Whats rich and whats not?

[icecream_man]

I have a 98 gsx with several mods, I was told it was running rich, however I was also told i was running lean. My car is out of tune, and i was told it was set to run richer that lean because I was also told it was better that way. It idles anywhere from 15 to 17 on my wideband, but when I drive it bounces back and fourth somewhat but for the most part the light stays red. If you mash the gas it sets on ten. Whats the target number, and is this hard on my car, is it safe? whats considered lean, and whats considered rich?

 

[LTUDSM]

I have a 98 gsx with several mods, I was told it was running rich, however I was also told i was running lean. My car is out of tune, and i was told it was set to run richer that lean because I was also told it was better that way. It idles anywhere from 15 to 17 on my wideband, but when I drive it bounces back and fourth somewhat but for the most part the light stays red. If you mash the gas it sets on ten. Whats the target number, and is this hard on my car, is it safe? whats considered lean, and whats considered rich?

What are these several mods.that you have? How are controlling fuel? any loggers??
the answers to your questions are:

15-17 is lean..... 14.7 is a perfect air/fuel mixture.14.7< = lean
14.7> = rich

Well 10.0 at WOT is kinda rich,but is not that bad,it better stay on a richer side during wot,then on lean side.

while you driving,(cruising) the wideband gauge,has to bounce back and forth.

 

[biker_joe89]

14.7 is the magic number. anything higher is lean anything below is rich

What are these several mods.that you have? How are controlling fuel? any loggers??
the answers to your questions are:

15-17 is lean..... 14.7 is a perfect air/fuel mixture.14.7< = lean
14.7> = rich

Well 10.0 at WOT is kinda rich,but is not that bad,it better stay on a richer side during wot,then on lean side.

while you driving,(cruising) the wideband gauge,has to bounce back and forth.

well put LTUDSM

 

[american-rice]

If it is stuck on 10 then that may be as low as the wideband will go. You may be all the way deep into the 9's. Really rich!

 

[biker_joe89]

If it is stuck on 10 then that may be as low as the wideband will go. You may be all the way deep into the 9's. Really rich!

yes which would mean there is horsepower you are losing out on

 

[icecream_man]

So when I'm driving, and it's running anywhere from 14 to 17, is that bad?

 

[mindset]

Correct me if I'm wrong, but I though 12.7 AFR was the number you want to hit.

 

[american-rice]

12.7 @ wot,but I think that would be leaner than I'd want.

 

[icecream_man]

I have the apexi SAFCII.

 

[biker_joe89]

I agree thats a bit lean for my likings

 

[kp116]

A wideband doesn't cycle during closed loop. A narrow band 02 sensor does.. If you have a wideband it should stay somewhat close to 14.7 at warm idle and steady cruise if everything is set right. If your wideband says 10.0 thats probably the lowest it can read. So it might actually be even richer than 10.0. I wouldn't say there should be a exact a/f your car should be at because every car is a little different. If I had to put a number out there I would say 11.5 at wot on pump gas is probably where you want it.

Correct me if I'm wrong, but I though 12.7 AFR was the number you want to hit.

At wot on a n/a car I can see 12.7 being somewhere where you would want it. But for a boosted car thats on the lean side. I don't think I would even want that lean of a a/f even on e85....

 

[LTUDSM]

What kind of Wideband you got???

12.7 is a bit to lean during WOT. Im running 11.2 @WOT.So like i said.its better to be a bit on a rich side during wot.Then later pickin up a peaces on a road from a blown engine .

And try to set the AFC to a lean side on higher RPM range. from 4k up to 7500.and look for the readings on wideband....

 

[icecream_man]

Sorry had a little confusion. It's running rich, but I failed to realize that my factory computer was leaning it out when it was just idleing or just cruising, how ever when I mash it it does go to 10 or maybe even lower. But thanks anyways guys, you have been a big help!

 

[mindset]

What kind of Wideband you got???

12.7 is a bit to lean during WOT. Im running 11.2 @WOT.So like i said.its better to be a bit on a rich side during wot.Then later pickin up a peaces on a road from a blown engine .

And try to set the AFC to a lean side on higher RPM range. from 4k up to 7500.and look for the readings on wideband....

I have a AEM UEGO, but it's not installed yet because I have been focusing on putting in my motor and trans. I bought it because it was a good deal, just waiting to install when I get the time. I'd rather get it running first before I do another mod.

Thanks for correcting me guys.

 

[EvoRage]

When you are driving around just normally your computer is going to be trying to stay around 14.7 or so. Like others have said, if you go WOT and you see it higher then 12.5 or so you need to adjust it lower because you are running lean which can lead to damage. Running rich which is lower than lets say 11 then you are running rich which is mainly just robbing power. It also depends heavily on your mods and the fuel you are running on.

 

[LTUDSM]

I have a AEM UEGO, but it's not installed yet because I have been focusing on putting in my motor and trans. I bought it because it was a good deal, just waiting to install when I get the time. I'd rather get it running first before I do another mod.

Thanks for correcting me guys.

I was asking the guy,who made a thread,

 

[mindset]

I was asking the guy,who made a thread,

Ohhh ok I figured since you dropped the 12.7 number you were referring to me.

 

[LTUDSM]

Ohhh ok I figured since you dropped the 12.7 number you were referring to me.

sometimes posts are confusing ,most of a time people are gettin lost ...