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02-24-2003, 07:17 PM
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CC Member
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Join Date: Dec 2002
Cobra Make, Engine: KMP
Posts: 790
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Not Ranked
One carb or two
With a 427 SO motor, which is the better carb set-up for the road, one carb or two?
Thanks,
Lew
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02-24-2003, 07:50 PM
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Senior Club Cobra Member
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Join Date: Nov 2001
Location: Kountze,
TX
Cobra Make, Engine: CMC, 351 Cleveland, Dual Quads, C6
Posts: 1,377
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Not Ranked
When you open the hood, two fours sure looks great! The only way to go! 
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David Shelton
Lone Star Gashole!
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02-24-2003, 09:13 PM
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CC Member
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Join Date: Aug 2002
Location: Uranus,
cal
Cobra Make, Engine: NAF replica, 351W, about 420 HP
Posts: 3,046
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Not Ranked
What is the correct CFM of each carburetor for streetability? Over-carbing is easy to do.
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Edley, The Cobra Rogue!
"If you think that you can cut it, if you think you got the time, you'll only get just one chance, better get it right first time. 'Cause in this game you're playing, if you lose you got to pay, and if you make just one wrong move, you'll get BLOWN AWAY. Expect no mercy.
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02-24-2003, 09:28 PM
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CC Member
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Join Date: Jun 1999
Location: Bay Area,
FL
Cobra Make, Engine: What Cobra?
Posts: 7,193
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It would all depend on whether you have a single or a dual carb manifold.
TURK
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OBAMA IN in 2012
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02-24-2003, 09:34 PM
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Senior Club Cobra Member
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Join Date: Mar 2001
Location: Seattle, WA,
Posts: 1,389
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Got em, Love em.
But......................they are a little cranky....can be tough to get out the flat spots..............they will try to run rich at idle ,lean at speed.
And finding a real set of balanced vaccuum secondary 2x4 550 cfm carbs is not easy or cheap.
600 cfm's will work with the right jetting ,secondarys and linkage.
Some people run bigger , but they are probabley stroked engines and aggresive cams.
but when they are right they are Visious
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Foolish consistancy is the hobgoblin of tiny minds
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02-24-2003, 10:28 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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Open mouth, insert foot.......
Well as long as you went to all the trouble to stuff that monster motor in there, why stop with just one carb? Isn't a BB all about "looks" anyway? 
Uh oh,
Ernie |
02-24-2003, 10:33 PM
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Senior Club Cobra Member
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Join Date: Mar 2001
Location: Seattle, WA,
Posts: 1,389
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Ernie ,
YOU ..................are the Master baiter
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Foolish consistancy is the hobgoblin of tiny minds
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02-24-2003, 10:47 PM
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CC Member
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Join Date: Aug 2002
Location: Uranus,
cal
Cobra Make, Engine: NAF replica, 351W, about 420 HP
Posts: 3,046
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Not Ranked
Weber Injectors!!! With little red velocity stacks!!! Polished, even!!!
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Edley, The Cobra Rogue!
"If you think that you can cut it, if you think you got the time, you'll only get just one chance, better get it right first time. 'Cause in this game you're playing, if you lose you got to pay, and if you make just one wrong move, you'll get BLOWN AWAY. Expect no mercy.
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02-24-2003, 10:51 PM
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CC Member
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Join Date: Apr 2001
Location: San Diego,
CA
Cobra Make, Engine:
Posts: 1,112
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If you will do any track time, you will want a single four. They are not subject to fuel starvation under body lean, etc like two fours.
If you mean "for the road" is street use, its awful nice to have 2x4 setup and you will not be sorry with this setup.
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Bill Malone
Gashole
CSX4786
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02-25-2003, 02:17 AM
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CC Member
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Join Date: Aug 2000
Location: Chicago,
IL
Cobra Make, Engine: ERA 454 S.O.
Posts: 1,684
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One 4 barrel is much easier and will make as much power as two 4's.
All of the comp. and s/c cars had a single 4 barrel.
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Jeff
“If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough horsepower.”
