Booooooost - Page 2

Aurora40 · 05-26-08, 06:57

You know narrowband O2's are pretty inaccurate right? The difference between 870 and 940 could just be the sensors are old or something. I wouldn't assume that means it is leaner than when they were reading 940mV. You might want to invest in a wideband O2 if you plan on making fueling adjustments.

victory · 05-26-08, 06:50

Quote:

Originally Posted by Aurora40

You know narrowband O2's are pretty inaccurate right? The difference between 870 and 940 could just be the sensors are old or something. I wouldn't assume that means it is leaner than when they were reading 940mV. You might want to invest in a wideband O2 if you plan on making fueling adjustments.

Brand new Denso O2 sensor. You can make decent estimates with the narrowband. If you want to get it perfect, yeah, spend $400 on a wideband. For my mod level, that's about $400 more than i need to spend.

Aurora40 · 05-28-08, 03:50

Not trying to drag it out, but why do you say they make for decent estimates? What A/F ratio would you say 870mV roughly relates to, and what does 940mV relate to? Have you ever heard of anyone doing wideband and narrowband comparisons to validate that the difference between high 800's and mid 900's actually means anything?

You don't have to spend $400. You could probably spend $70 at a dyno facility and get a few dyno pulls and the wideband data to accompany them. Changing the fueling without a wideband seems like a bad idea to me though. You've obviously spent some money to be able to tune your PCM, a little extra to find out how that tune is working seems like a good investment. Just my two cents.

musthavemuzk · 05-29-08, 10:14

even though i am stock with no plans to mod the engine soon i have to agree with aurora40. do not have to buy wideband. find a dyno shop that does wideband tuning. might even score something on regalgs or CGP. there always seems to be threads there about looking for someone to tune. i know you said you have the program and all, but seems to me(as well as what is constantly said on the forums) is that if you are serious about modding and wanting to get the most from it then you need to do it....and not think about doing it. this includes wideband.
but as with many things it comes down to your own pockets and what you choose to do.

good luck with this.

Monty