I know the Autometer one is just a light show, but i've seen more and more people with the Greddy and Defi ones. Are they any more acurate?

I'd love one of the new AEM wideband gauges, but my god... it's a pretty hefty price tag.

any info would be appreciated

 

any gauge reading voltage from your stock O2 sensor won't be accurate. The GReddy "narrow wideband" isn't accurate either. If you're going to buy a wideband o2 system, make sure it uses the cheaper Bosch (can't recall model#) sensors that cost around $45. Cheapest brands (~ <$400) to look at are TechEdge, PLX devices, Innovate LM-1. As for the do-it-yourself kits... they're actually pretty difficult to assemble. Good luck!

 

[QUOTE]Originally posted by vodalus
any gauge reading voltage from your stock O2 sensor won't be accurate.

 

The Autometer and other "narrowband" gauges are very accurate- for what a narrowband measures. What people mistake a "liteshow" for is actually proper operation. The narrowband oscillates back and forth around rich/lean which is all they indicate. For THAT, they are very good. This is all most people need- an indication that the fuel system is functioning normally. Most fuel system failures are pretty catastrophic and result in a very lean condition- not a slight change. Assuming proper tuning with a wideband, a narrowband gauge acts as a good safety/warning device.

 

The Autometer guage would probably also be very acurate if connected to a WBO2. It is the resolution of the sensor that causes the "light show".

 

the narrowbands are pretty accurate from 14:1 to 15:1 or so.

everything outside that, its pretty inaccurate.

the new aem widebands arent that expensive compared to the fjo's

they are only $430 shipped

well worth it, imo

 

[QUOTE]Originally posted by mase1
the narrowbands are pretty accurate from 14:1 to 15:1 or so.

everything outside that,

 

A/F ratio meters are tools -- whether a tool does the job or costs too much depends on the job that it's asked to do. Marcucci is right on target: if your goal is to monitor your factory ECU (and O2 sensor) for malfunction, a lightshow based on the stock O2 sensor is just fine. If you want to monitor your low-boost system with rising rate fuel pressure regulator to verify that you never (rarely?) get lean for any length of time, a narrowband may be OK too. But if you want to set up your own maps, there are only two alternatives -- use someone elses dyno and wideband (large $$$ for short time) or get your own wideband. Doing it yourself, with your own wideband, is particularly attractive if your ECU has autoprogram capability and even more so if it will then use the wideband to adjust the autoprogrammed map in an overall closed loop system.

I use an AEM wideband feeding an AEM ecu. I took a long time automapping, reviewing, revising, automapping some more. Overall, probably more than 100 hours of driving, analysing, and programming time. But the results are excellent. The car starts well, cold/warm/hot, idles well, and runs strong with no bogs or surges. Now that the map is good, I run closed loop under all conditions, road and track, and my AFR is always on target.

I've not had any problems with AEM customer support. Occasionally they are slow to respond, but at their worst they are in the top half of auto equipment suppliers I've dealt with. At their best, they're excellent.

 

[QUOTE]Originally posted by mase1
the narrowbands are pretty accurate from 14:1 to 15:1 or so.

everything outside that,

 

any possibility of getting a GB for the TechEdge 2.0A unit w/ the 7057 sensor?