Air Fuel Ratio

patro · January 16th, 2009, 05:33 PM

This morning i install my new brenspeed tune and is awesome the car feels very nice but i check my wideband in 4th gear wot and is 12.5 its safe?? what can i do? i forgot my car has a vortech supercharger HO aftercooled

onederful100 · January 16th, 2009, 06:00 PM

12.5 is a little leaner than i would go. 11.5-12.0 is the usual acceptable range. didn't you have a different tune where it was richer?

patro · January 16th, 2009, 06:09 PM

Originally Posted by onederful100

12.5 is a little leaner than i would go. 11.5-12.0 is the usual acceptable range. didn't you have a different tune where it was richer?

yes i have the diablo sport tune it came with the vortech kit, but it run in 10.1 the afr nad thats is why i bougth the brenspeed tune, but is ti dangerous, or i can add some fuel to the tune with the sct x3 programmer to the safe zone

NastyFX4 · January 16th, 2009, 06:12 PM

What kind of wideband is it? The gauge could be off. The tune could be off. Contact Brenspeed and let them know. Don't go WOT until you get it fixed or you could switch back to the other tune.

Emay · January 16th, 2009, 06:41 PM

I wouldn't exceed 11.8 on that stock motor if your over 8 lbs of boost. Definately don't go wot until you straighten it out..

patro · January 16th, 2009, 06:51 PM

Originally Posted by NastyStang113

What kind of wideband is it? The gauge could be off. The tune could be off. Contact Brenspeed and let them know. Don't go WOT until you get it fixed or you could switch back to the other tune.

Its aem wideband i don t know the model, i already contact via email at brenspeed i hope they can help me

NastyFX4 · January 16th, 2009, 07:22 PM

I've seen some AEM Widebands that read improperly. Although, I wouldn't be hoping and praying for that to be the case. Let's hear what Brenspeed has to say about it.

kenneth · January 16th, 2009, 07:37 PM

That's a little lean for FI,but as mentioned before it may be that the gauge is off.

Trick Tuners · January 16th, 2009, 09:14 PM

Yup thats a little lean for street gas. I put this together on what your AFR should be.
What should my Air Fuel Ratio (AFR) be? - Trick Tuners Forums

chad05gt · January 17th, 2009, 07:26 AM

Originally Posted by Trick Tuners

Yup thats a little lean for street gas. I put this together on what your AFR should be.
What should my Air Fuel Ratio (AFR) be? - Trick Tuners Forums

That's good stuff...

2006greyGT · January 17th, 2009, 10:44 AM

I'm sorry....but you forgot you had a blower??? I thought I was old...

patro · January 17th, 2009, 11:30 AM

Originally Posted by 2006greyGT

I'm sorry....but you forgot you had a blower??? I thought I was old...

jajajajajaja hi,nop i forgot to tell you, my car has a supercharger jejeje, but yeap im too old 28 years old

patro · January 17th, 2009, 11:36 AM

i already add some gas with sct programmer and the new afr is 11.5-11.8 the car feels awesome i feel like a turbo lag and its adictive, i just want to wait for brenspeed advice

Trick Tuners · January 18th, 2009, 10:58 AM

If the car didn't detonate at 12.5 you may be able to add a little timing now that the AF is correct. Here is some info on detonation.
Detonation Explained

January 16th, 2009, 05:33 PM	#1
patro Regular 2006 mustang gt Join Date: Nov 2008 Location: mexico Posts: 84 iTrader: 0 reviews	Air Fuel Ratio This morning i install my new brenspeed tune and is awesome the car feels very nice but i check my wideband in 4th gear wot and is 12.5 its safe?? what can i do? i forgot my car has a vortech supercharger HO aftercooled Last edited by patro; January 16th, 2009 at 05:34 PM. Reason: i forgot someting

January 16th, 2009, 06:00 PM	#2
onederful100 Hardcore Enthusiast 2007 GT 2000 GT Join Date: Jun 2007 Location: Honolulu, HI Posts: 1,890 iTrader: 0 reviews	12.5 is a little leaner than i would go. 11.5-12.0 is the usual acceptable range. didn't you have a different tune where it was richer? __________________ 2007 GT 5spd 2000 GT 5spd whipple crew member 2-Stang Crew My Car

January 16th, 2009, 06:12 PM	#4
NastyFX4 Made in U.S.A. 2011 F150 FX4 Join Date: Jan 2009 Location: Florida Posts: 16,010 iTrader: 9 reviews	What kind of wideband is it? The gauge could be off. The tune could be off. Contact Brenspeed and let them know. Don't go WOT until you get it fixed or you could switch back to the other tune. __________________

January 16th, 2009, 06:41 PM	#5
Emay May 08 ROTM 2008 Audi S6 Join Date: Oct 2006 Location: S. Elgin Posts: 6,684 iTrader: 3 reviews	I wouldn't exceed 11.8 on that stock motor if your over 8 lbs of boost. Definately don't go wot until you straighten it out.. __________________ FLICKR Unique Imagery

January 16th, 2009, 07:22 PM	#7
NastyFX4 Made in U.S.A. 2011 F150 FX4 Join Date: Jan 2009 Location: Florida Posts: 16,010 iTrader: 9 reviews	I've seen some AEM Widebands that read improperly. Although, I wouldn't be hoping and praying for that to be the case. Let's hear what Brenspeed has to say about it. __________________

January 16th, 2009, 07:37 PM	#8
kenneth Hardcore Enthusiast 2006 Mustang GT 11.45@123.61 Join Date: Nov 2007 Location: Cut Off, LA. Posts: 1,468 iTrader: 2 reviews	That's a little lean for FI,but as mentioned before it may be that the gauge is off. __________________ Stock for now.

January 16th, 2009, 09:14 PM	#9
Trick Tuners MM Fanatic KB'd GT Join Date: Nov 2006 Location: San Diego Posts: 4,467 iTrader: 3 reviews	Yup thats a little lean for street gas. I put this together on what your AFR should be. What should my Air Fuel Ratio (AFR) be? - Trick Tuners Forums __________________ Check out my forums for stuff on troubleshooting, tuning, etc We teamed up with Socal Performance Racing to bring dyno tuning to San Diego. Be friends with us on FB

January 17th, 2009, 10:44 AM	#11
2006greyGT Premium Member 2006 Satin Silver GT 11.08@125.22 Join Date: Aug 2007 Location: KC Posts: 3,073 iTrader: 0 reviews	I'm sorry....but you forgot you had a blower??? I thought I was old... __________________ 2.6l KENNE BELL 298 Stroker, Ported heads Pro Motion Built 3650/McLeod RST/ MGW Short Throw Long tube/O/R X /Borla Touring 8 rib/65 lb injectors/GT500 twin fuel ET Drag Slicks/3.73 gear Detroit Truetrac /CDC AGR Spoiler

January 17th, 2009, 11:36 AM	#13
patro Regular 2006 mustang gt Join Date: Nov 2008 Location: mexico Posts: 84 iTrader: 0 reviews	i already add some gas with sct programmer and the new afr is 11.5-11.8 the car feels awesome i feel like a turbo lag and its adictive, i just want to wait for brenspeed advice

January 18th, 2009, 10:58 AM	#14
Trick Tuners MM Fanatic KB'd GT Join Date: Nov 2006 Location: San Diego Posts: 4,467 iTrader: 3 reviews	If the car didn't detonate at 12.5 you may be able to add a little timing now that the AF is correct. Here is some info on detonation. Detonation Explained __________________ Check out my forums for stuff on troubleshooting, tuning, etc We teamed up with Socal Performance Racing to bring dyno tuning to San Diego. Be friends with us on FB

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