Banks draw-thru turbo questions...........
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Banks draw-thru turbo questions...........

  1. #1
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    Default Banks draw-thru turbo questions...........

    I have seen some boats with the old Banks TT, single card systems. I have seen others with a dual carb setup. What was the size of the carb on the single carb models and what was the size on the dual carb models? I need some pictures of a dual and single carb box if anyone has any.

    There are also fittings on the bottom of the carb box for water/oil, I assume no one uses these fittings as it doesn't make sense.

    Any help would be appreciated...
    Thanks

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    Senior Member 67weiman's Avatar
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    Pm 79centurion, he has a single carb draw thru setup on his day cruiser.

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    I use an 850 on mine that I had the choke horn milled off. I also use the oil lines in the carb box. Making over 10lbs of boost and with the single carb and my O2 is showing no signs of being lean. I had the carb done by Walts Hot Boat way back when who I think had TBS do it. I had them do the boost referencing...works pretty well.

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    Default Thanks for the pics and recomendations

    Anyone have a picture of just the carb box? I was wanting physical size specs and a picture of a dual carb box if anyone has one....thanks!

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    Quote Originally Posted by onalky View Post
    I have seen some boats with the old Banks TT, single card systems. I have seen others with a dual carb setup. What was the size of the carb on the single carb models and what was the size on the dual carb models? I need some pictures of a dual and single carb box if anyone has any.

    There are also fittings on the bottom of the carb box for water/oil, I assume no one uses these fittings as it doesn't make sense.
    Any help would be appreciated...
    Thanks
    I use an old 850 center squirter, boost referenced pri. power valve only and run oil thru the base, single line in, Tee at the outlet and 1 line to each turbo. Carb CFM rating is not as important as a N/A deal as a carb can flow alot more than it's rated airflow. Holley 4V are rated at 1.5" of press. drop.
    Within the heart of every stray lies the singular desire to be loved. "Good grief you're an irritating blowhard...." [Tex 6/16/11]

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    Quote Originally Posted by onalky View Post
    Anyone have a picture of just the carb box? I was wanting physical size specs and a picture of a dual carb box if anyone has one....thanks!
    It will take me a few days, but I have one in storage.

  10. #8
    JWM
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    Back in the early 1980's I ran the engine shop at PFM. On the high boost 850 HP engines we used an 850 cfm Holley. It was top of the line for the day. Boost Referenced system we installed. Today I use either a 900 or 1000 cfm HP series Holley carb. Far better than the old 850 style carb.

    JW
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    Quote Originally Posted by JWM View Post
    Back in the early 1980's I ran the engine shop at PFM. On the high boost 850 HP engines we used an 850 cfm Holley. It was top of the line for the day. Boost Referenced system we installed. Today I use either a 900 or 1000 cfm HP series Holley carb. Far better than the old 850 style carb.
    JW
    What makes the newer HP series carbs better?
    Within the heart of every stray lies the singular desire to be loved. "Good grief you're an irritating blowhard...." [Tex 6/16/11]

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    senior member turbo wog's Avatar
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    Quote Originally Posted by onalky View Post
    I have seen some boats with the old Banks TT, single card systems. I have seen others with a dual carb setup. What was the size of the carb on the single carb models and what was the size on the dual carb models? I need some pictures of a dual and single carb box if anyone has any.

    There are also fittings on the bottom of the carb box for water/oil, I assume no one uses these fittings as it doesn't make sense.

    Any help would be appreciated...
    Thanks
    here is a old pic when mine was stock, 850 carb
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    Default Thanks, perfect.

    What size plumbing for all of the turbo, manifold, intercooler lines? -8 or -10?

    Quote Originally Posted by turbo wog View Post
    here is a old pic when mine was stock, 850 carb

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    Default Motor vent/vacuum for turbos

    With the 8-71 I use the evac kits for the headers to relieve the excess pressure out the valve covers from inside the motor. That way I can actually keep the dipstick in the engine and most of the oil at 8-12 lbs. what are you turbo guys using? I don't see and hints in any of the pictures. Vacuum pump perhaps?

    Thanks

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    My old boat. Used a Holley 850DP, boost ref.
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  16. #14
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    Default Wow!

    Thanks! Can't get a much better photo than that!

    Quote Originally Posted by n8dawg View Post
    My old boat. Used a Holley 850DP, boost ref.
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