iPhone app for measuring AFR?

RanRich · 05-26-2017, 09:24 AM

I know Android folks have the Torque Pro app to measure air fuel ratio, but is there an iPhone app that can do the same? I have a WiFi enabled scanner from Amazon and the 'OBD Fusion' app which is great for clearing codes, but it can't measure AFR and I'd like to know what the car is running since I installed test pipes a few weeks ago and have a month remaining before getting tuned.

ChaseZ · 05-26-2017, 09:30 AM

DashCommand

SG4247 · 05-26-2017, 10:13 AM

ChaseZ that is awesome!

Please describe the hardware you are using?

ZOperaMan · 05-26-2017, 09:39 PM

OBD Fusion does display and log A/F ratio. It's a calculated PID.

I am using it with a Kiwi 3 interface.

--ZOM

ChaseZ · 05-28-2017, 06:56 AM

Quote:

Originally Posted by SG4247

ChaseZ that is awesome!

Please describe the hardware you are using?

Just a pioneer head unit (SPH-DA120 I believe) that has apple CarPlay and an OBDII Kiwi dongle with my iPhone. DashCommand is CarPlay compatible so the app comes up right on the head unit when the phone is connected with an apple adapter (hdmi/lightning).

Looks fancy a but nothing more to it than that. Shown is one of the dashcommand default gauge displays but you can completely customize it any way you want.

Fountainhead · 05-30-2017, 02:01 PM

chase your avatar is plain awesome.

RanRich · 05-30-2017, 03:46 PM

Thanks guys! Used Dashcommand through my iPhone with a dash mount. A/F ratio hovered at 14.7-14.8 at idle, cruise, and WOT. I know the sweet spot is reported to be 12.5-13, but is this number still safe?

Let me know what the range is between too rich and too lean.

SG4247 · 05-30-2017, 03:54 PM

I too just installed test pipes (cheap ones from ebay), so interested in the thread since I have the same concern as the OP on my A/F ratio too.

Im at 300 miles with no tune, and no CEL yet. Runs real good tho!

SG4247 · 05-30-2017, 04:22 PM

Sorry RanRich, dont mean to hijack, but I have to ask.

@ChaseZ

So let me get this straight - since apparently I am no longer tech savvy.

The Kiwi device plugs into the vehicles OBDII port, and transmits ECU real time data to your iphone.

The Dashcommand app on your iphone interpets that data from the Kiwi device, and makes it into a pretty and easy to read live engine function display on your iPhone, that the user can customize.

When you connect the iphone to the Pioneer head unit via a cable, the head unit uses an app called CarPlay to display the same engine function display that is on your iphone, onto the head unit display.

Is this correct?

ChaseZ · 05-30-2017, 11:59 PM

Correct. The app is still controlled from your phone, but the display is live on the head unit.

Everything is available here, including more specific details if needed.
http://www.palmerperformance.com

RanRich · 05-31-2017, 09:35 AM

Can someone please help explain an acceptable or safe A/F ratio range? I'm at 14.7 for all driving conditions now and want to be sure that isn't too lean to romp on the car before my tune in a few weeks.

SG4247 · 05-31-2017, 11:01 AM

RanRich,

I have dynoed and tuned many drag race engines on the flywheel dyno. For 87 pump gas and 101 VP we shoot for 12.5 - 13.0 A/F under full load, over the entire range from 4500 to 7500 rpm. This gets us close and it is a safe ratio. The final A/F is tuned at the track based on actual vehicle performance and atmospheric conditions. It is rare that the best dyno tune yeilds the best track times. Usually the car performs best with slightly richer fuel mixtures that what the dyno likes.

I generally dont even care about A/F ratios at idle and part throttle (because the engine is not under much load), just that the exhaust temp at those throttle positions is not real cold or real hot, which it generally isnt - unless something in the tune up is way off.

If my 370 was reporting 14.7 under WOT i would get a tune to bring it to 12.7 or so, and then go to the drag strip to see what it likes.

I dont know if this helps, but this is the same approach I plan to use on my 370Z.

05-26-2017, 09:24 AM	#1 (permalink)
RanRich Enthusiast Member Join Date: Mar 2015 Location: St. Louis Posts: 425 Drives: 09 PG Sport M6 Rep Power: 3372	iPhone app for measuring AFR? I know Android folks have the Torque Pro app to measure air fuel ratio, but is there an iPhone app that can do the same? I have a WiFi enabled scanner from Amazon and the 'OBD Fusion' app which is great for clearing codes, but it can't measure AFR and I'd like to know what the car is running since I installed test pipes a few weeks ago and have a month remaining before getting tuned. __________________ AAM \| Dynosty \| Ecutek \| Eibach \| Hawk \| H&R \| Nismo \| Stillen \| Stoptech \| Z1

05-26-2017, 09:30 AM	#2 (permalink)
ChaseZ A True Z Fanatic Join Date: May 2016 Location: Calgary Posts: 3,799 Drives: 16 370z Rep Power: 94682	DashCommand DYNAZOR and Fountainhead like this. Last edited by ChaseZ; 05-26-2017 at 09:33 AM.

