Fw: Supercharged 3800

[Strasser]

If you mount your S/C downstream of your TB,  it seems you will see little
top end gain unless you increase your TB size.  Once the pressure drop
across your TB reaches a maximum (in fluid dynamics terms, this is the point
of "choking" -- sonic flow of a gas), it can "flow" no more...no matter what
is pulling on the other side.  For example, in carbureted applications, the
installation of a roots type supercharger under the carb, requires
increasing size of carb.


Wayne Strasser
Chemical Engineer
EFI Patent Pending

-----Original Message-----
From: TBK <terryk at foothill.net>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Tuesday, April 28, 1998 9:23 PM
Subject: Re: Supercharged 3800


The Eaton M-62 is ~$1700US new $1300 rebuilt. M-90 a little higher. Contact
www.eaton.com

TK
-----Original Message-----
From: Peter Jaramaz <pjaramaz at ingenico.com.au>
To: 'DIY_EFI' <diy_efi at esl.eng.ohio-state.edu>
Date: Tuesday, April 28, 1998 4:27 PM
Subject: Supercharged 3800


>Hi all,
>
>Q regrading S/C 3800.
>
>In Aus thay're fitted in Holdens. Drove one on the weekend in a LWB luxo
barge Statesman and was extremely surprised by the grunt as well as the
linear power delivery.
>
>Now, wanted to force induct my own earlier 3800, questions I have is if I
mount the S/C between the engine and throttle body (with the MAP sensor on
the throttle body), can I get away with running a 1 bar/atmo MAP sensor as
the MAP would never see boost.
>
>My only concern is the MAP may be subject to too much vacuum under hi
rev/lo TPS.
>
>Would this cause a problem?
>
>Any comments suggestions?
>
>Anyone Stateside know the price of a factory S/C for a 3800 - a local
importer here has a new one but wants $1800. I can buy a brand new complete
engine from Holden for approx $5000, which makes the $1800 for a bare S/C
seem a little high :-(
>
>
>
>