What does stoich mean?

[Dave Zug]

Great info mark! thanks.

With some budget software dyno I should be able to accomplish just 
that. I have in mind to (given software dyno output is achievable) 
use software to look at previous run and compare to "this" run and 
spit out spark table correction suggestions. maybe even take several 
runs and do an average... all values that were increased last time, 
if they gain, will be increased. if they lose, they will be lowered 
and tagged as 'locked' in case the next pass suggests they need 
modified again. sorry my brain races. I know what I'm saying honest 
;-) call it a dyno / auto tuning aid.

> From:          "Mark Romans" <romans at pacbell.net>
> To:            <gmecm at efi332.eng.ohio-state.edu>
> Subject:       Re: What does stoich mean?
> Date:          Thu, 19 Aug 1999 21:21:51 -0700
> Reply-to:      gmecm at efi332.eng.ohio-state.edu

> I was just speaking to Steve Cole at TTS Power Systems and he was showing me
> the LBT spark map on the 99 LS1 engine in the 99 Vet.  He explained the GM
> puts 118 octane fuel in and then tests the engine at all load and rpm
> levels, putting in more advance until power drops off.  Mapping this gives
> you the point at which more spark does not add power.  So barring
> detonation, this is max advance that the engine can use.  This map is in the
> ecm as a reference barring detonation.
> Mark
> -----Original Message-----
> From: Dave Zug <dzug at delanet.com>
> To: gmecm at efi332.eng.ohio-state.edu <gmecm at efi332.eng.ohio-state.edu>
> Date: Thursday, August 19, 1999 10:01 AM
> Subject: Re: What does stoich mean?
> 
> 
> So if given a choice to either
> 
> a) increase spark asvance until (just before) detonation occurs
> 
> or
> 
> b) decrease fuel delivered until (just before) detonation occurs
> 
> economy minded people choose B and performance people choose A?
> 
> > From:          JTesta1966 at aol.com
> > Date:          Thu, 19 Aug 1999 12:17:01 EDT
> > Subject:       Re: What does stoich mean?
> > To:            gmecm at efi332.eng.ohio-state.edu
> > Reply-to:      gmecm at efi332.eng.ohio-state.edu
> 
> > In a message dated 8/19/99 11:42:21 AM Eastern Daylight Time,
> > dzug at delanet.com writes:
> >
> > << ..and for the record, I do NOT want to be running  450Mv at WOT,
> >  right? I want 0.890 (safe) to 0.850 (leaner than safe, but mo power
> >  here).. yes?
> >   >>
> >
> > You wanna be as lean as possible w/o detonation.....well..on a GN anyway.
> I
> > shoot for 790-820
> >
> > Jim
> >
> >
> ~~~
> Dave Z. www.delanet.com/~tgp
> 
> 
> 
> 
~~~
Dave Z. www.delanet.com/~tgp