i know a/r gauge are ---- on narrowbands, but how ----?.. do they give an APPROXIMATE reading or what? im basically wanting to get a approx reading for my 4agte with extra injectors at 18psi and have a a/f gauge

 

Very.

It only measures 14.2:1 - 15.2:1.. it's a non-linear voltage scale. Your turbo shoul dbe running generally a 12.1:1 -12.3:1 AFR... again, narrowband is very useless.

 

http://www.zeitronix.com/questions/O2questions.htm

The narrow band does what its designed to do; read afrs and tell you if its lean stoick or rich and thats about it. It doesnt have the linear resolution of a wide band to tell you how lean or how rich the mixture is. So, WB is the only way to go and a narrow band is just a light show.

 

as useless as kain.

 

I wouldn't go that far. Those A/F gauges have pretty lights.

If you're running 18psi and trying to tune with a narrowband, you should kick yourself in the *****.
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You could say the narrowband sensor is about 10% accurate, so there would be a 90% probability that you'll blow your motor up.

The ONLY downside to getting a wideband is your friends calling every other day asking to borrow it.

 

For real! I finally told one of them that if he buys me an extra LSU4, I'll unhook my controller for him to borrow for a day. (I have my wideband hardware into my race car). ..hehehe, I got a free LSU4 out of the deal.

 

well atm the injectors 2 x 265cc are at about 60% duty cycle. the stock ecu fuels it fine for 12psi, then *apparently* starts going lean, so with the timing wound bak abit + extra fuel and 18psi it blows abit of black smoke on WOT so hoping its all good..

dont care how rich it runs, as im selling the peice but as long as its got to much fuel then its all good ..


if the car is beginning to go lean, would the a/f gauge on WOT still stay rich or ?

 

A narrowband might tell you "rich" if your afr is 14:1. It would probably say the same thing at 9:1. They really aren't terribly useful.

 

Could have swore I already answered this in the first post after your question.