Whipple AF ratio goes rich at 5500 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

jasycz28 · 05-13-2011, 12:12 AM

Mods - Whipple.

Wondering if anyone else has seen this? I was getting my dyno tune today and every pull the AF ratio dropped to about 9 at 5500. So we through back in the whipple tune same thing. My tuner tried everything even taking fuel away after 5500 and no fix. Could this be the MAF sensor? Maybe I have the weak one?

jasycz28 · 05-13-2011, 11:11 PM

Well I checked and I have the "good" MAF part number. Any ideas?

Slowhawk · 05-14-2011, 08:06 PM

Hard to say but the scanning while making the run should indicate the problem.

Meister@Torq · 05-15-2011, 11:24 PM

Most likely the Catalyst temperature model is becoming active. There is also additional fueling for Intake Valve temps....not sure what they do in their tunes but those are common unless they are commanding rich at that RPM

I suggest finding a new tuner

DSX · 05-16-2011, 12:07 PM

Quote:

Originally Posted by Meister@Torq

Most likely the Catalyst temperature model is becoming active. There is also additional fueling for Intake Valve temps....not sure what they do in their tunes but those are common unless they are commanding rich at that RPM

I suggest finding a new tuner

COT wouldn't really come into play if it was done right. COT commands a 1.21 multiplier which ends up being 12.18 AFR for gasoline. Even that's still leaner than a blower car should be, which means if COT is driving it, the MAF and VE are waaaaaaaaaaaay wrong.

I too suggest finding a new tuner.

MECH-ENG · 05-16-2011, 10:52 PM

I have seen cars with perfect VE and MAFs able to be forced rich by other possibly emission related systems. Now while some suggest a new tuner to be the solution I'm sure there are things that even the "experienced" tuners don't know. It's all about the level of engine management understanding the tuners perform by. Hard to know who the truely knowledgable ones are from the ones who can just sell them selves to you well.

hoffmk2003 · 05-17-2011, 05:48 AM

Are you doing a Maf only tune or SD tune? I would suggest disabling some of the CAT overtemp, DFCO and all other fuel modifiers while tuning to try to narrow it down. It may help to do a maf only tune to start to eliminate some of the VE stuff as a possible source of the problem. Just keep the tune on the rich side as insurance.

Ken

DSX · 05-17-2011, 12:13 PM

Quote:

Originally Posted by MECH-ENG

I have seen cars with perfect VE and MAFs able to be forced rich by other possibly emission related systems. Now while some suggest a new tuner to be the solution I'm sure there are things that even the "experienced" tuners don't know. It's all about the level of engine management understanding the tuners perform by. Hard to know who the truely knowledgable ones are from the ones who can just sell them selves to you well.

I'd bet an obscene amount of money that I'm right.

DFCO won't matter during WOT.

MECH-ENG · 05-17-2011, 10:14 PM

Quote:

Originally Posted by DSX

I'd bet an obscene amount of money that I'm right.

DFCO won't matter during WOT.

I agree with you that DFCO and COT are not likely the cause of the rich condition. I have also even seen where the MAF transfer function in the upper rpm could be just fine and where the airmodel in the light throttle cruise conditions being only slightly off could cause a global effect on the WOT afr shifting it either lean or rich direction depending on the values.

jasycz28 · 05-18-2011, 12:43 PM

Quote:

Originally Posted by Meister@Torq

Most likely the Catalyst temperature model is becoming active. There is also additional fueling for Intake Valve temps....not sure what they do in their tunes but those are common unless they are commanding rich at that RPM

I suggest finding a new tuner

COT is diabled

Tampa Tuning · 05-18-2011, 06:46 PM

Quote:

Originally Posted by jasycz28

COT is diabled

exactly.

jasycz28 · 06-07-2011, 07:06 PM

The issue is fixed....

I went to a dynojet and had no problems. The problem was something between the Camaro and the loaded mustang dyno. Here are my numbers.

