Screw Blower on a BBC

Discussion in 'PSI Superchargers Tech Questions' started by Money Shot, Nov 29, 2009.

  1. Money Shot

    Money Shot Member

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    Has anyone ever ran a Screw on a BBC? Most of the folks I know run a Hemi.
     
    #1
    Money Shot, Nov 29, 2009
  2. JRB

    JRB Guest

    Quite a few. With success too. What do you want to know?
     
    #2
    JRB, Nov 29, 2009
  3. Will Hanna

    Will Hanna We put the 'inside' in Top Alcohol
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    Call Doucet

    Bill Doucet has quite a bit of experience with this combo and is our neck of the woods (Opelousas, La) He ran one for a while in his car and has helped Wesley Jones with his D blower and Brodix Big Chiefs. Jones has ran low 3.90s on many equations and has the potential to run .80s.

    However both have bought Hemis if that tells you anything too.
     
    #3
    Will Hanna, Nov 29, 2009
  4. Money Shot

    Money Shot Member

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    bbc

    Was wondering if the issue of 35+lbs of boost was wrecking havoc on the bottom ends?
     
    #4
    Money Shot, Nov 29, 2009
  5. Lonnie Houde

    Lonnie Houde Member

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    Yes. Scott Filkins ran a screw on his RFE headed, BBC with 48-50lbs at the top of second and high gear gear, with an older style new Century block. We never had any lower end issues. But, he did run a Bryant crank and GRP and MGP rods. Ran for 4 seasons with the screw on it. Car was 2720lbs and ran low 6.0's and a best of 5.96 @ 244. Car would eight mile high 3.80's at 192-194mph.
    IMHO, you just need to be up on dropping the pan when you lean on it.
     
    #5
    Lonnie Houde, Nov 30, 2009
  6. Andy C

    Andy C Member

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    Bbc

    BBC 526 with no problems...6.70 at 3210lbs...
    Lonnie Houde did our fuel system...
    Its all in the tune up...
     
    #6
    Andy C, Nov 30, 2009
  7. Money Shot

    Money Shot Member

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    Good Info

    Thanks. I think Ill try the screw out on my BBC before I get all sappy about buying a Hemi. I did buy a good crank, rods and pistons this time so we will see what happens.

    Randy
     
    #7
    Money Shot, Nov 30, 2009
  8. Money Shot

    Money Shot Member

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    Damn.....3.80's at 2700lbs with a BBC. Thats impressive.
     
    #8
    Money Shot, Nov 30, 2009
  9. Money Shot

    Money Shot Member

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    One more question while Im at it

    Is it necessary to have the pie opening in the center of the intake for a screw? It works great for my roots. Ive never even seen the bottom of a screw blower so I have no idea.
     
    #9
    Money Shot, Nov 30, 2009
  10. Lonnie Houde

    Lonnie Houde Member

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    Different guys have a lot of different variations of how their distribution plate is cut out. I would just leave the stock distribution holes and run it. Just be careful on your compression. Aim for 10.1 even, and you shouldn't have any problems.
     
    #10
    Lonnie Houde, Nov 30, 2009
  11. Lonnie Houde

    Lonnie Houde Member

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    And Yes. That combo ran very well.
     
    #11
    Lonnie Houde, Nov 30, 2009
  12. Danny Humphreys

    Danny Humphreys Member

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    What block are you running?
     
    #12
    Danny Humphreys, Nov 30, 2009
  13. BUTCH

    BUTCH Member

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    206D on a BBC

    We are running the New Centrey 10,200 blocks, and have for the last 4 years with the screw blower, and up to 50 psi boast, No failures, for a cast block I do not think there is any better. Lowell is a dam good guy to deal with, 618 466 6383 . Just my 2 cents. Butch
     
    #13
    BUTCH, Dec 1, 2009
  14. Danny Humphreys

    Danny Humphreys Member

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    The only blocks I would use are new century, kb olds, or dart iron block. BTDT
     
    #14
    Danny Humphreys, Dec 1, 2009

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