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-   -   Flat head converted to overhead valve (https://www.onlycubcadets.net/forum/showthread.php?t=58317)

DRohacek 02-18-2021 10:35 PM

Flat head converted to overhead valve
 
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This pulling engine is an aftermarket flathead Jones block . It is a heavier built block modeled after a Kohler K series that uses K series type parts. We turned this into an overhead valve engine using an Oldsmobile 455 head with roller rockers and other aftermarket parts inside to end up at 53 cubic inches and 13.5 compression

Attachment 107328

DRohacek 02-18-2021 10:38 PM

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More photos

DRohacek 02-18-2021 10:52 PM

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Couple more

twoton 02-20-2021 06:54 PM

Very cool. :beerchug:

DRohacek 02-20-2021 11:29 PM

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Quote:

Originally Posted by twoton (Post 505662)
Very cool. :beerchug:


Thanks. I started with the Stromberg 2 barrel on gas but eventually changed it to a 44 Mikuni side draft on Methanol.

V30crewcab 02-27-2021 11:20 AM

that is impressive. why cut up the head though, would it not be easier to build a custom head, or is that not allowed in the rules?

DRohacek 02-27-2021 09:07 PM

Quote:

Originally Posted by V30crewcab (Post 505899)
that is impressive. why cut up the head though, would it not be easier to build a custom head, or is that not allowed in the rules?

To make a head from scratch out of billet aluminum would require a tremendous amount of machining. When you are done it would not necessarily be any better. No need to reinvent the wheel, just adapt a known good wheel to the project. Additionally, I acquired this head from a friend because it had a crack on one of the intake ports where it had been ported to deeply. Essentially it was junk to use on a V8 again but was perfect for my plan and big valves had already been installed. I used roller rockers and fit it to the block.

DRohacek 02-27-2021 09:20 PM

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Intake is 2.15 pretty good flowing head to.

V30crewcab 02-28-2021 10:06 AM

cool. its amazing what you can make work!

Odmark 04-14-2022 01:18 AM

This is so cool! I would love to hear it run


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