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Evolving the Side valve flat head design idea

Engine tech, for those engines, products, and technologies of yesteryear.

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prechamberflatty
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Re: Evolving the Side valve flat head design idea

Post by prechamberflatty » Mon Oct 21, 2019 8:09 pm

A better flathead yes and this is my effort.
In my case not trying to outdo an OHV or OHC
not trying for high hp and high rpm, they do that
very well already so really the flatty is relegated
and worthwhile pursuing what it is really good for
eg. cruising and torque.

Therefore fast burning is not necessary unless
you are aiming for high hp instead of torque
It is not the case in my design.
Slow burn, more torque via reliable flame propagation
via control of charge flow and expansion events.

I also have the same design using a single valve
and separate inlet and exhaust ports which naturally
have no overlap.

prechamberflatty
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Re: Evolving the Side valve flat head design idea

Post by prechamberflatty » Tue Oct 22, 2019 3:27 am

The single valve version concept uses a slide rather than a valve
but needs plasma sprayed low friction coating along with secondary mazda
rotary apex seal springs. Also is correctly a side valve setup but sits higher
up in the head and allows a more direct 45 degree inlet and 30 degree exhaust port.
Its for another thread though as its for a 2 stroke e85 weed wacker setup.

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Re: Evolving the Side valve flat head design idea

Post by gruntguru » Thu Oct 24, 2019 8:49 pm

Whenever someone says an engine is "torquey" my brain says "no power".

pdq67
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Re: Evolving the Side valve flat head design idea

Post by pdq67 » Fri Dec 27, 2019 6:29 pm

How about putting the valve seats in the head along with both ports so the valves operate in reverse??

The valves would still be in the block so it would still be a flathead... Only the seats and ports would be in the head...

pdq67

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Re: Evolving the Side valve flat head design idea

Post by jed » Sat Dec 28, 2019 9:46 am

Seats in the head and valves in the block. How exactly does that work???

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Re: Evolving the Side valve flat head design idea

Post by pdq67 » Sat Dec 28, 2019 1:14 pm

The cam is made so that the valves seat in the seats in the head!!

There will however be valve stems in the way in the combustion chamber when the valves operate.

I personally like the I want to say the, Oakland, flat head V-8 that had the valves in the block horizontally located. The cam in the engine v operated the valves by using vertical rockers

I am pretty sure the H.A.M.B. has a really long thread on it with a section view picture of this engine AND I am right in the middle of the thread.

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Re: Evolving the Side valve flat head design idea

Post by Stan Weiss » Sat Dec 28, 2019 1:55 pm

pdq67 wrote:
Sat Dec 28, 2019 1:14 pm
The cam is made so that the valves seat in the seats in the head!!

There will however be valve stems in the way in the combustion chamber when the valves operate.

I personally like the I want to say the, Oakland, flat head V-8 that had the valves in the block horizontally located. The cam in the engine v operated the valves by using vertical rockers

I am pretty sure the H.A.M.B. has a really long thread on it with a section view picture of this engine AND I am right in the middle of the thread.

pdq67
Please explain just what does this mean. :?

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Re: Evolving the Side valve flat head design idea

Post by pdq67 » Sat Dec 28, 2019 5:06 pm

Stan,

It may not be possible to do what I am talking about which is just design the cam so that at what is open on a standard cam will be closed with the seats in the head!

Maybe can be done using a Ducati type engineered, "Desmodromic", valve system's positive valve retention, who knows???

pdq67

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Re: Evolving the Side valve flat head design idea

Post by Nikolas Ojala » Fri Jan 03, 2020 1:54 pm

pdq67 wrote:
Sat Dec 28, 2019 1:14 pm

I personally like the I want to say the, Oakland, flat head V-8 that had the valves in the block horizontally located. The cam in the engine v operated the valves by using vertical rockers

I am pretty sure the H.A.M.B. has a really long thread on it with a section view picture of this engine AND I am right in the middle of the thread.
I suppose you mean this kind of flathead engine.
Lycoming_flathead_V8.jpg
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Re: Evolving the Side valve flat head design idea

Post by pdq67 » Fri Jan 03, 2020 4:33 pm

That's it Nikolas!!

I think Pontiac ended up with it around '32 or so, but canned it and kept their straight engines.

Please check me here??

pdq67

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Re: Evolving the Side valve flat head design idea

Post by Nikolas Ojala » Fri Jan 03, 2020 5:28 pm

There is also a nice view to the valve train.
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Re: Evolving the Side valve flat head design idea

Post by PackardV8 » Fri Jan 03, 2020 5:48 pm

The horizontal valve design had a brief vogue in the late 1920s, but died out in the 1930s. The Auburn 12 became the American-LaFrance V12.

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Re: Evolving the Side valve flat head design idea

Post by Nikolas Ojala » Fri Jan 03, 2020 7:02 pm

I'd like to see drawings of Cadillac V-16 flathead engine. Anyone?

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Re: Evolving the Side valve flat head design idea

Post by pdq67 » Sun Jan 05, 2020 3:11 pm

Me too!!

pdq67

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Re: Evolving the Side valve flat head design idea

Post by Dan Timberlake » Mon Jan 06, 2020 12:44 pm

http://www.alfv12.com/images/alfv12/tn_002.jpg

Hey ! That's a motor. Must have a couple of electrical connections somewhere.

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