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09-01-2010, 07:48 PM
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CC Member
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Join Date: May 2010
Location: charlotte nc,
nc
Cobra Make, Engine: contemporary #3072 , 390 big block, red no stripe
Posts: 18
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Not Ranked
.030 over 390
just a question....found the build sheet for my engine and said its .030 over. what does that mean for the ci size of my engine? not a lot of other info for internals. its a 390. is it a 427 or a 428 now? forgive me for my questions but just trying to learn about my car and you guys have forgotten more than i will know about cobras!
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09-01-2010, 08:18 PM
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CC Member
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Join Date: Aug 2010
Location: San Antonio Valley Ca,
ca
Cobra Make, Engine:
Posts: 1,275
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Not Ranked
Quote:
Originally Posted by seeda
just a question....found the build sheet for my engine and said its .030 over. what does that mean for the ci size of my engine? not a lot of other info for internals. its a 390. is it a 427 or a 428 now? forgive me for my questions but just trying to learn about my car and you guys have forgotten more than i will know about cobras!
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I forget the exact calculations but you picked up about 2 cubic inches. |
09-01-2010, 08:20 PM
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Senior Club Cobra Member
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Join Date: May 2001
Location: Florence,
AL
Cobra Make, Engine: RCR GT 40 & 1966 Fairlane 390 5 speed
Posts: 4,511
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Not Ranked
if I calculated correctly you have a 395.359 ci FE.
http://www.avenger-valkyrie.org/tech...alculators.htm
a 390 has a 4.05 bore and a 3.78 stroke
a 428 has a 4.13 bore and a 3.98 stroke
a 427 has a 4.23 bore and a 3.78 stroke
Dwight
a good book on Ford motors
HIGH PERFORMANCE FORD ENGINE PARTS INTERCHANGE by George Reid
ISBN 1-884089-33-X
__________________
''Life's tough.....it's even tougher if you're stupid.'' ~ John Wayne
"Happiness Is A Belt-Fed Weapon"
life's goal should be; "to be smarter than inanimate objects"
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09-01-2010, 08:23 PM
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CC Member
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Join Date: Aug 2010
Location: San Antonio Valley Ca,
ca
Cobra Make, Engine:
Posts: 1,275
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Not Ranked
OK , so can about 2 be 5 and 5/16 ?
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09-01-2010, 10:07 PM
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Senior Club Cobra Member
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Join Date: Mar 2005
Location: Manchester,
NH
Cobra Make, Engine: AK1085 (302 Street), HTM111 (427 Comp), CSX2375R (289 Comp) and COB5999 (427 S/C)
Posts: 19,029
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Not Ranked
Isn't this now a 406?
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09-01-2010, 10:30 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
About 396 CU IN
__________________
Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way 
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09-01-2010, 11:25 PM
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Senior Club Cobra Member
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Join Date: Jul 2002
Cobra Make, Engine:
Posts: 15,712
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Not Ranked
396??? Oh, thats a bad number, sounds to "GM" for my liking. Lets call it a 406, yeah, much better. |
09-02-2010, 07:32 AM
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Senior Club Cobra Member
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Join Date: May 2001
Location: Florence,
AL
Cobra Make, Engine: RCR GT 40 & 1966 Fairlane 390 5 speed
Posts: 4,511
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Not Ranked
406
a 406 has a 4.13" bore and a 3.78" stroke
Dwight
__________________
''Life's tough.....it's even tougher if you're stupid.'' ~ John Wayne
"Happiness Is A Belt-Fed Weapon"
life's goal should be; "to be smarter than inanimate objects"
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09-02-2010, 08:10 AM
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CC Member
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Join Date: Aug 2010
Location: San Antonio Valley Ca,
ca
Cobra Make, Engine:
Posts: 1,275
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Not Ranked
Quote:
Originally Posted by Excaliber
396??? Oh, thats a bad number, sounds to "GM" for my liking. Lets call it a 406, yeah, much better. |
Call it what it is,,,, a 390 bored .030 oversized. Nothing more than a clean up bore. |
09-02-2010, 08:57 AM
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Senior Club Cobra Member
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Join Date: Jul 2002
Cobra Make, Engine:
Posts: 15,712
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Not Ranked
Quote:
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a 406 has a 4.13" bore and a 3.78" stroke
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Eh, close enough, what the heck, let's call it a 427, no one is going to whip out the micrometers at the local cruise in. |
09-02-2010, 09:44 AM
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CC Member
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Join Date: May 2008
Location: Sacramento,Ca.,
Ca.
Cobra Make, Engine: Midstates (2001)
Posts: 1,724
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Not Ranked
Im with redmt........call it what it is........030 390 or one mean FE.......
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