what shoudl afrs be at crusing?

WRXout · 04-01-2005, 07:53 PM

is 14.7 air fuel ratio appropriate? when crusing around 80 or 60 just cruising thanks.

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Nat · 04-01-2005, 08:38 PM

Yes. The ECU will attempt to maintain stoichmetric A/F ratios.......about 14.7:1.

buzz313th · 04-01-2005, 09:42 PM

Weird.... My 05 WRX always maintains 14.5 -14.6.... But I have never seen 14.7 anywhere except idle.

Running StreetTuner and Cobb STX Mods...(Stage 2)

ride5000 · 04-02-2005, 07:59 AM

how are you determining that it runs 14.5 or 14.6?

buzz313th · 04-02-2005, 04:58 PM

Delta Dash.... with the Stock Narrowband Sensor....

But I have read on the EFI forums, that it is sometimes better to run slightly richer than 14.7 at cruise.

jaxscuby · 04-02-2005, 09:32 PM

or wb with utec/tuna data log..

feiron · 04-03-2005, 06:23 AM

notice at 0tps and 0% load the afr will go very lean... above 20s

you just dont want to run lean when boosting and at high rpm

RiftsWRX · 04-03-2005, 12:37 PM

Quote:

Originally Posted by feiron

notice at 0tps and 0% load the afr will go very lean... above 20s

you just dont want to run lean when boosting and at high rpm

It's because the injectors are completely cut for emissions and fuel economy.

Jorge (RiftsWRX)
www.ProjectWRX.com

04-01-2005, 07:53 PM	#1
WRXout Scooby Specialist Member#: 52908 Join Date: Jan 2004 Location: Houston, on highway 6 Vehicle: 2005 WRX STI FTI 20G ASPEN WHITE	what shoudl afrs be at crusing? is 14.7 air fuel ratio appropriate? when crusing around 80 or 60 just cruising thanks. * Registered users of the site do not see these ads.

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04-01-2005, 08:38 PM	#2
Nat Scooby Specialist Member#: 759 Join Date: Jan 2000 Chapter/Region: NESIC Location: Warwick, RI Vehicle: 2004 WRX 2000 SV650	Yes. The ECU will attempt to maintain stoichmetric A/F ratios.......about 14.7:1.

04-01-2005, 09:42 PM	#3
buzz313th Scooby Newbie Member#: 37008 Join Date: May 2003 Chapter/Region: SCIC Location: Los Angeles Vehicle: 2005 WRX Sedan (STX) Crystal Grey -TeamBrew-	Weird.... My 05 WRX always maintains 14.5 -14.6.... But I have never seen 14.7 anywhere except idle. Running StreetTuner and Cobb STX Mods...(Stage 2)

04-02-2005, 07:59 AM	#4
ride5000 Scooby Guru Member#: 32792 Join Date: Feb 2003 Chapter/Region: NESIC Location: lincoln, ri Vehicle: 2003 GGA MBP 12.9 / 105+	how are you determining that it runs 14.5 or 14.6?

04-02-2005, 04:58 PM	#5
buzz313th Scooby Newbie Member#: 37008 Join Date: May 2003 Chapter/Region: SCIC Location: Los Angeles Vehicle: 2005 WRX Sedan (STX) Crystal Grey -TeamBrew-	Delta Dash.... with the Stock Narrowband Sensor.... But I have read on the EFI forums, that it is sometimes better to run slightly richer than 14.7 at cruise.

04-02-2005, 09:32 PM	#6
jaxscuby n00b Moderator Moderator Member#: 10613 Join Date: Sep 2001 Chapter/Region: South East Location: F L O R I D A Vehicle: 2002 USDM WRX WRB	or wb with utec/tuna data log..

04-03-2005, 06:23 AM	#7
feiron Scooby Specialist Member#: 62327 Join Date: May 2004 Chapter/Region: VIC Location: Westwood Plateau, Coq Vehicle: 2005 WRB STI [S600BY]	notice at 0tps and 0% load the afr will go very lean... above 20s you just dont want to run lean when boosting and at high rpm