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Thread: DISPLACEMENT OF A ROOTS BLOWER

  1. 28th September 2011, 04:12 PM #1
    Bigbjorn
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    DISPLACEMENT OF A ROOTS BLOWER

    Does anyone in the readership know how much air is displaced per revolution by the Roots blower on a Detroit Diesel 4-71 two stroke engine? Failing this direct knowledge, does anyone know how to calculate this figure?
    URSUSMAJOR
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  2. 28th September 2011, 04:33 PM #2
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    WilkoP38A
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    Hi

    Wiki have a lot of info on it. Not sure if it answers your question though.

    Cheers
    Rob

    This is the link off my iPhone which goes to the mobile enabled site.


    Roots-type supercharger - Wikipedia, the free encyclopedia
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  3. 28th September 2011, 04:49 PM #3
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    awabbit6
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    According to this website Ford Flathead - Blowers Superchargers GMC 3-71 4-71 6-71 blown flatheads

    280 cubic inches per revolution.
    -- Paul --


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  4. 28th September 2011, 07:30 PM #4
    Bigbjorn
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    Quote Originally Posted by WilkoP38A View Post
    Hi

    Wiki have a lot of info on it. Not sure if it answers your question though.

    Cheers
    Rob

    This is the link off my iPhone which goes to the mobile enabled site.


    Roots-type supercharger - Wikipedia, the free encyclopedia
    Thanks for trying. No help or information at all. Only general knowledge that any reasonably informed person would know.
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  5. 28th September 2011, 07:32 PM #5
    Bigbjorn
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    Quote Originally Posted by awabbit6 View Post
    According to this website Ford Flathead - Blowers Superchargers GMC 3-71 4-71 6-71 blown flatheads

    280 cubic inches per revolution.
    This site is blocked. Said to be a phishing site.
    URSUSMAJOR
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  6. 28th September 2011, 08:29 PM #6
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    awabbit6
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    Quote Originally Posted by Brian Hjelm View Post
    This site is blocked. Said to be a phishing site.
    Here is the page as a pdf.
    Attached Files Attached Files
    -- Paul --


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  7. 28th September 2011, 09:24 PM #7
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    roversmith
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    Brian, if you ring Bob fisher automotive on 03 97435041 Im sure he would be able to help you. Say Greg from Horsham gave you his number.
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  8. 29th September 2011, 06:22 AM #8
    Bigbjorn
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    Thanks, folks. Got the info now. Doing some initial planning to blow a Chrysler 265 Hemi Six at about 8-10 lbs over atmospheric for a street rod.
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  9. 9th November 2011, 08:17 PM #9
    Stuck
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    Quote Originally Posted by Brian Hjelm View Post
    Thanks, folks. Got the info now. Doing some initial planning to blow a Chrysler 265 Hemi Six at about 8-10 lbs over atmospheric for a street rod.
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  10. 9th November 2011, 08:48 PM #10
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    Quote Originally Posted by Brian Hjelm View Post
    Don't be fooled into thinking supercharging is just a matter of squeezing a blower and belts in between the air intake and ports. It is a very complex and frustrating business, take it from me. I suggest you get a text book quality manual and read and absorb thoroughly before starting. If you are going to use boost levels much above 6-8 psi over atmospheric, then you are in for an interesting ride both in the car and on the tools.
    ..
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