AFR of 15.0 ? - 2003-04 Mach 1 Registry Owners Club

Hayter25 · 11-16-2007, 05:23 PM

I just got done hooking up my wideband and a C&L. I'm getting a 15.0 afr. Does this sound right with the C&L, o/r h-pipe and borla stingers? This is also with the stock tune but with the rear o2 sensors off of course. I will be taking it to get dyno tuned when I'm done with my N2O install. Just wondering if this afr sounds right and if it will be safe to drive to the dyno. Should I bump up the fuel and if so how much. I'm using a Predator.

2k4mach · 11-16-2007, 05:30 PM

yup c&l should never be installed without a a/f reading to see how the car reacts to it
is this a WOT a/f?

ponygt65 · 11-16-2007, 05:52 PM

Quote:

Originally Posted by 2k4mach

yup c&l should never be installed without a a/f reading to see how the car reacts to it
is this a WOT a/f?

+1

if 15.0 is at idle or first hit of WOT...then I could see it. But if this is WOT @ 2500rpm+, then that is not good, and I wouldnt' wait for your nitrous kit....OR stay below half throttle.

PintoPower · 11-16-2007, 06:24 PM

Where did you install the sensor?

Hayter25 · 11-17-2007, 12:00 AM

I left the guage on the default settings...0-5v. Is there more calibrating that needs to be done? I should have been more specific...15.0 at idle. It spikes harsh when I thrump on it and then kicks back down to 14.6-15.0. The mach is still up on jack stand and will be for a while. I just wanted to ensure that the guage was working. Another thing that I'm not too sure about is the placement of the sensor. It's installed right in the "H" of the pipe. Thought maybe I could get both banks with this position. I don't think that that should be a problem unless I had an exhaust leak which I don't. So should I throw some fuel at it? The next time it will be driven is to the dyno. Any other comments would be appreciated.

ponygt65 · 11-17-2007, 12:42 AM

Quote:

Originally Posted by Mach1Marauder

You two dorks didn't ask if he calibrated his wideband first.

I was at work.......selling lights. Apparently my light was out. LOL

Quote:

Originally Posted by Hayter25

I left the guage on the default settings...0-5v. Is there more calibrating that needs to be done? I should have been more specific...15.0 at idle. It spikes harsh when I thrump on it and then kicks back down to 14.6-15.0. The mach is still up on jack stand and will be for a while. I just wanted to ensure that the guage was working. Another thing that I'm not too sure about is the placement of the sensor. It's installed right in the "H" of the pipe. Thought maybe I could get both banks with this position. I don't think that that should be a problem unless I had an exhaust leak which I don't. So should I throw some fuel at it? The next time it will be driven is to the dyno. Any other comments would be appreciated.

There's one problem.

3150Mach1 · 11-17-2007, 07:22 AM

Quote:

Originally Posted by Hayter25

I left the guage on the default settings...0-5v. Is there more calibrating that needs to be done? I should have been more specific...15.0 at idle. It spikes harsh when I thrump on it and then kicks back down to 14.6-15.0. The mach is still up on jack stand and will be for a while. I just wanted to ensure that the guage was working. Another thing that I'm not too sure about is the placement of the sensor. It's installed right in the "H" of the pipe. Thought maybe I could get both banks with this position. I don't think that that should be a problem unless I had an exhaust leak which I don't. So should I throw some fuel at it? The next time it will be driven is to the dyno. Any other comments would be appreciated.

You look for readings of 12.5-13.1 at WOT. At idle it will read lean like that.

Hayter25 · 11-17-2007, 12:59 PM

So why would the position of the sensor mess things up? On the mac pipe there is even a place that looked to be made just for that bung. Just trying to understand

2k4mach · 11-17-2007, 01:23 PM

so go have a new bung put in the pipe like everyone else

PintoPower · 11-17-2007, 01:32 PM

wideband o2 bung placement

copy and past into google or yahoo.

sampson101st · 11-18-2007, 07:26 AM

it might be just me, but the H in the pipe would seam to act like a scavange. put it in the direct flow of the exhaust.
and yes, i agree, at idle it will read high. but under WOT it should go down, as posted above.

