Single or dual quads?
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Single or dual quads?

  1. #1
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    Default Single or dual quads?

    The 460 in my Jet boat is running a Tunnel Ram with a single 800 Holley carb.

    The previous owner included a section for the intake that will allow me to run dual quads.

    Other than looking badass is there any reason to run 2?

    I know more air/fuel means more power, but under normal usage will it make any difference poerformance, fuel economy, etc?


    Thanks in advance!

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    Senior Member jockorace's Avatar
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    Dual quad TR on a stock 460;

    1) You will look way cooler!

    2) You will burn more fuel.

    3) You may go slower.

    Jocko

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    uh oh... The popcorn is out.

    I know I can search other people's posts but often find their info doesn't really apply to my own situation.

    I had assumed that running two carbs would use more fuel so I believe I will just go with the one. I am not racing anyone but myself anyway. have a good day.


    Thank you!


    J

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    gn7
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    Quote Originally Posted by jockorace View Post
    Dual quad TR on a stock 460;

    1) You will look way cooler!

    2) You will burn more fuel.

    3) You may go slower.

    Jocko
    How do you burn more fuel at the same part throttle rpm if the air/fuel is correct??
    How do you burn more fuel at WOT and go slower if the air/fuel is correct.

    I have heard this multiple times from the dual 4bbl T ram experts, but never given a reasonable explaination how this happens.



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    Senior Member SHADOW 21's Avatar
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    Running a tunnel ram intake with the adapter and a single carb is not a good idea, it was never designed to be run that way, if you are going to run one carb. get a intake designed for that, or put 2 carbs on the tunnel ram.

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    I should have specified that I have the correct top portion of my intake for both single and dual quads.

    I have the single part on now, but have the dual quad upper to change out if I want.

    J

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    Also, I am not aware of anything that has been done to the lower end, but the previous owner told me the cam was significantly wilder than the previous one and that the heads had been worked over extensively, including being adapted for BBC roller rockers?

    I don't know how much difference any of that makes, but there it is. My friend that built the engine is going to look for the Cam Specs so I would know what I have.

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    Quote Originally Posted by gn7 View Post
    How do you burn more fuel at the same part throttle rpm if the air/fuel is correct??
    How do you burn more fuel at WOT and go slower if the air/fuel is correct.

    I have heard this multiple times from the dual 4bbl T ram experts, but never given a reasonable explaination how this happens.
    Your right, its a ratio and if set up properly it should be relatively the same. You might notice a slight increase in fuel consumption due an extra accelerator pump shot and if running two double pumpers its a lot of fuel on the hit.

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    Quote Originally Posted by SuperTiger77 View Post
    The 460 in my Jet boat is running a Tunnel Ram with a single 800 Holley carb.

    The previous owner included a section for the intake that will allow me to run dual quads.

    Other than looking badass is there any reason to run 2?

    I know more air/fuel means more power, but under normal usage will it make any difference poerformance, fuel economy, etc?


    Thanks in advance!
    other than lookin bad ass ,,what other reason do you need?? single on a t/r looks gay.(and doesn't work well) I love mine on a 460.just sayin

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    There is something to be said for looking Badass...

    What carbs are you running on your 460, how hot is the engine?

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    Quote Originally Posted by gn7 View Post
    How do you burn more fuel at the same part throttle rpm if the air/fuel is correct??
    How do you burn more fuel at WOT and go slower if the air/fuel is correct.

    I have heard this multiple times from the dual 4bbl T ram experts, but never given a reasonable explaination how this happens.
    Geez Bob, why you gotta take the fun out of every thread? First, I'm not an expert. Second, read what I posted........I never said anything remotely close to what you just typed. Third, I said you MAY go slower. Now you know as we'll as I that 90% of the lake TR setups are not running A/F correct. Thus, I stand by what I posted......you will burn more fuel and you MAY go slower.
    Jocko

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    Quote Originally Posted by jockorace View Post
    Geez Bob, why you gotta take the fun out of every thread? First, I'm not an expert. Second, read what I posted........I never said anything remotely close to what you just typed. Third, I said you MAY go slower. Now you know as we'll as I that 90% of the lake TR setups are not running A/F correct. Thus, I stand by what I posted......you will burn more fuel and you MAY go slower.
    Jocko
    is all about velocity port volume and fuel dropout if your not moving the air fast enough to hold the air fuel mixture in suspension your gonna run like crap if your engine is stock ish then don't throw a huge runner drag only tunnel ram on it go with a more appropriately sized manifold to match your combo its all about matching the parts you have

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    Ditch the 800 , go with 2 450s or 600's

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