4 cycle, L head

S

some mech 3

Member
I am not an expert on the Model A, but I do know more than the average bear. I have owned three A's, and presently have a 1931 standard coupe and an unassembled 1931 standard roadster. However, I am ignorant of the designation: L head. DeAngelis uses this term and I have seen other references to it. Does the L refer to the arrangement of the cylinders, the shape of the block, etc? I have no clue and would appreciate someone educating me. Thank you in advance.

snhips@snet.net
 
It has to do with the relationship of the valves with respect to the piston/connecting rod. Picture the piston/rod in a vertical position with the both valves to the side and top of the piston travel. sort of like this:

________
l
l
l
l
l

Or an upside down L. An F head has one valve (usually exhaust) to the side and middle with the intake at the top (usually overhead). Hope that helps.

Frank

l
 
And a T block would have intake valves on one side of the piston, and exhaust valves on the other side. That's a T valve arrangement, and not the Model T Ford.
 
And what alphabetical letter would you give a 20/s harley with a sidevalve exhaust and overhead valve inlet.

edit, googled it....F head.
 
Last edited:
pooch said:
Ans what alphabetical letter would you give a 20/s harley with a sidevalve exhaust and overhead valve inlet.
Click to expand...

Inlet Over Exhaust [ IOE ], or, also known as F head. There are few engines with the opposite configuration [ EOI ] .
 
Frank, Tom, Pooch, and Patrick: Thank you all for your input to my question. They were very good answers, and I no longer am ignorant; at least on this matter.
Sam
 
Frank, Tom, Pooch, and Patrick: Thank you all for your input to my question. They were all very good answers. I am no longer ignorant; at least in this matter.
Sam
 
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