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Thread: Tune Up advice 8:71 Birdcatcher & Mech Alk Inj, 110 PU

  1. #1

    Tune Up advice 8:71 Birdcatcher & Mech Alk Inj, 110 PU

    This is my first experience with a blown alky engine. I have a 540 ci BBC Merlin three block with Big B. 3 Heads, 8:71 Hampton supercharger, Enderlie 110 Mechanical pump, Bird catcher, with only hat nozzles, Debating on the port. It's at 50 % overdriven and I don;t know much about the rest of the engine. It was an engine I purchased from Bowers in Co. It didn't have the rods, crank, or pistons I paid for, as well a host of other things. I saw that when I pulled the pan. The theif sent me Scat rods & Crank and pistons. instead of the Callies Crank, Manley Rods and Airies pistons he was paid for. BACK TO TUNE UP Compression ratio, Cam and Head details ?????Yhr engine required that I swap 4 and 7 plug wires to run. It sounds crisp, and strong but It is so rich. Where do I start?

  2. #2
    Senior Member RACING JUNKIE
    Join Date
    Nov 2004
    Location
    St. Louis, Missouri
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    664
    What size are your jets? Are you running alcohol or fuel? I run a similar application and the jet in the barrell valve is 110 on alcohol.

    Bird or buzzard catcher?


    Do you feed fuel at the catcher and in the intake or just at the catcher?

  3. #3
    Senior Member RACING JUNKIE
    Join Date
    Jan 2006
    Location
    La.
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    2,890

    Re: Tune Up advice 8:71 Birdcatcher & Mech Alk Inj, 11

    Quote Originally Posted by sprizefighter
    This is my first experience with a blown alky engine. I have a 540 ci BBC Merlin three block with Big B. 3 Heads, 8:71 Hampton supercharger, Enderlie 110 Mechanical pump, Bird catcher, with only hat nozzles, Debating on the port. It's at 50 % overdriven and I don;t know much about the rest of the engine. It was an engine I purchased from Bowers in Co. It didn't have the rods, crank, or pistons I paid for, as well a host of other things. I saw that when I pulled the pan. The theif sent me Scat rods & Crank and pistons. instead of the Callies Crank, Manley Rods and Airies pistons he was paid for. BACK TO TUNE UP Compression ratio, Cam and Head details ?????Yhr engine required that I swap 4 and 7 plug wires to run. It sounds crisp, and strong but It is so rich. Where do I start?
    Port nozzles are the only way run, there's no way you can get equal distribution running thru the hat only and you will burn a piston eventually and even if you don't you will never achive the best performance running only thru the hat.

    not just my opinion FACT

    Zip.

  4. #4
    Senior Member SENIOR BUILDER
    Join Date
    Feb 2005
    Posts
    121
    +50% overdriven that thing is gonna blow!


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