Re: highest compression on a cis e

["J Miller" <sjmill@erols.com>]

also havign the bigger crank lessign my top revs
just so you knwo
jonas
----- Original Message -----
From: "Dave Ewing" <rabbit16v@prodigy.net>
To: "Scirocco List" <Scirocco-l@scirocco.org>
Sent: Thursday, May 03, 2001 4:07 PM
Subject: Re: highest compression on a cis e


> This is rather moot, but a 2.1 WILL flow more air than a 1.8 or 2.0 since
> the pistons/stroke is more than stock it will suck more air into the
> combustion chamber.  Remember, I said moot since this is not going to
change
> the fuel supply much if any but since everyone is arguing about
it.........
> Plus, always keep in the back of your head that an engine is just a big
> compressor.  Get the air in, and get the air out!  Bigger displacement
calls
> for more air and fuel at lower RPMs, thus the low end torque that you gain
> from a larger motor.  Just so you all know!!
>
> Dave
>
> >
> > Agreed - when you increase the CR you're squeezing the air harder once
> > it's in the combustion chamber.  However, there will be no corresponding
> > increase in fueling as the volume of air that moved past the airflow
> > sensor plate would be the same as a low-compression 1.8/2.0.
> >
> > Now, when you're talking turbo/super charging, THEN you're squeezing
more
> > air INTO the combustion chamber, which will result in more fuel (as the
> > increased volume of air moves past the airflow sensor plate it will
result
> > in more fuel.)
> >
> > Drew
> >
> > On Thu, 3 May 2001, Dan Bubb wrote:
> >
> > > Absolute Bull. Increasing the compression ratio has nothing to do with
> > > mass air flow. How hard you squeeze what's in the combustion chamber
has
> > > nothing to do with how much air gets in in the first place. Total
> > > pressure drop across the intake system, valve size, lift and duration,
> > > engine displacement and intake air temperature will determine mass air
> > > flow. CR may have some secondary or tertiary effect that is just as
> > > likely to decrease mass flow as to increase it.  The amount of fuel
> > > required also will not change, except for the possibility of running a
> > > little richer to forstall the onset of detonation.
> > >
> > > Shawn Rader wrote:
> > > >
> > > Raising the compression has roughly the same effect as
> > > > increasing the engines displacement - it increases the amount of air
> your
> > > > engine flows.  With more air you can burn more fuel which means more
> power.
> > > > By raising the compression from 11:1 to 12:1 your engine is flowing
9%
> more
> > > > air at any given rpm- about the same as increasing you engine
> displacement
> > > > from 2.1L to 2.3L.
> > > >
> > > > -shawn
> > > > '81 S
> > > >
> > > > On Thu, 3 May 2001 08:35:05 -0400, J Miller wrote:
> > > >
> > > > >  i am courious what the highest compression rate that the cis e
> injection
> > > > on
> > > > >  a 1.8 16 could handle,
> > > > >  i know 11:1 works fine but what above 12:1
> > > > >  i need a car and i am just goign to slap the 2.1L in with the
stock
> EMS
> > > > and
> > > > >  a few other minor mods
> > > > >  Hey mr rust bucket i need an adjustable moduale
> > > > >  jonas miller
> > > > >  1976 2.0L 8v  scirocco   for sale
> > > > >  1987 soon to be a monster 2.1L
> > > > >  fzr 600 bleediun carbs
> > > > >
> > > > >
> > > > >
> > > > >  --
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> >
> > Drew MacPherson, Network Analyst, University of Guelph
> >
> > drew@dyermaker.cs.uoguelph.ca           |  visit the Massey-Harris page:
> > http://dyermaker.cs.uoguelph.ca/~drew   |  http://m-h.cs.uoguelph.ca
> >
> >
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