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W9 Best 4150 size carb? #3079754
09/22/22 07:41 PM
09/22/22 07:41 PM
Joined: May 2004
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Taxes & Virus's R-US, NY
Dragula Offline OP
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For a 440ci W9 small block that revs to around 7800, what size carb? I can tell you, its bigger than 950, but curious what others have run.


'70 Cuda,...605 Hemi Street Car (6.20 best pass, 1.33 60ft)
https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car)
https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car)
https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9)

'66 Barracuda AWB Stretched nose Blown 440 Car in build stage

'71 Duster Drag Car 400 Low Deck 512 best 6.002 at 115.44mph
https://www.youtube.com/watch?v=Znuo3jMUXTk
Re: W9 Best 4150 size carb? [Re: Dragula] #3079790
09/22/22 09:25 PM
09/22/22 09:25 PM
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Bend,OR USA
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Cab_Burge Offline
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Originally Posted by Dragula
For a 440ci W9 small block that revs to around 7800, what size carb? I can tell you, its bigger than 950, but curious what others have run.

Time for you to find out up wrench Enjoy up


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: W9 Best 4150 size carb? [Re: Dragula] #3079791
09/22/22 09:30 PM
09/22/22 09:30 PM
Joined: Jan 2003
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Tulsa OK
Bad340fish Offline
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I don't think i would run anything smaller than a dominator.


68 Barracuda Formula S 340
87 "Chrysler" Conquest
Re: W9 Best 4150 size carb? [Re: Bad340fish] #3079793
09/22/22 09:37 PM
09/22/22 09:37 PM
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PA.
pittsburghracer Offline
"Little"John
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My little 408 loves it’s 1000cfm carb but I only shift at 6700 rpm.


1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time




Re: W9 Best 4150 size carb? [Re: Dragula] #3079810
09/22/22 11:10 PM
09/22/22 11:10 PM
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Ambridge, Pa.
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rickraw Offline
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I use to run a 1050, turning 7000. Worked perfectly.

Re: W9 Best 4150 size carb? [Re: Dragula] #3079813
09/23/22 12:10 AM
09/23/22 12:10 AM
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Posts: 30,136
Oregon
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AndyF Offline
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Oregon
Originally Posted by Dragula
For a 440ci W9 small block that revs to around 7800, what size carb? I can tell you, its bigger than 950, but curious what others have run.


Do you know how much power it makes? If you know how much power then you can do a rough conversion to CFM.

Re: W9 Best 4150 size carb? [Re: AndyF] #3079826
09/23/22 05:19 AM
09/23/22 05:19 AM
Joined: May 2004
Posts: 12,055
Taxes & Virus's R-US, NY
Dragula Offline OP
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Dragula  Offline OP
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The power is deceiving as its all over the map right now....Tough to get a good idea of what its going to do.


'70 Cuda,...605 Hemi Street Car (6.20 best pass, 1.33 60ft)
https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car)
https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car)
https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9)

'66 Barracuda AWB Stretched nose Blown 440 Car in build stage

'71 Duster Drag Car 400 Low Deck 512 best 6.002 at 115.44mph
https://www.youtube.com/watch?v=Znuo3jMUXTk
Re: W9 Best 4150 size carb? [Re: Dragula] #3079844
09/23/22 07:10 AM
09/23/22 07:10 AM
Joined: Oct 2003
Posts: 11,395
W. Kentucky
justinp61 Offline
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On my 434 I run a BLP BX4 1.59" venturi 4150 main body that I sent to Dom, He added all BLP parts to it, according to BLP its 1050-1100 cfm. I'm only running Indy heads, no W9's.


IMG_4822.jpg
Re: W9 Best 4150 size carb? [Re: justinp61] #3079927
09/23/22 10:57 AM
09/23/22 10:57 AM
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Portage,michigan
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B3422W5 Online content
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Bigger the better.
Have yet to put a bigger carb on any smallblock I have ever had, and not picked up.


69 Dart GTS A4 Silver All steel, flat factory hood, 3350 race weight
418 BPE factory replacement headed stroker
Best so far, 10.68 at 124.48
1.44 best 60 foot.
6.76 at 101.63 best 1 /8

Re: W9 Best 4150 size carb? [Re: B3422W5] #3079950
09/23/22 12:11 PM
09/23/22 12:11 PM
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Lubbock,TX
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DavidDean Offline
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Lubbock,TX
Dominator from your favorite manufacture

Re: W9 Best 4150 size carb? [Re: Dragula] #3079953
09/23/22 12:14 PM
09/23/22 12:14 PM
Joined: Jan 2003
Posts: 18,708
Las Vegas
Al_Alguire Offline
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Las Vegas
We run a carb with a 2.45" throttle plate on the Vette with is a good amount smaller than your engine is. Bigger for all out race stuff is usually the better option. As for how big that depends on the combo and power. If I were "stuck"on a 4150 type carb I would look at the BLP stuff or get Em Garage twin blades. I run a twin blade on the B1


"I am not ashamed to confess I am ignorant of what I do not know."

