[Question] Old School Gale Banks "Twin Turbo" set up
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Old School Gale Banks "Twin Turbo" set up

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    Member chuckski190's Avatar
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    Default Old School Gale Banks "Twin Turbo" set up

    Looking for information on my Gale Banks set up.

    First question: I have a Holley 850 double pumper. The primary side metering block doesn't have any jetting and I have 98's in the secondary. Is this a known good running set up? I have never seen a "no jet" set up.

    Second question: Is the 850 the way this set up controls "Boost"? Meaning smaller less air flow.

    I hope some of the old school guys know my answers.

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    gn7
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    Obnoxioius 001 to the white courtesy phone please.

    No jets in the secondaries? ahhhh I'm going with a big NO! Thats not known as a good running setup.



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    Quote Originally Posted by chuckski190 View Post
    Looking for information on my Gale Banks set up.

    First question: I have a Holley 850 double pumper. The primary side metering block doesn't have any jetting and I have 98's in the secondary. Is this a known good running set up? I have never seen a "no jet" set up.

    Second question: Is the 850 the way this set up controls "Boost"? Meaning smaller less air flow.

    I hope some of the old school guys know my answers.
    I run a Holley 850 center squirter, 82s in the pri. 6.5 power valve that is boost referenced and 92s in the secondary, no powervalve. CFM is not as important on a turbo application as the carb will flow more than what it is rated at. All Holley 4 bbls are rated at 1.5" of pressure drop, if the pressure drop is increased to say 3" the carb is flowing alot more, how much more? I don't know but there is a mathamatical formula to find out if you just need to know. IOW, pull hard enough on that 850 and you can get it to flow 1200-1400 cfm or more. Biggest downfall of turbo applications is poor fuel supply to the carb. You'll need big fuel lines, high flow fuel pump and a fuel bypass system. I use a #10 suction line to pump, #8 to the fuel log from pump and a #8 return to the bypass regulator that is mounted directly on the fuel tank.
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    senior member turbo wog's Avatar
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    Quote Originally Posted by 058 View Post
    I run a Holley 850 center squirter, 82s in the pri. 6.5 power valve that is boost referenced and 92s in the secondary, no powervalve. CFM is not as important on a turbo application as the carb will flow more than what it is rated at. All Holley 4 bbls are rated at 1.5" of pressure drop, if the pressure drop is increased to say 3" the carb is flowing alot more, how much more? I don't know but there is a mathamatical formula to find out if you just need to know. IOW, pull hard enough on that 850 and you can get it to flow 1200-1400 cfm or more. Biggest downfall of turbo applications is poor fuel supply to the carb. You'll need big fuel lines, high flow fuel pump and a fuel bypass system. I use a #10 suction line to pump, #8 to the fuel log from pump and a #8 return to the bypass regulator that is mounted directly on the fuel tank.
    FUEL SUPPLY IS THE IMPORTANT ISSUE. I DID THE TANK PICK-UPS, LINES ,PUMP , DRILLED BIGGER FOR ALCOHOL & BOOST REFFERENCED THE CARB. IT ALL HELPED A LITTLE .WHEN I PUT BIGGER NEEDLE & SEATS IN I HAD NO MORE LEAN PROBLEM. ...SOMETIMES ITS THE LITTLE THINGS

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    senior member turbo wog's Avatar
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    Quote Originally Posted by chuckski190 View Post
    Looking for information on my Gale Banks set up.

    First question: I have a Holley 850 double pumper. The primary side metering block doesn't have any jetting and I have 98's in the secondary. Is this a known good running set up? I have never seen a "no jet" set up.

    Second question: Is the 850 the way this set up controls "Boost"? Meaning smaller less air flow.

    I hope some of the old school guys know my answers.
    MY TURBO SET-UP AS I NOTED HAD A LEAN ISSUE, I RAN BOTH POWER VALVES, 89-91 PRIMARYS & 107-110 SECONDARYS. SO IF YOURS WAS REVERSED I COULD SEE HOW IT WOULD RUN FINE. FIGHTING TO GET THE FUEL NEEDING THE WAY BIGGER JETS. IN THE END I BOUGHT .200 MINI SKIRTED BANJOS & 12 hole e-85 INSERTS ......sh#t! thats what i did to the dominator.not sure if the 850 is the same. i did drill for alcohol & do all the stuff to the 850 ,just not the skirted banjos & inserts. call bob oliver at competition carb & he can send you the titanium #.150 needle & seats. 775-331-5609 . he is in sparks nev. you also can get them from blp in florida or braswells on th east coast i believe or kevin at csu in fallon ca 909-851-6955 . where are you located & are you up & running ?
    Last edited by turbo wog; 10-12-2012 at 01:46 AM.

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