Air Fuel Guage
Turbo Mini Forums

Is anybody using a air fuel mixture guage? If so what one? How is it wired and how accurate is it accross the full rev range? I am looking to fit one of these so I can keep a close eye on my mixture while I play with some settings. Thanks in advance

Mark

Aem is meant to be good. Thats what I will probably be buying soon

AEM and innovate are the most common ones used i think.

fitted an AEM in mine and can't fault it.

Im gonna be getting the AEM gauge, when i can afford it.
http://jdmperformance.co.uk/item_detail.php?prodID=449002999

Been using AEM for a while now.

If your are just after a AFR gauge then the AEM is a good compact unit, but if you are using MS or looking to do data logging you may be better with the Innovate one.

I put together a list of links the other day...

EGT driver with 0-5v output for logging, discounted at present.

http://www.o2simulator.com/index.php?main_...&products_id=13

FJO Wideband
http://www.fjoracing.com/products/WBAFR/

Zeitronix
http://www.zeitronix.com/Products/Products.htm

AEM
http://www.aempower.com/ViewCategory.aspx?CategoryID=67

Not sure of brand
http://www.airfuelmeter.com/french/afm1_fr_info.htm

FAST
http://www.fuelairspark.com/Products/detai...ter/default.asp

NGK Branded, including NTK sensor as far as I know
http://www.ngksparkplugs.com/products/air-...9000&country=US

Dynojet Wideband
http://www.dynojet.co.uk/wideband/

WMS, never heard of them
http://www.wmsracing.com/wmsweb/wideband.htm

JAW
http://www.14point7.com/JAW/JAW.htm

PLX Devices
http://plxdevices.com/

And of course you are aware of Techedge.
http://www.wbo2.com/

NTK 7 pin sensor in the UK
http://www.lambdasensor.co.uk/main/mwide.htm

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

ive got one of these, im hoping that there not bab since no one has mentioned them

http://cgi.ebay.co.uk/52mm-auto-gauge-air-...id=p3286.c0.m14

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

Mike that looks like it is for a narrowband sensor? If so I hate to say this but its garbage.......

Lockfast, what you need is a WIDEBAND lambda sensor and display. This will measure accurately from 10:1 AFR to 18:1 AFR.

Tom what will mine record then kid?

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

A narrowband one is only accurate at cock on stoichiometric (14.7 AFR), but the other achilles heel is that is doesn't react quickly enough to be useful in knowing what is going on.

Pinched from the MOTEC site-

Narrow Band Lambda - Narrow Band Lambda provides an output voltage between .1v and 1.0v dc based on the oxygen differential between the exhaust pipe and the atmosphere. This can give an indication of the air fuel ratio at which the engine is running however the sensor range is limited to ratios of about 14.0:1 (1.0v) and 15.4:1(.1v). At ratios beyond this range, the sensor output does not increase or decrease making it virtually useless for tuning an engine for anything other than steady state cruising. The advantage of Narrow Band Lambda comes into play while trying to keep emissions in check. The sensor provides a signal to the ECU which basically indicates either rich (output voltage above .5v air fuel less than 14.7) or lean (output voltage below .5v air fuel greater than 14.7) but really does not describe to what degree the mixture is either rich or lean. This is fits perfectly in with the need for "perturbation" of today's 3 way catalysts which need excess air to catalyze Hydrocarbon and Carbon Monoxide, and excess fuel with which to reduce Oxides of Nitrogen. Because of this requirement by the catalyst, Narrow Band Lambda Control is constantly varying the air/fuel ratio both slightly above and below 14.7:1 in such a manner that the average air fuel ratio is maintained at 14.7:1. Most engines in use today, produce peak power with air fuel ratios in the 12:1 - 13.5:1 range well below the measuring capability of a narrow band lambda sensor. It is for this reason that Narrow Band Lambda is of no help for high loads and or RPM's.

Wide Band Lambda - Wide Band Lambda provides the ECU with a specific definition of the air fuel ratio at which the engine is currently running. Wide Band Sensors are able to depict air fuel ratio's as rich as 10.5:1 and as lean as 18:1 and report the exact lambda to the ECU. This is done a number of ways. MoTeC M4 and M48 ECU's use Bosch 4 wire Wide Band Lambda sensors to measure wide band lambda. MoTeC M400/600/800/880 ECU's use either the Bosch LSU or the NTK UEGO 5 Wire Wide Band Lambda Sensor. MoTeC then uses this information to determine the actual lambda and displays this on the console and or uses it for Lambda Control if the ECU is set up to do so.

i have an brand new sealed aem gauge for sale if you want one? (after £180 inc post)

joe

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

Thanks everybody for your help.

Joe you got PM

Forgot about that one

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will