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Thread: Which Carb for my 350?
          
   
   

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  1. #1
    M22KLARS's Avatar
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    Which Carb for my 350?

     



    I'm trying to make more power this year and I basically know nothing about carbs... Can you help me? I have a Chev 350 with a Victor Jr intake manifold. What's next?
    1936 Plymouth 4 Door Custom Convertible

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    HOSS429's Avatar
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    my ford 351 loves its 750 cfm vacuum holley
    iv`e used up all my sick days at work .. can i call in dead ?

  3. #3
    M22KLARS's Avatar
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    I'm looking for links to exact carbs that I can buy online.

    On a side note... It's been in the 50's here in MN for the past few days so I fired up my Plymouth for the first time since fall. Now I'm all excited to get to work on her.
    1936 Plymouth 4 Door Custom Convertible

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    Dave Severson is offline CHR Member/Contributor Visit my Photo Gallery
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    What is the rest of the engine? Stock stuff or ?? Generally for street use with an automatic trans (I assume that's what you have) a plain old 600 vacuum secondary should do fine. Which exact number of carb depends on a lot of things, what the engine has in it for parts, type of transmission, etc. What carb do you have now? Generally speaking, just changing to a bigger carb isn't going to make the car faster....
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  5. #5
    M22KLARS's Avatar
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    Quote Originally Posted by Dave Severson View Post
    What is the rest of the engine? Stock stuff or ?? Generally for street use with an automatic trans (I assume that's what you have) a plain old 600 vacuum secondary should do fine. Which exact number of carb depends on a lot of things, what the engine has in it for parts, type of transmission, etc. What carb do you have now? Generally speaking, just changing to a bigger carb isn't going to make the car faster....
    Sorry... I'm new to this. It's a chev 350, 350 turbo trans, edelbrock victor jr intake, not sure what carb is on it now... mild cam... not sure on that either.. I'm terrible at this.

    Also I'm aware that just changing the carb isn't going to work miracles but combined with the victor jr and a cam it will certainly help.
    1936 Plymouth 4 Door Custom Convertible

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  6. #6
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    What Dave said - we need to know what else has been done to the engine. If it's stock, the Victor Jr will be a major disappointment as it's made for 3,500 - 8,000 RPM operating range and will be a big pig on a stocker.

    In the stock form, an Edelbrock Performer with a Q-Jet is tough to beat for idle to 5500 RPM. A performer RPM and a Q-Jet works very well with headers and Flowmasters and breaths well to 6500 RPM.

    http://www.summitracing.com/parts/EDL-2101/ Performer Manifold - $129.95
    Or
    http://www.summitracing.com/parts/EDL-7104/ Performer RPM - $179.95

    http://www.summitracing.com/parts/SUM-210200/ 750CFM Q-Jet w/electric choke - 269.95

    http://www.summitracing.com/parts/FEL-1205/ Gaskets - $15.95

    http://www.summitracing.com/parts/SUM-G1573HS/ Intake manifold bolts (sexy stainless!) - $8.95

    Don't forget a cool air cleaner!!

    Have Fun,
    Glenn
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  7. #7
    M22KLARS's Avatar
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    Quote Originally Posted by glennsexton View Post
    What Dave said - we need to know what else has been done to the engine. If it's stock, the Victor Jr will be a major disappointment as it's made for 3,500 - 8,000 RPM operating range and will be a big pig on a stocker.

    In the stock form, an Edelbrock Performer with a Q-Jet is tough to beat for idle to 5500 RPM. A performer RPM and a Q-Jet works very well with headers and Flowmasters and breaths well to 6500 RPM.

    http://www.summitracing.com/parts/EDL-2101/ Performer Manifold - $129.95
    Or
    http://www.summitracing.com/parts/EDL-7104/ Performer RPM - $179.95

    http://www.summitracing.com/parts/SUM-210200/ 750CFM Q-Jet w/electric choke - 269.95

    http://www.summitracing.com/parts/FEL-1205/ Gaskets - $15.95

    http://www.summitracing.com/parts/SUM-G1573HS/ Intake manifold bolts (sexy stainless!) - $8.95

    Don't forget a cool air cleaner!!

