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#1420607 08/14/2021 4:06 PM
Joined: Oct 2018
Posts: 59
B
Chief Bottle Washer
Chief Bottle Washer
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Joined: Oct 2018
Posts: 59
‘58 261, sure appears like the stems are canted᠁?

Happy weekend!
Jim
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Bwana-Jim #1420637 08/14/2021 7:58 PM
Joined: Dec 2008
Posts: 1,915
P
'Bolter
'Bolter
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Yes, the valve stems are inclined in the cross axis (parallel in the long axis), and intakes and exhausts are different.

Bwana-Jim #1420709 08/15/2021 3:43 PM
Joined: May 2001
Posts: 1,878
W
'Bolter
'Bolter
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Posts: 1,878
CVCC? What does that mean?


1948 3/4-Ton 5-Window Flatbed Chevrolet

33 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.
Bwana-Jim #1420711 08/15/2021 3:55 PM
Joined: Feb 2004
Posts: 28,674
H
Kettle Custodian (pot stirrer)
Kettle Custodian (pot stirrer)
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Posts: 28,674
That same head design and valve arrangement is shared by all the similar engines, 216, 235, and 261. It's not particularly efficient or modern, dating back to the mid-1930's at least, possibly further. Between the nail-head intake and the shrouded exhaust valve, the design doesn't make a lot of sense, at least to me. Maybe the designers had some specific purpose in mind, but whatever it was isn't immediately apparent.

No, it definitely isn't a "Compound Vortex Combustion Chamber"!

https://medium.com/emmett-on-wheels...olled-combustion-cvcc-works-d28f85d61372

LOL!
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
Bwana-Jim #1420771 08/16/2021 12:05 AM
Joined: Oct 2018
Posts: 59
B
Chief Bottle Washer
Chief Bottle Washer
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Joined: Oct 2018
Posts: 59
Canted valve combustion chamber. Like a Ford 351C.

Bwana-Jim #1420777 08/16/2021 12:46 AM
Joined: Feb 2004
Posts: 28,674
H
Kettle Custodian (pot stirrer)
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OK- - - -better known as a "porcupine head". I think the Fords have a few more oddball angles, not just a canted exhaust stem.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
Bwana-Jim #1420807 08/16/2021 12:38 PM
Joined: Dec 2008
Posts: 1,915
P
'Bolter
'Bolter
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True, the Ford Cleveland, Boss, 385, and BBC have their valves rotated in both planes.
Closer similarity is early Chrysler hemi, since the stems are also rotated in opposite directions.

Bwana-Jim #1420894 08/17/2021 3:53 AM
Joined: Apr 2005
Posts: 2,832
C
'Bolter
'Bolter
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Joined: Apr 2005
Posts: 2,832
The CVCC was a Ford innovation which they did not use. Honda picked it up and the first Hondas had the CVCC emblem on the sides and maybe the deck lid. Being naturally lazy the public pronounced it Civic and Honda not being dumb re-badged the cars as such.


Evan
Bwana-Jim #1420928 08/17/2021 2:38 PM
Joined: Feb 2004
Posts: 28,674
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Kettle Custodian (pot stirrer)
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I've got one of those crackerbox first-generation Hondas stashed away out in the pasture. I've been tempted to fit a small block Ford engine like a 260 or 289 and a square tubing frame to it, but so far I haven't found the time. There's also a Volkswagen square back out there that's just begging for a Crown-style mid-engine V8. I'm thinking of turning the VW transaxle around like the mid-engine sand rails do, which will get the bell housing pointed the right way, and using a Rover aluminum V8 which has in its ancestry the 215 cubic inch Buick/Olds V8's from the 1960's.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!

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