UEGO and alcohol

Bruce Plecan nacelp at bright.net
Mon Sep 25 04:37:28 GMT 2000


If your that close you've done your homework,
what I'd do for in car monitoring is EGT, or WB.
Just so you have a reference, and the driver can kill things if temps or O2
volts go to dodo,
Bruce


> Yeah, maybe the o2 sensor is out of the question. The car is already
running
> and working fine w/175hp of NOS. We are jetted overly rich and have the
alky
> fuel pressure set higher than suggested (NOS has tables for alky foggers.
> They say that 175hp is 28 NOS, 38 fuel w/6psi of pressure. We're running
> 28/40 and 6.5psi of pressure). The plugs look great. The alky runs make
them
> look like new. I was just hoping to be able to do some fine tuning with an
> o2. Doesn't look like that's real do-able though... thanks for the input.
>
> jeff
>
> >
> > That is gonna be the biggest handful to get right, that you can imagine,
> IMO
> > The ports need to be rather large to allow any air into the motor you
got
> so
> > much fuel displacing the volume of air that engine can even see.
> > You can use a WB to monitor where your at after tuning, that is a Plug
Cut
> > and read combo, IMO.
> > That, and reading the plugs is gonna give you lots of grief, unless you
> been
> > doing this before.
> > My suggestion is sneeking into this VERY slowly, I mean start with 25
HP,
> > and optimize each single step as you go.   Or use multi steps of adding
> the
> > NOS Fuel.
> > Chassis dyno isn't going to hold this stable long enough for the temps
to
> > stabile to make much sense of it all anyway.
> >
> >  First thing I'd do other then crossing my fingers is wire up a bunch of
> > EGTs.
> > Keep the temps low, and check the plugs very often looking for ANY
> > Detonation.
> > Just don't know how you can look for a *average* AFR that will make
sense
> > with 2 fuels.
> > Bruce
> >
>
>
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