What is the base idle AFR Calum uses

gizzmo5580 · 03-14-2006, 08:53 PM

For initial tuning purposes with a wideband, what should the AFR be at about 1000 rpm and 0% throttle.

MarcTheNarc · 03-14-2006, 10:52 PM

Mine usually reads ~20.x on my Zeitronix wideband.

exxd · 03-14-2006, 10:59 PM

idle? 14.7:1

93viewside240sx.... 20:1afr? Does your idle lope?

MarcTheNarc · 03-15-2006, 12:12 AM

nope, my idle is fine

exxd · 03-15-2006, 12:17 AM

So you idle at 20:1afr and the idle is fine? Is the wideband calibrated?

MarcTheNarc · 03-15-2006, 12:24 PM

Its brand new, just installed it last weekend.

FWIW, I only have the upper part of my Protech downpipe installed right now, the J-pipe. This places the O2 sensor pretty damn close to the end of the exhaust, about 6" from the open atmosphere. I'm thinking that's why its reading like that. As soon as I hit the gas it drops down to where it should be. I haven't driven it since the wideband was installed, I simply installed it, started the car, gave it a couple revs to make sure the EGT and everything was working properly, and then shut it off.

exxd · 03-15-2006, 03:45 PM

Ah ok that makes a little more sense.