Mark Donahue
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02-25-2003, 05:00 AM
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CC Member/Contributor
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Join Date: Feb 2000
Location: Greenville,
SC
Cobra Make, Engine: 70 Shelby convertible, ERA-289 FIA, 65 Sunbeam Tiger, mystery Ford powered 2dr convertible
Posts: 12,716
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Not Ranked
For street applications, twin 390cfm Holley carbs are what is suggested........
Bill S.
Quote:
Originally posted by Edley Rondinone
What is the correct CFM of each carburetor for streetability? Over-carbing is easy to do.
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Instead of being part of the problem, be part of a successful solution.
First time Cobra buyers-READ THIS
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02-25-2003, 08:25 AM
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CC Member
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Join Date: Jan 2001
Location: British Columbia, Canada,
Posts: 26
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I went from an Edelbrock Performer with a 750 Holley to a Blue Thunder with twin 600 Holleys. Runs much smoother with no hesitation. The trick is the right carbs with the right cam. I think Carlsfordparts still has a few correct sets. If you give Carl your engine specs, he'll help you out. Good Luck.
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02-25-2003, 12:58 PM
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The Royal Rhubarb
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Join Date: Sep 1999
Location: Tioga,
Tx
Cobra Make, Engine: ERA #495,427SO, Stroked
Posts: 973
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Not Ranked
2X4
Two 660's sure are nice!! 
The Royal Rhubarb 
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Life is GOOD!!
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02-25-2003, 01:09 PM
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CC Member
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Join Date: Apr 2001
Location: glendale, california,
Posts: 265
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have 2 600cfm holley's and blue thunder intake. Love the look of it, but performance wise can't tell you what to go with
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02-25-2003, 01:31 PM
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CC Member
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Join Date: Jan 2000
Location: Grapevine,
TX
Cobra Make, Engine: Former Owner/Builder of KMP142 427 Sideoiler, Tunnel Wedge, Aluminum heads, etc.
Posts: 702
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Not Ranked
Kirkham 427 S/C #142
Single 1965 dated Holley 788 cfm LeMans
Turkey Pan
Looks good,
Runs Good,
Is Good.
Accurate to Original
Going back to work now.
Bud  |
02-25-2003, 04:00 PM
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CC Member
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Join Date: Jul 2000
Location: Las Vegas,
NV
Cobra Make, Engine: 427 SC
Posts: 1,076
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Not Ranked
Jeff, not all S/C's came with a single 4bbl.
Quote:
Originally posted by Jeff Frigo
One 4 barrel is much easier and will make as much power as two 4's.
All of the comp. and s/c cars had a single 4 barrel.
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kris kincaid
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02-25-2003, 07:11 PM
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CC Member
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Join Date: Aug 2000
Location: Chicago,
IL
Cobra Make, Engine: ERA 454 S.O.
Posts: 1,684
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Not Ranked
Kris:
How many s/c cars came with two 4's?
__________________
Jeff
“If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough horsepower.”
Mark Donahue
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02-25-2003, 07:18 PM
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CC Member
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Join Date: Jul 2000
Location: Las Vegas,
NV
Cobra Make, Engine: 427 SC
Posts: 1,076
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Not Ranked
At least one, CSX3042:
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kris kincaid
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02-25-2003, 08:14 PM
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Senior Club Cobra Member
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Join Date: Mar 2001
Location: Seattle, WA,
Posts: 1,389
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Not Ranked
Kris,
That is exactly the picture ive been looking for!
I dont suppose you know if that 3 port fuel log was original?
Or why there is a banjo fit on the front carb?
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Foolish consistancy is the hobgoblin of tiny minds
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02-26-2003, 08:19 AM
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CC Member
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Join Date: Aug 2002
Location: Atlanta,
GA
Cobra Make, Engine: SPF #821,Southern Automotive 427 Side Oiler w/2x4
Posts: 687
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Not Ranked
Kris
If its not too much trouble can you take a close up of the linkage and post it? Same view but a close up of the linkage
Thanx
__________________
Alex
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