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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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