UEGO and alcohol

[Jeff Bromberger]

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
>


----------------------------------------------------------------------------
To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org