    Have Fun,
    Glenn
    Thank you! That is a good start. I will try to get some more info on my motor and such. I appreciate all the help. Again... I'm learning.
    1936 Plymouth 4 Door Custom Convertible

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  8. #8
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    Is this a daily driver ??? or a weekend warrior ???
    As has been said the Victor is way over the top for either really, Also you have to think about what your going to be using it for, power or economy, If it never see's any serious RPM you could use a smaller carb.
    Its aweful lonesome in the saddle since my horse died.

  9. #9
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    Quote Originally Posted by roadster32 View Post
    Is this a daily driver ??? or a weekend warrior ???
    As has been said the Victor is way over the top for either really, Also you have to think about what your going to be using it for, power or economy, If it never see's any serious RPM you could use a smaller carb.
    This car is a weekend warrior and I live way out in the country so I use it to run around town on nice days too.

    Thanks for the info.
    1936 Plymouth 4 Door Custom Convertible

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  10. #10
    IC2
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    Quote Originally Posted by M22KLARS View Post
    This car is a weekend warrior and I live way out in the country so I use it to run around town on nice days too.

    Thanks for the info.

    What he means about being a weekend warrior - do you race it? If it's a cruiser - that Victor, Jr needs to go and be replaced by a dual plane like an Edelbrock Performer and possibly even an Edelbrock #1406 600 CFM or Holley, possibly an 1850 (or whatever the latest p/n is). The Victor series is a WOT(wide open throttle) intake and used mostly to race
    Dave W
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  11. #11
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    Quote Originally Posted by IC2 View Post
    What he means about being a weekend warrior - do you race it? If it's a cruiser - that Victor, Jr needs to go and be replaced by a dual plane like an Edelbrock Performer and possibly even an Edelbrock #1406 600 CFM or Holley, possibly an 1850 (or whatever the latest p/n is). The Victor series is a WOT(wide open throttle) intake and used mostly to race
    HA! Thanks. I'm an idiot. No I don't race it. It's just something fun to drive on nice days.

    I realy appreciate all the feeback I've been getting!
    1936 Plymouth 4 Door Custom Convertible

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  12. #12
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    I agree with the dualplane manifold idea, but a Holley Street Avenger would be a good carb choice, in my opinion. The 570cfm version (0-80570) is good to about 5000 rpm. If you need more rpm, which is highly unlikely, the 670cfm version (0-08670) would be a good choice. I had a 600 Holley 1850 on a 350 sbc, replaced it with a Street Avenger and I got much better results.
    Hans
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  13. #13
    M22KLARS's Avatar
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    Quote Originally Posted by wingman9 View Post
    I agree with the dualplane manifold idea, but a Holley Street Avenger would be a good carb choice, in my opinion. The 570cfm version (0-80570) is good to about 5000 rpm. If you need more rpm, which is highly unlikely, the 670cfm version (0-08670) would be a good choice. I had a 600 Holley 1850 on a 350 sbc, replaced it with a Street Avenger and I got much better results.
    Thanks! I'll take the into consideration.
    1936 Plymouth 4 Door Custom Convertible

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  14. #14
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    As for the intake manifold, lots of fellows with street machines have chosen the Edelbrock Performer, part number 2101...This intake is rated by Edelbrock as being effective from idle to 5500 rpm's.
    http://www.summitracing.com/parts/EDL-2101/
    I disagree with this choice. This is a very low rise dual-plane intake and the only advantage I see to it is that it is aluminum, which takes some weight off the front of the vehicle as compared to a cast iron intake. It certainly is not a performance manifold in my opinion.

