Y’know… I’ve never actually seen one…
Where are the valves?
Are the rocker arms underneath…?
This thing looks like it belongs in a sports car or a speedboat…
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Flat-heads have exactly that, heads that are flat. The valves seat to the engine block, no rocker arms. The cam pushes on the end of the valve so there is no push-rod either.
ReplyDeleteThere are functional limits to the compression ratio which was not an issue when gasoline chemistry limited compression to 6:1 else knock occurred. The other shortcoming was losses due to thermal conduction which lowered thermodynamic efficiency.
CHeap to make unless the block got scrapped because of a botched valve seating job. And rugged.
Overhead cams then, Joe?
Deletethere you go drinking too much Sanka again, cam is in the block below the valves.... here is a good diagram: https://d39a3h63xew422.cloudfront.net/wp-content/uploads/2013/07/20104316/ford-s-flathead-v8-fueled-the-hot-rod-revolution-1476934824464-500x563.jpg
DeleteYeah; the camshaft was pretty much where it is in an overhead valve engine. The flathead just does away with the pushrods, lifters, and the rocker arm assembly, pushing on the valves directly.
DeleteThanks Mike Silvius!
DeleteNope not marine engine... just a flathead V8 with a direct drive blower. Side valves in the block like this:
ReplyDeletehttps://jandjrepairandrestoration.com/ford-flathead-v8-engine/
I was gonna say; a marine engine would have no use for a fan, as cooling was either done through raw water being pumped through the engine, or through a closed system that used raw water for cooling through a heat exchanger. I had a friend with a boat where the closed system's heat exchanger was just a pipe that ran stem to stern along the keel. The closed system water cycled through that after picking up heat from the engine. Neanderthal, but effective...
DeleteAhhhhhh ... thanks fellas! Muchly appreciated. I was having problems visualizing how the headers worked on those. And thank you Pete...I shoulda figured that one out too.
DeleteGuess I'm not firing on all 8...
The flathead V8 is just the next progression of the four cylinder Ford model A engine.
Deletehttps://youtu.be/GGn-5VoS-m8
Good friends dad had one on a trailer for pumping tailwater back to the uphill irrigation pipes. It was old when I was a kid, but I wanted to fix it to hear it run. I think they are pretty cool engines and would run forever on natural gas or propane.
ReplyDeleteway back in high school I had a part time job at a scrapyard. I remember seeing a lot of old flat head parts like what's on that engine
ReplyDeletebeing sold as scrap. I did save a few of the neater items only to have my dad get rid of them while I was in the army. is that a paxton supercharger on that thing ? I know the carbs are stromberg 97's i think.
one of the best things I did save but lost was a tri power setup for a 66 or 67 pontic big block, even had the air cleaner that was factory ! but dad found it and it's went to scrap,,
One odd problem is excess heating, because the exhaust passage goes through the water jacket in the block, and between the cylinders to get to the outside of the block.
ReplyDelete