Another what carb should I get question
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Another what carb should I get question

  1. #1
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    Default Another what carb should I get question

    So I am going to just buy a new carb for my project instead of trying to rebuild an underpowered carb thats been sitting in the environment for 10 years. I know i want a 750 DP and I see a lot of post about the holley 3310 and the 4150. But when I ggoogle those numbers I get a lot of variations. Is there a specific model number for marine applications? The boat has a 455 olds with a torker intake, not sure about the internals. Sorry for the rookie question.

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    Senior Member Hass828's Avatar
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    Call Duane @ Hi-Tech, he will sell you exactly what you need and answer any questions you might have.
    Hi-Tech Performance : Home Page
    "if we keep doing it the same way we always do..we will always get the same results"
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    Urban Cougar Trapper Gopher711's Avatar
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    Duane can hook you up if it's a stock motor , if you plan on doing any performance mods then you might look into a custom tuned carb for your application like one from Mark Sullens , or DaVinci and a few others
    http://oathkeepers.org
    Due to the fact that GOD limited mans intelligence , it's unfortunate he did not also limit his Stupidity !!!

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    Senior Member DuaneHTP's Avatar
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    Just to clear things up a bit in the above post; besides being a warehouse distributor for Holley Carburetors and Holley Performance Products, we also sell and do a lot of work with Gary Williams Custom Works Carburetors for the professional racer..

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    Senior Member 74glencoe's Avatar
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    I am defiantly not a carb guru but something a lot of people don't take into account when selecting a carb is altitude. From whoever you buy a carb make sure they know your intended boating altitude.

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    Great thanks for the info. I'm am I'm so cal and most of my trips will be to the river or local lakes. I'm not looking for a racing carb just something reliable. I will consider remanufactured if it's from a reputable builder.

    I might be getting ahead of myself because there's a milkshake in the oil pan. I think I'm gonna need and engine builder to go through this thing. Any recommendations in the so cal area?

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    Senior Member 74glencoe's Avatar
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    On the milkshake:

    If you have over transom headers that are cooled by water injection be sure that they don't have too much water on them. Any water sitting in the headers while at low rpm can be sucked back into the cylinder and make its way to the pan, and it does not take much water to milkshake your oil. Look up reversion in the jet or v drive section, others can explain it better.

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    Senior Member Schiada 201's Avatar
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    Call AED tell them what you need, they provide a great carb. Getting the right air bleeds are necessary .

  11. #9
    Some guy obnoxious001's Avatar
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    Quote Originally Posted by jb1314 View Post
    So I am going to just buy a new carb for my project instead of trying to rebuild an underpowered carb thats been sitting in the environment for 10 years. I know i want a 750 DP and I see a lot of post about the holley 3310 and the 4150. But when I ggoogle those numbers I get a lot of variations. Is there a specific model number for marine applications? The boat has a 455 olds with a torker intake, not sure about the internals. Sorry for the rookie question.
    You've mentioned a 3310, which is actually not a double pumper carb, but probably well suited to your Olds. The 3310 Holley is a 750 vacuum secondary carb, and there have been variations over the years.

    The "4150" that you mentioned is simply the style of carb, which would be a "double pump" carb, , while the 3310 carb is a 4160 style.

    Like you said, figure out your milkshake issue first, but a 3310 vacuum secondary carb might be a wise selection for your Olds. It may give you better fuel economy than a 750 double pump, and I would guess you won't be racing many guys with a mild Olds, and RPM level will be reasonably low.

  12. #10
    Cocoloco cocoloco's Avatar
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    Default Obnoxious is right on...

    Quote Originally Posted by obnoxious001 View Post
    You've mentioned a 3310, which is actually not a double pumper carb, but probably well suited to your Olds. The 3310 Holley is a 750 vacuum secondary carb, and there have been variations over the years.

    The "4150" that you mentioned is simply the style of carb, which would be a "double pump" carb, , while the 3310 carb is a 4160 style.

    Like you said, figure out your milkshake issue first, but a 3310 vacuum secondary carb might be a wise selection for your Olds. It may give you better fuel economy than a 750 double pump, and I would guess you won't be racing many guys with a mild Olds, and RPM level will be reasonably low.
    A 3310 Vac Secondary is the best for your Olds. I tuned Holleys for lots of applications over the years. A jet and an olds will work best with a VAC secondary. They make a kit with different opening rate springs for the 3310, get it. I learned with jets over the years you can play driveway dyno or go to the dyno all you want. Until you put the boat in the water, with a tune up, and start mashing the throttle open you aren't going to get the secondary opening right. The weight of the boat, the hull drag and any number of things can change your boats opening as compared to a guy with a boat having basically the same numbers. Start changing springs, have a buddy watch the vac rod on the housing, see when it opens, he says now and you are watching the tach or speedo. The boat will tell you when it likes it. It will bog or reach for fuel, you will know. You will find the right spring in twenty or thirty minutes. You can use a vacuum gauge if you want to establish base line numbers first. ONE MAJOR THING YET. Use the Holley calculator for size of the carb. It is so right on its magic. Be real about the RPM you will normally use. Will you be racing and dragging 5,000 out of "Onry Olds" or will you be cruising and pulling a Big Bertha out of the water at 4,500? Be realistic, you will use less fuel and have a way more responsive boat. Oldsmobiles were perfectly suited for jets, they will pull stumps and make max use of a stock jets efficiency. They weren't meant for racing. I know, some guys raced them, forgive me, but I can't recall my 454 being beat by an Olds, EVER! (I'll take even money the 3310 out the box has the right spring it.)

  13. #11
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    Default Carb&Scoop

    $200 SHIPPED Bolt it on!!
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  14. #12
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    Nothing less than a Holley 800-850 dp. It has two metering blocks for easier jet changes, external fuel bowl level adjustments and won`t have an experimental vacuum secondary.

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