What does the V in V-6 and 8, 10, 12 stand for? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 04-26-2004, 12:00 AM   #11
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What about L? The four bangers put in GM *-series trucks was referred to as L4. I've never figured that one out. Is the crank not directly under the cylinders?
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Old 04-26-2004, 12:01 AM   #12
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I don't know either it would be nice to find out.
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Old 04-26-2004, 12:10 AM   #13
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Doesn't that refer to the head? L-head v. I-head? Meaning whether the valves are in the head or in the block? Or do i have my letters mixed up? Been awhile since i read about all that.
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Old 04-26-2004, 12:50 AM   #14
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Valves in the block? Where? Is maybe the cam to the side, and the rockers are L shaped to account for horizontal pushrods?
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Old 04-26-2004, 01:19 AM   #15
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L, line, Inline.

Our cylinder banks make a V shape.
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Old 04-26-2004, 01:53 AM   #16
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Quote:
Originally Posted by BonneMeMN
L, line, Inline.
Are you guessing, or do you know?
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Old 04-26-2004, 02:19 AM   #17
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Here we go:

F-Head: one valve in the head and the other in the block.

Hemi head: Hemispherical (cupped) head

I-Head: both valves in the head, directly over the cylinder

L-Head: both valves beside the cyinder in the block. (no rocker arms)

Valve-in-Head, Overhead Valve: same thing as I-head


Hemi was all the rage back in the early days because the hemispherical head promotes better combustion, however i think today 4 valves per cylinder, made possible by an overhead cam, is the more popular option cause you can get more air in and out of the cylinder faster.

L-head engines are generally smaller, lawnmower type engines like this one i took a picture of when it quit.
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Old 04-26-2004, 02:21 AM   #18
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glad someone found out
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Old 04-26-2004, 02:24 AM   #19
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Quote:
Originally Posted by John Deere Boy
Here we go:

F-Head: one valve in the head and the other in the block.

Hemi head: Hemispherical (cupped) head

I-Head: both valves in the head, directly over the cylinder

L-Head: both valves beside the cyinder in the block. (no rocker arms)

Valve-in-Head: same thing as I-head
Got any diagrams? I'm intrigued.
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Old 04-26-2004, 02:25 AM   #20
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me too
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