05-26-2017, 09:39 PM	#4 (permalink)
ZOperaMan Base Member Join Date: Dec 2009 Location: Houston, Texas Posts: 82 Drives: 09 TT370z Yellow 6MT Rep Power: 15	OBD Fusion does display and log A/F ratio. It's a calculated PID. I am using it with a Kiwi 3 interface. --ZOM __________________ Chicane Yellow 2009 370Z Base \| AAM Twin Turbo \| *516whp* Built 3.7 Wiseco-K1 \| AAM Fuel Return, 3-in Dual Exh \| Injector Dyn 1000cc \| CJM Billet Hat-Aeromotive 340 \| Setrab \| Quaife LSD \| Clutchmaster 725 Dual Disc \| CSF Radiator

05-30-2017, 03:46 PM	#7 (permalink)
RanRich Enthusiast Member Join Date: Mar 2015 Location: St. Louis Posts: 425 Drives: 09 PG Sport M6 Rep Power: 3372	Thanks guys! Used Dashcommand through my iPhone with a dash mount. A/F ratio hovered at 14.7-14.8 at idle, cruise, and WOT. I know the sweet spot is reported to be 12.5-13, but is this number still safe? Let me know what the range is between too rich and too lean. __________________ AAM \| Dynosty \| Ecutek \| Eibach \| Hawk \| H&R \| Nismo \| Stillen \| Stoptech \| Z1

05-30-2017, 11:59 PM	#10 (permalink)
ChaseZ A True Z Fanatic Join Date: May 2016 Location: Calgary Posts: 3,799 Drives: 16 370z Rep Power: 94682	Correct. The app is still controlled from your phone, but the display is live on the head unit. Everything is available here, including more specific details if needed. http://www.palmerperformance.com Last edited by ChaseZ; 05-31-2017 at 12:01 AM.

05-26-2017, 10:13 AM	#3 (permalink)
SG4247 Track Member Join Date: Oct 2016 Location: OKC Posts: 724 Drives: 2010 touring Rep Power: 4486	ChaseZ that is awesome! Please describe the hardware you are using?

05-30-2017, 02:01 PM	#6 (permalink)
Fountainhead Track Member Join Date: Feb 2013 Location: FL Posts: 834 Drives: 2019 Civic Type R Rep Power: 14	chase your avatar is plain awesome.

05-30-2017, 03:54 PM	#8 (permalink)
SG4247 Track Member Join Date: Oct 2016 Location: OKC Posts: 724 Drives: 2010 touring Rep Power: 4486	I too just installed test pipes (cheap ones from ebay), so interested in the thread since I have the same concern as the OP on my A/F ratio too. Im at 300 miles with no tune, and no CEL yet. Runs real good tho!

05-30-2017, 04:22 PM	#9 (permalink)
SG4247 Track Member Join Date: Oct 2016 Location: OKC Posts: 724 Drives: 2010 touring Rep Power: 4486	Sorry RanRich, dont mean to hijack, but I have to ask. @ChaseZ So let me get this straight - since apparently I am no longer tech savvy. The Kiwi device plugs into the vehicles OBDII port, and transmits ECU real time data to your iphone. The Dashcommand app on your iphone interpets that data from the Kiwi device, and makes it into a pretty and easy to read live engine function display on your iPhone, that the user can customize. When you connect the iphone to the Pioneer head unit via a cable, the head unit uses an app called CarPlay to display the same engine function display that is on your iphone, onto the head unit display. Is this correct?

05-31-2017, 09:35 AM	#11 (permalink)
RanRich Enthusiast Member Join Date: Mar 2015 Location: St. Louis Posts: 425 Drives: 09 PG Sport M6 Rep Power: 3372	Can someone please help explain an acceptable or safe A/F ratio range? I'm at 14.7 for all driving conditions now and want to be sure that isn't too lean to romp on the car before my tune in a few weeks. __________________ AAM \| Dynosty \| Ecutek \| Eibach \| Hawk \| H&R \| Nismo \| Stillen \| Stoptech \| Z1

05-31-2017, 11:01 AM	#12 (permalink)
SG4247 Track Member Join Date: Oct 2016 Location: OKC Posts: 724 Drives: 2010 touring Rep Power: 4486	RanRich, I have dynoed and tuned many drag race engines on the flywheel dyno. For 87 pump gas and 101 VP we shoot for 12.5 - 13.0 A/F under full load, over the entire range from 4500 to 7500 rpm. This gets us close and it is a safe ratio. The final A/F is tuned at the track based on actual vehicle performance and atmospheric conditions. It is rare that the best dyno tune yeilds the best track times. Usually the car performs best with slightly richer fuel mixtures that what the dyno likes. I generally dont even care about A/F ratios at idle and part throttle (because the engine is not under much load), just that the exhaust temp at those throttle positions is not real cold or real hot, which it generally isnt - unless something in the tune up is way off. If my 370 was reporting 14.7 under WOT i would get a tune to bring it to 12.7 or so, and then go to the drag strip to see what it likes. I dont know if this helps, but this is the same approach I plan to use on my 370Z.

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