zrater

70% at wot is this correct for a 2002 z thats stock. one run said 70%
and the other said 75%. can you up the fuel by widing the pulse width more.
thanks

SmokingWS6

iTrader: (1)

what was your o2 voltages and injector pulsewidth at wot

zrater

02,s at about 870 and 880 mv at wot

SmokingWS6

iTrader: (1)

Sounds like your a/f is within range.

jimmyblue

iTrader: (11)

This could be totally normal for a short breathing
car, stock pretty much. At 5000RPM WOT I see
75%. Probably the main difference is the, umm,
"low restriction stock appearing cats" and some
modest intake improvements. I trap 1-2MPH higher
so not that much difference.

The O2 voltages are OK for stock log manifolds, by
my experience. Not that it's golden or anything. But
it may not need or want fattening, power is probably
going to come from improving airflow more than mixture
fiddling.

Unless you're ping limited by short fueling which I don't
see strong evidence for.

Command the PE (and/or open loop fuel air) and the
pulse width will follow. But where are you trying to
lead it?

bshell

iTrader: (24)

The best (and most satisfying) way to up pulse width / duty cycle is to start modding! 70-75% IDCs mean you have some room to play with until you need to upgrade.