    Stepping up to a high-rise, dual-plane intake has shown to give an increase of 30-40 horsepower on my DynoSim software engine builds and this seems to be borne out by what I hear from racers at the drag strip and what I read on other forums. One such intake would be the Edelbrock Performer RPM, part number 7101....This intake is rated by Edelbrock as being effective from 1500 to 6500 rpm's.
    http://www.summitracing.com/parts/EDL-7101/
    You might say, well it doesn't become effective until 1500 rpm's as compared to the Performer, which Edelbrock says is effective from idle. Three things to be considered here....
    1. You don't use any power from idle to 1500 for any performance advantage purpose whatsoever. It's just a transition from idle to a useable rpm range.
    2. Most any enthusiast who does modifications to a motor will also change the torque converter to one that is a little looser and allows the motor to "come up on the cam". Most fellows will choose at least a 2000 rpm stall unit, which is well past the 1500 rpm starting range of the RPM intake.
    3. Don't worry about the high end of the range, the 6500. If you ever do get the motor to that point, it won't be for but an instant anyway. The RPM will do an exemplary job from 1500 to 5500 in a common sense street motor.

    Edelbrock also offers an "Air Gap" model in the RPM, rated at the same 1500 to 6500 rpm range as the standard 7101, but with an opening under the carb pad to supposedly cool the intake charge, making it more dense and therefore making more horsepower.
    http://www.summitracing.com/parts/EDL-7501/
    I don't know, this may or may not work. I do know one thing though, if I lived in an area where it got cold, I'd probably get tired of waiting for the motor to get warm so that it didn't stumble and according to David Vizard, there is only 3-5 hp difference anyway. The standard RPM would be my choice.

    Optionally, Weiand made a very nice dual-plane, high-rise intake called the Stealth, under part number, I think, 8016, but they are no longer available new, having been replaced by the Speed Warrior, part number 8150...
    http://www.summitracing.com/parts/WND-8150/

    Holley also made a nice manifold that is no longer available new, part number 300-36. There is a 300-36S model made now (Maybe the "S" stands for Street, I don't know for sure). If the runners are smaller/shorter or the carb base is lower, then I doubt it will perform like the original 300-36. Here's an original for sale on Racing Junk....
    http://www.racingjunk.com/category/0...or-300-36.html

    Scuttlebutt has it that an Airflow Research engineer has said that there is no better intake for a street or street/strip motor than the Edelbrock RPM. I can't attest to the truth or untruth of it, all I know is that if I were going to build a carbureted small block that would be rpm-limited to 6500, I would use an RPM or find a nice 300-36 like the one I linked on Racing Junk.

    And now viewers, for your edification and entertainment, here is a compilation of measurements that I stole from BeaterShark on the Corvette Action Center forum....

    "SBC aftermarket intake manifold heights. Hopefully this will be useful to someone.

    Here are some manifolds and their (advertised) heights I found when I was looking for a manifold to fit under my hood.

    DUAL-PLANE:
    Edel Performer (2101):
    Front: 3.50" Rear: 4.60"

    Performer Air Gap (2601):
    Front: 3.72", Rear: 4.92"

    Edel Performer RPM (7101):
    Front: 4.20", Rear: 5.25"

    Edel Performer RPM Air Gap (7501):
    Front: 4.20", Rear:5.25"

    Holley Street Dominator (300-36):
    front 4.44", rear 5.33"

    Weiand Stealth (8016):
    front: 4.18", rear: 4.50"

    Weiand Action Plus (8000):
    front: 3.75", rear: 4.63"

    Weiand Action Plus (8004):
    front: 3.50", rear: 4.00"


    SINGLE-PLANE:
    Edel Torker II (5001):
    Front: 3.53", Rear: 4.63"

    Edel Victor Jr (2975):
    4.58" (This is the height at the center of the carb pad and the carb pad is at a 3 degree angle down toward the front)

    Weiand Team G (7525):
    front: 3.50", rear: 4.50"

    Weiand Team G (7530):
    front: 3.63", rear: 4.56".

    Weiand X-celerator (7546):
    front: 4.38", rear: 5.31"

    Weiand X-celerator (7547):
    front: 3.09", rear: 4.06"



    I don't know what the stock manifold height is, but I'd bet it is real close to the Performer."
    Last edited by techinspector1; 02-18-2011 at 04:25 PM.

  15. #15
    NTFDAY's Avatar
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    You could also opt for an Offy 360 part# 6007,but they are a little pricey and IMHO the best after market intake manifold available.
    Ken Thomas
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