----- Original Message -----
From: "Dave Dahlgren" <ddahlgren@snet.net>
To: "landspeedracer" <landspeedracer@msn.com>
Sent: Thursday, April 25, 2002 5:25 AM
Subject: Re: To inject or not to inject...
> It is pretty quiet here this morning so...
> On the carbs and injection.. everyone get a reality grip..
> Stop and look at what cars and motorcycles are doing that run in pro
classes,
> not drag racing either, or classes where induction is legislated.
> Find me the carbs on an F1 car, IRL car a CART car etc...
> While you are at it look for the plenum too..
> No carbs no plenum no mechanical FI
> You can sell yourself into what you think is best but in the larger
picture of
> things LSR is pretty retro tech for the most part. The difference between
a sbc
> with 2 carbs or a flathead with mechanical FI is the same difference
between
> shoeing horses and launching the space shuttle...
> The real deal is EFI done properly with slide throttles or roller
throttles.
> Expensive and complex but has no compromises either. Good bottom end good
top
> end great transient response, where legal better systems also have
injector
> stacks that change length on the fly as well according to rpm and load..
>
> forward this to the list if you like..
> Dave Dahlgren
>
> landspeedracer wrote:
> >
> > Bill
> >
> > Now I don't know if I have this exactly right, but as I understand it
the
> > plenum helps to make things less chaotic. Among other things it dampens
the
> > reversion pulses. With eight equally sized runners right underneath the
> > eight venturies, I don't believe the mixture varies very much on a
tunnel
> > ram the way it does on a single four intake. And on a properly set up
carb
> > atomization is very good. The big advantage to MFI, to my way of
thinking,
> > is the size of the runners you can use. Just add the proper pump,
nozzles &
> > pill and viola you have an extremely powerful fuel system.
> >
> > JB
> > ----- Original Message -----
> > From: <ardunbill@webtv.net>
> > To: "landspeedracer" <landspeedracer@msn.com>;
<land-speed@autox.team.net>
> > Sent: Wednesday, April 24, 2002 8:22 AM
> > Subject: Re: To inject or not to inject...
> >
> > > John, with two four-barrel carbs feeding a big plenum from which eight
> > > cylinders are pulling air, you're bound to have chaotic airflows what
> > > with the pulling here and there plus the reversions from each intake
> > > port. Is this not bound to result in varying fuel/air mixtures in the
> > > cylinders, changing up and down the rpm scale? Bill
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