After a few tweeks on 91 octane it put down 570hp and 517tq. On 100 octane it put down 585hp and 537tq. This was done with the 90 degree phoenix heat around 10:00 AM.

Mods are whipple and muffler delete

91 Octane

100 Octane

JANNETTYRACING · 06-09-2011, 08:01 AM

Quote:

Originally Posted by jasycz28

The issue is fixed....

I went to a dynojet and had no problems. The problem was something between the Camaro and the loaded mustang dyno. Here are my numbers.

After a few tweeks on 91 octane it put down 570hp and 517tq. On 100 octane it put down 585hp and 537tq. This was done with the 90 degree phoenix heat around 10:00 AM.

Mods are whipple and muffler delete

91 Octane

100 Octane

If I am Reading your Dyno Graph correctly your AFR is Very Lean for Most of the Run and just gets in to the safe zone at the top.

Should Read 11.5:1 Bottom to Top Flat like a table.

jasycz28 · 06-09-2011, 09:27 AM

Quote:

Originally Posted by JANNETTYRACING

If I am Reading your Dyno Graph correctly your AFR is Very Lean for Most of the Run and just gets in to the safe zone at the top.

Should Read 11.5:1 Bottom to Top Flat like a table.

The AFR was taken in the spot of the rear O2 sensor. If I ever get my Fesler dual gauge pod (on back order) I will pull my midpipe and get the O2 bung welded in for my wideband.

JANNETTYRACING · 06-09-2011, 01:32 PM

Quote:

Originally Posted by jasycz28

The AFR was taken in the spot of the rear O2 sensor. If I ever get my Fesler dual gauge pod (on back order) I will pull my midpipe and get the O2 bung welded in for my wideband.

I have a couple of the Dual Pods in stock

jasycz28 · 06-09-2011, 01:46 PM

Quote:

Originally Posted by JANNETTYRACING

I have a couple of the Dual Pods in stock

Well if I didn't have free (points) money through phastek then I would go through you. But pod is free for the amount of points I have so I can wait a little bit.

JANNETTYRACING · 06-09-2011, 02:42 PM

Quote:

Originally Posted by jasycz28

Well if I didn't have free (points) money through phastek then I would go through you. But pod is free for the amount of points I have so I can wait a little bit.

If you change your Mind I will let is go for my cost.

Ted.

Big Rob · 06-09-2011, 10:07 PM

Quote:

Originally Posted by jasycz28

The AFR was taken in the spot of the rear O2 sensor. If I ever get my Fesler dual gauge pod (on back order) I will pull my midpipe and get the O2 bung welded in for my wideband.

Sorry about the back order status. We are desperately working on getting these orders fulfilled.

Rob

slickmetal · 06-11-2011, 11:15 PM

He showed some nice gains at the track last night...the DA was very high and it was very warm. I cant comment for him if he was happy or not...

05-13-2011, 12:12 AM	#1
jasycz28 I don't understand Drives: 2010 Camaro SS Join Date: Nov 2010 Location: Germany Posts: 738	Whipple AF ratio goes rich at 5500 Mods - Whipple. Wondering if anyone else has seen this? I was getting my dyno tune today and every pull the AF ratio dropped to about 9 at 5500. So we through back in the whipple tune same thing. My tuner tried everything even taking fuel away after 5500 and no fix. Could this be the MAF sensor? Maybe I have the weak one? __________________ "JSick" 2010 Camaro 2SS

05-13-2011, 11:11 PM	#2
jasycz28 I don't understand Drives: 2010 Camaro SS Join Date: Nov 2010 Location: Germany Posts: 738	Well I checked and I have the "good" MAF part number. Any ideas? __________________ "JSick" 2010 Camaro 2SS

