Running too lean?

Sharif@Forged · 12-27-2009, 03:46 PM

Quote:

Originally Posted by G37Sam

Not that I know off, but I am going on a dyno when my headers come in for sure.

What's the most accurate way to measure A/F numbers? Would using sniffers in the tailpipe be enough?

Most accurate method is a direct AF sensor plumbed into the exhaust stream before any cats.

Tailpipe sniffers vary in accuracy, based on the method and dyno, but the good ones are fairly accurate, and certainly accurate enough to determine if you are running dangerously lean.

G37Sam · 12-27-2009, 04:53 PM

Sharif my man, I have no cats

would sniffers be good enough?

Sharif@Forged · 12-27-2009, 10:35 PM

Quote:

Originally Posted by G37Sam

Sharif my man, I have no cats

would sniffers be good enough?

Yes.

G37Sam · 01-13-2010, 06:11 PM

Finally!

Got my car logged via UpRev Cipher

jpit · 01-14-2010, 09:38 PM

I thought most new cars have wideband sensors installed. My Dash Dyno reads A/F
ratio from three different sensors. The manual says that if a wideband sensor is not installed it won't give a reading.

Daishi · 06-01-2010, 08:53 AM

Quote:

Originally Posted by jpit

I thought most new cars have wideband sensors installed. My Dash Dyno reads A/F
ratio from three different sensors. The manual says that if a wideband sensor is not installed it won't give a reading.

yes our primary o2 sensors are wideband sensors straight from the factory thats why they are so expensive to replace.

Q8y_drifter · 06-01-2010, 10:25 AM

Can't we use the stock O2 sensors on the manifolds for AFR readings then?

12-27-2009, 04:53 PM	#17 (permalink)
G37Sam A True Z Fanatic Join Date: Dec 2008 Location: Dubai, UAE Posts: 1,507 Drives: RB'd G37 Rep Power: 20	Sharif my man, I have no cats would sniffers be good enough? __________________ '14 Viper GTS '08 RB'd G37S - Sold

01-13-2010, 06:11 PM	#19 (permalink)
G37Sam A True Z Fanatic Join Date: Dec 2008 Location: Dubai, UAE Posts: 1,507 Drives: RB'd G37 Rep Power: 20	Finally! Got my car logged via UpRev Cipher __________________ '14 Viper GTS '08 RB'd G37S - Sold

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01-14-2010, 09:38 PM	#20 (permalink)
jpit Enthusiast Member Join Date: Feb 2009 Location: Washington State Posts: 440 Drives: 370Z Tour MT w/Spt Rep Power: 16	I thought most new cars have wideband sensors installed. My Dash Dyno reads A/F ratio from three different sensors. The manual says that if a wideband sensor is not installed it won't give a reading.

06-01-2010, 10:25 AM	#22 (permalink)
Q8y_drifter Enthusiast Member Join Date: Mar 2010 Location: Kuwait Posts: 306 Drives: 08 Infiniti G35 5AT Rep Power: 15	Can't we use the stock O2 sensors on the manifolds for AFR readings then?