"It's never wrong to do the right thing"
Re: W9 Best 4150 size carb? [Re: Al_Alguire] #3079956
09/23/22 12:17 PM
09/23/22 12:17 PM
Joined: May 2004
Posts: 12,055
Taxes & Virus's R-US, NY
Dragula Offline OP
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Dragula  Offline OP
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So it might not be too outlandish to try my 1250 Dominator on it....Maybe knock some of the squirterr out of it.


'70 Cuda,...605 Hemi Street Car (6.20 best pass, 1.33 60ft)
https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car)
https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car)
https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9)

'66 Barracuda AWB Stretched nose Blown 440 Car in build stage

'71 Duster Drag Car 400 Low Deck 512 best 6.002 at 115.44mph
https://www.youtube.com/watch?v=Znuo3jMUXTk
Re: W9 Best 4150 size carb? [Re: Dragula] #3079984
09/23/22 01:07 PM
09/23/22 01:07 PM
Joined: Oct 2003
Posts: 11,395
W. Kentucky
justinp61 Offline
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W. Kentucky
Originally Posted by Dragula
So it might not be too outlandish to try my 1250 Dominator on it....Maybe knock some of the squirterr out of it.


Does your intake have a dominator flange?

Re: W9 Best 4150 size carb? [Re: justinp61] #3079992
09/23/22 01:26 PM
09/23/22 01:26 PM
Joined: May 2004
Posts: 12,055
Taxes & Virus's R-US, NY
Dragula Offline OP
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Dragula  Offline OP
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No, his intake is 4150....I have a 2" and 1" tall 4500 adapters....


'70 Cuda,...605 Hemi Street Car (6.20 best pass, 1.33 60ft)
https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car)
https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car)
https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9)

'66 Barracuda AWB Stretched nose Blown 440 Car in build stage

'71 Duster Drag Car 400 Low Deck 512 best 6.002 at 115.44mph
https://www.youtube.com/watch?v=Znuo3jMUXTk
Re: W9 Best 4150 size carb? [Re: Dragula] #3079994
09/23/22 01:32 PM
09/23/22 01:32 PM
Joined: Oct 2003
Posts: 11,395
W. Kentucky
justinp61 Offline
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Originally Posted by Dragula
No, his intake is 4150....I have a 2" and 1" tall 4500 adapters....


When I built my 434 Brett told me that I needed a dominator, but my intake has a 4150 flange. He told me to run the 4150 and not a Dominator on an adapter.

Re: W9 Best 4150 size carb? [Re: justinp61] #3080050
09/23/22 03:45 PM
09/23/22 03:45 PM
Joined: Nov 2003
Posts: 1,214
Out of the State of Confusion
blue_stocker Offline
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Out of the State of Confusion
Here's a formula if you care to try the mathmatical way...

The formula for calculating how much CFM (cubic feet per minute) your engine requires is: CFM = Cubic Inches x RPM x Volumetric Efficiency ÷ 3456


OR


EngineRPM-CID-Chart-800.jpg
Last edited by blue_stocker; 09/23/22 03:49 PM.

I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them.
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Re: W9 Best 4150 size carb? [Re: justinp61] #3080073
09/23/22 05:04 PM
09/23/22 05:04 PM
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Bend,OR USA
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I've had several 4150 intakes changed over to 4500 bolt patterns to use Dominator carbs on up scope wrench


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: W9 Best 4150 size carb? [Re: blue_stocker] #3080082
09/23/22 05:54 PM
09/23/22 05:54 PM
Joined: Oct 2007
Posts: 4,014
New York
polyspheric Offline
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The N/A CFM calculator is accurate for a V8* (assuming a single plane manifold) in that it gives the result of the formula.
So, of course, that's true whether the manifold is "hood clearance" height, or tunnel ram, since no correction is made for plenum volume.
* For 1, 2, 3, 4, 5 or 6 cylinder engines the demand is slightly higher.

It also assumes that the 4 bbl. carburetor is designed to operate accurately with a working vacuum of 1.5 Hg" (1 & 2 bbl. are rated at 3.0 Hg"). A carburetor’s CFM rating is only accurate if your individual engine produces the rated vacuum with that carburetor. If not, the carburetor flows a different volume, and is therefore somewhat self-adjusting.
An engine will draw more CFM that its rating from a carburetor smaller than the traditional calculations (viz., a 440" V8 with a 500 AFB will not completely “run out of steam”), and less CFM than its rating from a carburetor larger than the traditional calculations (viz., a 1050 Holley on a 300" V8 will flow less than 1050 CFM).
If the carburetor's vacuum in service falls below 1.5 Hg. the booster and venturi system timing is disturbed, and the emulsion function (A:F curve with rising RPM) will change, generally becoming leaner.


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Re: W9 Best 4150 size carb? [Re: polyspheric] #3080369
09/24/22 08:31 PM
09/24/22 08:31 PM
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Posts: 2,287
PA
moparacer Offline
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Dominator.....

When I seen W9 and 4150 I was like, nope.


67 Barracuda street/bracket car 11.27-119
68 Dart 502 BB 8.70s-152
414 cid SB Dragster 7.65-174
Re: W9 Best 4150 size carb? [Re: Dragula] #3080662
09/25/22 08:47 PM
09/25/22 08:47 PM
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aZLiViN
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I’d try this…..

8591978D-506D-468F-B201-1534CFB9A8E9.jpeg
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