Todd Francis
Precision Alloy LTD.
http://www.precisionalloy.com
----- Original Message -----
From: "Todd Francis" <tbf@pacifier.com>
To: "Marshall" <mjruskin@HOME.COM>
Sent: Friday, December 21, 2001 10:58 AM
Subject: Re: Re: Boston Bobs day at the dyno

> I have a friend that does a lot of work with CIS. He hasn't tried a
Vanagon
> yet but has thought about it. He just sent me some of his dyno data from a
> type 1 sand buggy he had his CIS on and he showed just over 100 hp with a
> 2110cc engine at the wheels. His site is at http://millerfi.com/   He has
> quite a bit of good info there.
> Todd Francis
> Precision Alloy LTD.
> http://www.precisionalloy.com
>
>
> ----- Original Message -----
> From: "Marshall" <mjruskin@HOME.COM>
> To: <vanagon@GERRY.VANAGON.COM>
> Sent: Thursday, December 20, 2001 8:15 PM
> Subject: Re: Boston Bobs day at the dyno
>
>
> > This is an interesting topic - how much headroom does DigiFant/DigiJet
> have
> > for performance increase?
> >
> > According to that Bosch book on fuel injection tuning - not much,
> especially
> > at higher RPM's. - plus, you'd have to recalibrate the AFM for the
> > additional airflow, too. Tricky.
> >
> > What does have TREMENDOUS headroom, though - is CIS.
> >
> > I cannot help but think that if one want's more HP from a 1.9 or a 2.1-
> the
> > thing to do is to incorporate a CIS system from another vehicle. Maybe
> even
> > add dual injectors or dynamic fuel pressure!
> >
> > Marshall Ruskin
> > 84 Westy, Winnipeg Canada
> >
> > ----- Original Message -----
> > From: "Chris Stann" <ChrisS@INFORMS.COM>
> > To: <vanagon@GERRY.VANAGON.COM>
> > Sent: Thursday, December 20, 2001 10:51 AM
> > Subject: Re: Boston Bobs day at the dyno
> >
> >
> > > I am attempting to apply some rational thinking to the lean-mixture
> > dilemma.
> > > Tell me what you think.
> > >
> > > It appears that the stock FI system was unable to compensate for the
> > > additional air flow.  It seems that the Air/Fuel system either maxed
out
> > or
> > > still thinks you are running same amount of air through the engine.
> > Several
> > > possibilities come to mind:  1)  The oxygen sensor is bad - not likely
> 2)
> > > The fuel injectors are unable to flow more fuel even with higher fuel
> > > pressures and/or 3) the AFM is either not perceiving the increase in
air
> > > flow above the factory requirements or is unable to relay this
> information
> > > to the injectors.
> > >
> > > Such issues are nothing new to the tuners, such as Bob.
> > >
> > > It seems that bolt-on modifications, such as ratio-rockers, would have
> > > limited effect if the above issues are not resolved.  I find this a
bit
> > > puzzling since some people did report power increases with just ratio
> > > rockers.  After all, we've all been told that the FI systems have some
> > > ability to compensate for air-flow changes.
> > >
> > > Chris,
> > >
> > > '85 Westy.
> >
> >
>