05-17-2011, 05:48 AM	#7
hoffmk2003 The Hof Drives: 2010 IOM Camaro 2SS/RS Join Date: Jan 2010 Location: Jamestown, RI Posts: 836	Are you doing a Maf only tune or SD tune? I would suggest disabling some of the CAT overtemp, DFCO and all other fuel modifiers while tuning to try to narrow it down. It may help to do a maf only tune to start to eliminate some of the VE stuff as a possible source of the problem. Just keep the tune on the rich side as insurance. Ken __________________ #6 Bolt on Fast List...best ET 12.01@117 mph http://www.streetfire.net/video/best...ro_2240734.htm

06-07-2011, 07:06 PM	#12
jasycz28 I don't understand Drives: 2010 Camaro SS Join Date: Nov 2010 Location: Germany Posts: 738	The issue is fixed.... I went to a dynojet and had no problems. The problem was something between the Camaro and the loaded mustang dyno. Here are my numbers. After a few tweeks on 91 octane it put down 570hp and 517tq. On 100 octane it put down 585hp and 537tq. This was done with the 90 degree phoenix heat around 10:00 AM. Mods are whipple and muffler delete 91 Octane 100 Octane __________________ "JSick" 2010 Camaro 2SS

06-11-2011, 11:15 PM	#19
slickmetal Drives: 2012 IBM 2SS/RS L99 Join Date: Feb 2011 Location: AZ Posts: 317 View My Garage	He showed some nice gains at the track last night...the DA was very high and it was very warm. I cant comment for him if he was happy or not... __________________ CURRENT: 2012 2SS/RSS A6/L99 - Blue w/Silver Stripes SOLD SOLD SOLD 2011 Camaro SS/RS A6/L99 - Red Jewel Tintcoat 12.92@108 (@ SIR DA 5000+) Performance Mods: Muffler Delete, Dynatech SuperMAXX LT Headers, Hi-Flo Cats, C.A.I, Inc CAI, Dynomax Ultra Flo Xpipe, VMAX Ported TB Appearance Mods: Smoked Taillights/Reverse/Side Marker Lights, Blackout Rear Taillight Bezels, Rear Bowtie Delete, Blackout Front Bowtie, Red Led Footwell Lighting

05-14-2011, 08:06 PM	#3
Slowhawk Account Suspended Drives: 1999 Trans Am Join Date: Jul 2009 Location: Bridgewater,Ma Posts: 1,271	Hard to say but the scanning while making the run should indicate the problem.

05-15-2011, 11:24 PM	#4
Meister@Torq Drives: 2001 Crown Vic Join Date: Oct 2009 Location: Miami Posts: 827	Most likely the Catalyst temperature model is becoming active. There is also additional fueling for Intake Valve temps....not sure what they do in their tunes but those are common unless they are commanding rich at that RPM I suggest finding a new tuner

05-16-2011, 10:52 PM	#6
MECH-ENG Drives: AUSI06 Join Date: May 2011 Location: CA Posts: 15	I have seen cars with perfect VE and MAFs able to be forced rich by other possibly emission related systems. Now while some suggest a new tuner to be the solution I'm sure there are things that even the "experienced" tuners don't know. It's all about the level of engine management understanding the tuners perform by. Hard to know who the truely knowledgable ones are from the ones who can just sell them selves to you well.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Whipple Superchargers from the Largest Volume Install shop in The USA - TORQ!	Erik@Torq	Forced Induction	25	08-07-2012 03:01 PM
Whipple Superchargers from the Largest Volume Install shop in The USA - TORQ!	Erik@Torq	Forced Induction - V8	27	10-24-2011 09:34 AM
Whipple Superchargers from the Largest Volume Install shop in The USA - TORQ!	Erik@Torq	USA - Southeast	12	06-01-2011 07:39 AM
Whipple Superchargers In The House!!!	HP Addicts	Forced Induction - V8	1	04-27-2011 08:26 PM
Air/Fuel Ratio with Whipple SC	zr1gary	Forced Induction - V8	10	03-27-2011 06:52 PM