I knew I was running rich, but DAMN, I just hooked up a A/F meter and it idles off the scale of richness. According to my EMS with wideband its near stoich at idle, but my A/F meter reads otherwise. Just makes me wonder how off the stock O2 sensor is. Anyone ever tried out different O2 sensors just to compare?

 

stock sensor + autometer air/fuel meter = pretty lightshow.. it does what it can in my opinion.. lean on deceleration.. rich at low idle.. rich at acceleration.. and lightshow when cruising.. its just narroband.. and can only read so much..

for tuning, use only wideband meter and sensor of course.

 

Stock O2 sensor isn't inaccurate it is SLOW. The narrowband provides a delayed signal so you are always one step behind.

Wideband is the only true answer to your delima. Especially with an EMS.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Asahi &raquo;</TD></TR><TR><TD CLASS="quote">Stock O2 sensor isn't inaccurate it is SLOW. The narrowband provides a delayed signal so you are always one step behind.

Wideband is the only true answer to your delima. Especially with an EMS.</TD></TR></TABLE>Sorry, I didn't have time time really get into this with you but the stock o2 is about as accurate as the stock temp guage. I figured when you said you had done research on the Halmeter you had gotten reliable info. The stock o2 sensor sends only three voltage signals: Lean, Stoich or Rich and no variables in-between. The display from the Halmeter will only display the voltage outputs the o2 sensor sends it . So tuning with this is like trying to catch a fly in the dark.

Get the AEM o2 Sensor which plugs right into the AEM its a no brainer..... Or get a Techedge if you want a display


Modified by Christian at 8:10 AM 7/16/2003

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Asahi &raquo;</TD></TR><TR><TD CLASS="quote">Stock O2 sensor isn't inaccurate it is SLOW. The narrowband provides a delayed signal so you are always one step behind.

Wideband is the only true answer to your delima. Especially with an EMS.</TD></TR></TABLE>

 

obviously I dont plan on tuning with this.

christian, I dont know if you are 100% correct. The halmeter has increments and it doesnt just light up lean, stoich, or rich, it actually does have increments and lights up accordingly. but Im not gonna argue with you bc I dont know.
I did notice the delayed reaction time of the meter though so I do agree with the slowness of the stock O2 sensor.
anyway its a cool little light show for my show kaa

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Christian &raquo;</TD></TR><TR><TD CLASS="quote">Sorry, I didn't have time time really get into this with you but the stock o2 is about as accurate as the stock temp guage. I figured when you said you had done research on the Halmeter you had gotten reliable info. The stock o2 sensor sends only three voltage signals: Lean, Stoich or Rich and no variables in-between. The display from the Halmeter will only display the voltage outputs the o2 sensor sends it . So tuning with this is like trying to catch a fly in the dark.

Get the AEM o2 Sensor which plugs right into the AEM its a no brainer..... Or get a Techedge if you want a display


Modified by Christian at 8:10 AM 7/16/2003</TD></TR></TABLE>

Actually the O2 sensor send voltage signals and it can send a range from 0-1v which will read more than Lean, Stoich or Rich. That said the Halmeter or Autometer may not be able to do much with the 0-1v and the voltage feedback is always behind the actual situation the engine is currently experiencing.

That said you can tune with a stock O2 to some extent were approximately .87 on a voltmeter is in the lowe 13:1 AFR range. YOu can't do this aith an Autometer AFR hooked to a stock O2 though.

I do like the techedge setup and should have a v2.0 anyday. I have bought and seen the AEM unit and it is VERY nice if you have an EMS and don't need a display. They are relatively affordable if you don't want a display as well.

Trey

 

The AEM EMS display is currently being developed. I havent heard any final word yet on what its going to look like or what exactly its going to display.

 

IMO , the display isny really needed, if your tuning , your gonna be looking at everything in real time and datalogging anyway , so the laptop will show you what you need to know . i try to save moeny whereever possible

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itr206 &raquo;</TD></TR><TR><TD CLASS="quote">IMO , the display isny really needed, if your tuning , your gonna be looking at everything in real time and datalogging anyway , so the laptop will show you what you need to know . i try to save moeny whereever possible </TD></TR></TABLE>

I'd agree to some extent but if you are running on track and want to know what sort of AFR you are running under different circumstances the display is nice. The Techedge 2.0 is $40 more than the AEM and comes with a display. That is $360 vs $400. Seems like an easy choice unless you have an EMS . . .