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From: davew@shark.UUCP (Dave Williams)
Newsgroups: net.auto
Subject: Re: Superchargers
Message-ID: <1362@shark.UUCP>
Date: Mon, 29-Apr-85 14:40:44 EDT
Article-I.D.: shark.1362
Posted: Mon Apr 29 14:40:44 1985
Date-Received: Wed, 1-May-85 03:22:20 EDT
References: <337@ttidcb.UUCP> <1354@shark.UUCP> <916@ariel.UUCP>
Reply-To: davew@shark.UUCP (Dave Williams)
Organization: Tektronix, Inc., Engineering Computing Systems
Lines: 54
Summary: 

In article <916@ariel.UUCP> jlw@ariel.UUCP (J.WOOD) writes:
>A couple of problems with Dave Williams response.
>
>1. It's Rootes not roots for the positive pumping type of
>   supercharger as user in GMC 2-stroke cycle Deisels.
>   It was named for the inventor? or company in England
>   which first used it.  The Rootes group of Sunbeam fame
>   finally went out of business.  Well, becoming part of BL
>   is the same thing, isn't it?
>   BTW the bit in the 'Road Warrier' where Mad Max starts
>   his blower is a farce.  Without the blower running
>   no air gets through since its a positive displacement
>   pump.
>
>2. When blowing over pressure air through a carbutrator,
>   the entire carb \must/ be placed in a pressure box.
>   The venturi effect works on the fact that due to
>   Bernoulli pressure reduction gas is \pushed/ from
>   the float bowl into the venturi.  Therefore, the
>   pressure in the float bowl must be higher than in
>   the venturi.

 1. While I may be wrong on the spelling of Rootes, at least
    I spelled carburetor correctly. :-)
    I never mentioned 'Road Warrior' (again, note spelling),
    since I never saw it and could care less. You are correct
    in stating that Rootes type puffer can not be cut in and
    out at will as the tricotial impellers impede the flow
    air.

 2. Wrong Turbo Breath..... fuel is drawn from the float
    bowl to the venturi area due the pressure differential
    caused by the Bernoulli Effect. The pressure in the
    float bowl should be at the same pressure as the
    pressure ahead of the venturi. This can be done by
    pressurizing the carb. The carb can be modified without
    resorting to a pressure box around the carb. Examples
    of this would be the 1954 Kaiser Manhattan with a
    McCulloch supercharger mounted on its six cylinder
    engine. The Paxton units on late 50's Studebaker
    Golden Hawks and the 1957 Ford NASCAR engine using
    a Paxton unit. This will only work for moderate amounts
    boost (about 8 lbs. max.). The pressurized box is the
    better way to go.
-- 


                                    Dave Williams
                                    Tektronix, Inc.
                                    Engineering Computing Systems

    "The 6000 Family"
"The workstations that made
Wilsonville famous."