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

[Stephen Andersen]

Don't misread my comments here, I am not at all
bashing turbos.  My two cars previous to my current
one were turbocharged.

I was/am merely stating that aerocharger's information,
and those here that believe it, which indicated that 
a PD supercharger had a boost curve anything like the
one on their web site was patently false...

I am still in serious internal debate over whether I
should turbo my car, or put a Whipple twin screw on it.

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 Bruce
> Sent: Thursday, October 14, 1999 9:03 PM
> To: diy_efi at diy-efi.org
> Subject: Re: Aerochargers are better than a twin screw!! hahaha ;-)
> 
> 
> 
> Worked on a turbo application that made peak boost at 900 RPM, and
> maintained it to redline.   Also, would work at peak boost 
> for hours atta
> time.
> Bruce
> 
> 
> 
> ----- Original Message -----
> From: "Jeff Meager" <jmeager at bigpond.com>
> To: <diy_efi at diy-efi.org>
> Sent: Sunday, October 14, 2001 8:59 PM
> Subject: RE: Aerochargers are better than a twin screw!! hahaha ;-)
> 
> 
> > I've helped out on a car with a Whipple twin screw SC, it 
> makes 15psi at
> > 1500rpm, and will hold it all the way from there to redline....
> >
> > Jeff
> >
> > -----Original Message-----
> > From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
> > Behalf Of Stephen Andersen
> > Sent: Monday, 15 October 2001 8:31 AM
> > To: 'diy_efi at diy-efi.org'
> > 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
> > >
> > >
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> > >
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