Aerochargers are better than a twin screw!! hahaha ;-)

[Jeff Meager]

And what about the losses that a turbo causes due to the horendous
backpressures.....  you're not going to tell me turbo's are free horsepower
are you???  The T88 on the 2.2L nissan engine I worked on that's putting out
732hp at the wheels doesn't suffer the backpressure fate, but it also is not
making any real boost until 5500rpm.....

But a turbo that is on boost at 15psi, has on average, twice the exhaust
backpressure, than boost pressure....

LJ

-----Original Message-----
From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
Behalf Of Jess Gypin
Sent: Saturday, 20 October 2001 9:52 AM
To: diy_efi at diy-efi.org
Subject: Re: Aerochargers are better than a twin screw!! hahaha ;-)


And suck 10-15 hp from the engine in parasitic loss to drive the blower.

Jess
----- Original Message -----
From: "Stephen Andersen" <SAndersen at advan-tek.com>
To: <diy_efi at diy-efi.org>
Sent: Sunday, October 14, 2001 18:31 PM
Subject: RE: Aerochargers are better than a twin screw!! hahaha ;-)


> The boost curve for the Positive Displacement SC
> on aerocharger's web site is about as far from a
> "fact" as you can get.  When sized and "geared"
> properly for a give displacement engine, a PD
> supercharger will provide within about 10-15% of
> peak boost given WOT at somewhere just off idle.
>
> The twin screw compressors have extremely high
> volumetric efficiencies and don't need to be spinning
> very fast to generate boost.
>
> Aerocharger's site indicates that the boost curve
> is linear and starts at or near zero.  Way off base...
>
> Steve
>
> Stephen M. Andersen, P.E.                              (302) 326-6405
> Technical Director                                    FAX  (302) 326-6401
> AdvanTek International, LLC                     Cell   (302) 547-9842
> 56 Read's Way                               andersen at Advan-Tek.com
> New Castle, DE 19720
>
>
> > -----Original Message-----
> > From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
> > Behalf Of Greg Hermann
> > Sent: Sunday, October 14, 2001 8:36 PM
> > To: diy_efi at diy-efi.org
> > Subject: Re: Aerochargers are better than a twin screw!! hahaha ;-)
> >
> >
> > At 7:15 PM 10/13/01, Nicholas Parker wrote:
> > > What a load of crap at http://www.aerocharger.com/tech1.htm
> > >My little ol' 1600cc  MR2 with its cruddy 'two-lobe' Rootes
> > SC makes 10psi
> > >at 3000revs when max is only around 11.5 (by drive
> > ratio...),  even the
> > >turbo boost curve is not very fair to turbo-heads!!  Who
> > ever drew those
> > >graphs has probably got holes drilled through his SC lobes
> > and in hs turbo
> > >compressor housing!!
> > >Nick.
> >
> > Whatever makes you happy. Don't let facts confuse you!
> >
> > Greg
> >
> >
> > --------------------------------------------------------------
> > --------------
> > To unsubscribe from diy_efi, send "unsubscribe diy_efi"
> > (without the quotes)
> > in the body of a message (not the subject) to
> > majordomo at lists.diy-efi.org
> >
> --------------------------------------------------------------------------
--
> To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the
quotes)
> in the body of a message (not the subject) to majordomo at lists.diy-efi.org
>
>

----------------------------------------------------------------------------
To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org

----------------------------------------------------------------------------
To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org