Go Back   The Ford Barn > General Discussion > Model A (1928-31)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 01-08-2015, 02:31 PM   #1
some mech 3
Member
 
Join Date: Jul 2010
Posts: 35
Default 4 cycle, L head

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.

[email protected]
some mech 3 is offline   Reply With Quote
Old 01-08-2015, 02:52 PM   #2
emf
Senior Member
 
emf's Avatar
 
Join Date: Mar 2013
Location: Hudson, NY
Posts: 510
Default Re: 4 cycle, L head

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
emf is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 01-08-2015, 03:08 PM   #3
Tom Wesenberg
Senior Member
 
Tom Wesenberg's Avatar
 
Join Date: May 2010
Location: Mpls, MN
Posts: 27,582
Default Re: 4 cycle, L head

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.
Tom Wesenberg is offline   Reply With Quote
Old 01-08-2015, 03:12 PM   #4
pooch
Senior Member
 
pooch's Avatar
 
Join Date: Sep 2010
Location: South Coast NSW Australia
Posts: 2,596
Default Re: 4 cycle, L head

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 by pooch; 01-08-2015 at 03:27 PM.
pooch is offline   Reply With Quote
Old 01-08-2015, 03:27 PM   #5
Patrick L.
Senior Member
 
Patrick L.'s Avatar
 
Join Date: May 2010
Location: Largo Florida
Posts: 7,225
Default Re: 4 cycle, L head

Quote:
Originally Posted by pooch View Post
Ans what alphabetical letter would you give a 20/s harley with a sidevalve exhaust and overhead valve inlet.
Inlet Over Exhaust [ IOE ], or, also known as F head. There are few engines with the opposite configuration [ EOI ] .
Patrick L. is offline   Reply With Quote
Old 01-08-2015, 04:32 PM   #6
some mech 3
Member
 
Join Date: Jul 2010
Posts: 35
Default Re: 4 cycle, L head

Sponsored Links (Register now to hide all advertisements)
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
some mech 3 is offline   Reply With Quote
Old 01-08-2015, 04:36 PM   #7
some mech 3
Member
 
Join Date: Jul 2010
Posts: 35
Default Re: 4 cycle, L head

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
some mech 3 is offline   Reply With Quote
Old 01-08-2015, 05:05 PM   #8
Chuck Sea/Tac
Senior Member
 
Chuck Sea/Tac's Avatar
 
Join Date: May 2010
Location: Between Seattle & Tacoma
Posts: 2,351
Default Re: 4 cycle, L head

Now all you have to do, is figure out how not to double post! (Smiley face)
Chuck Sea/Tac is offline   Reply With Quote
Old 01-09-2015, 11:15 AM   #9
some mech 3
Member
 
Join Date: Jul 2010
Posts: 35
Default Re: 4 cycle, L head

Chuck Sea/Tac: My wife and I enjoyed your suggestion.

Sam
some mech 3 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 02:16 PM.