demon derived from a Chevrolet engine ?

I followed all the posts about this engine on this forum, I studied all the published photos, now I think I have the skills to build it
 

Foketry

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A change from the original design, I made 2 seats for Viton oring for each cylinder to avoid water loss, one at the top of the cylinder, one at the bottom
 

stevehuckss396

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It shares the Chevy arrangement and firing order. Mostly because I know it by memory and that makes working on it easier for me.
 

Foketry

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cylinder liners , all built in steel except one in cast iron to check if there are differences in compression
What do you think about cast iron or steel for liners ??

IMG_8967.JPG
 

e.picler

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Hi Foketry!
Great work, congratulations! You are progressing fast.

Could you post some pictures of your lapping tool and also how you used it?

Thanks,
Edi
 

Foketry

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094E4EAD-FEC7-45B5-AEE9-AC23F672A68A.jpeg
Hi Foketry!
Great work, congratulations! You are progressing fast.

Could you post some pictures of your lapping tool and also how you used it?

Thanks,
Edi
I purchased this barrel laps in Ebay USA, only the brass body, I built the two steel parts myself.



AB8B610E-5867-4432-ADA0-CB6DBB5A6062.jpeg
 
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