1fast03mach · 11-18-2007, 11:56 PM

My idle is around 14-14.5 and wotis at 12.5 and way to rich so i'm going to try 13.,i think a lot of the cars are runin high 12- 13 on the a/f......

sampson101st · 11-18-2007, 11:59 PM

yep, could go up a little. 12.7 - 12.8,

wutang61 · 11-19-2007, 01:37 AM

Quote:

Originally Posted by sampson101st

yep, could go up a little. 12.7 - 12.8,

11-16-2007, 05:23 PM	#1
Hayter25 Juiced Join Date: Dec 2004 Location: Tacoma, WA. Posts: 151	AFR of 15.0 ? I just got done hooking up my wideband and a C&L. I'm getting a 15.0 afr. Does this sound right with the C&L, o/r h-pipe and borla stingers? This is also with the stock tune but with the rear o2 sensors off of course. I will be taking it to get dyno tuned when I'm done with my N2O install. Just wondering if this afr sounds right and if it will be safe to drive to the dyno. Should I bump up the fuel and if so how much. I'm using a Predator. __________________ Sean Vogtland Springs Tokico 5-way shocks/struts Steeda 4-bolt C/C plates MM adj. LCA's MGW shift Predator FRPP Aluminum driveshaft 31 spline Moser axles w/ 3" studs FRPP diff FRPP 4:30's IAC restrictor plate Borla Stingers MAC off-road h-pipe C&L CAI FR500 Anthracite 18x9, 18x10 Nitto NT-01 275/35/18 front Nitto 555R 305/35/18 rear Zex 125 shot misc. appearance mods

11-16-2007, 05:30 PM	#2
2k4mach LuLz Join Date: Dec 2003 Location: Cedar Park, TX Posts: 19,294	Re: AFR of 15.0 ? yup c&l should never be installed without a a/f reading to see how the car reacts to it is this a WOT a/f? __________________ 11 Sterling gray GT500 coupe 08 Silver Z06 1058rwhp/1073rwt @ 15psi 14 Silver Q50S Vortech blown 04 DSG Mach 1 (stolen) 03 OW Mach 1 (sitting in a field rotting away)

11-16-2007, 06:24 PM	#4
PintoPower Registered User Join Date: Aug 2007 Location: Llano Estacado Posts: 131	Re: AFR of 15.0 ? Where did you install the sensor?

11-17-2007, 12:00 AM	#5
Hayter25 Juiced Join Date: Dec 2004 Location: Tacoma, WA. Posts: 151	Re: AFR of 15.0 ? I left the guage on the default settings...0-5v. Is there more calibrating that needs to be done? I should have been more specific...15.0 at idle. It spikes harsh when I thrump on it and then kicks back down to 14.6-15.0. The mach is still up on jack stand and will be for a while. I just wanted to ensure that the guage was working. Another thing that I'm not too sure about is the placement of the sensor. It's installed right in the "H" of the pipe. Thought maybe I could get both banks with this position. I don't think that that should be a problem unless I had an exhaust leak which I don't. So should I throw some fuel at it? The next time it will be driven is to the dyno. Any other comments would be appreciated. __________________ Sean Vogtland Springs Tokico 5-way shocks/struts Steeda 4-bolt C/C plates MM adj. LCA's MGW shift Predator FRPP Aluminum driveshaft 31 spline Moser axles w/ 3" studs FRPP diff FRPP 4:30's IAC restrictor plate Borla Stingers MAC off-road h-pipe C&L CAI FR500 Anthracite 18x9, 18x10 Nitto NT-01 275/35/18 front Nitto 555R 305/35/18 rear Zex 125 shot misc. appearance mods

11-17-2007, 12:59 PM	#8
Hayter25 Juiced Join Date: Dec 2004 Location: Tacoma, WA. Posts: 151	Re: AFR of 15.0 ? So why would the position of the sensor mess things up? On the mac pipe there is even a place that looked to be made just for that bung. Just trying to understand __________________ Sean Vogtland Springs Tokico 5-way shocks/struts Steeda 4-bolt C/C plates MM adj. LCA's MGW shift Predator FRPP Aluminum driveshaft 31 spline Moser axles w/ 3" studs FRPP diff FRPP 4:30's IAC restrictor plate Borla Stingers MAC off-road h-pipe C&L CAI FR500 Anthracite 18x9, 18x10 Nitto NT-01 275/35/18 front Nitto 555R 305/35/18 rear Zex 125 shot misc. appearance mods

11-17-2007, 01:23 PM	#9
2k4mach LuLz Join Date: Dec 2003 Location: Cedar Park, TX Posts: 19,294	Re: AFR of 15.0 ? so go have a new bung put in the pipe like everyone else __________________ 11 Sterling gray GT500 coupe 08 Silver Z06 1058rwhp/1073rwt @ 15psi 14 Silver Q50S Vortech blown 04 DSG Mach 1 (stolen) 03 OW Mach 1 (sitting in a field rotting away)

11-17-2007, 01:32 PM	#10
PintoPower Registered User Join Date: Aug 2007 Location: Llano Estacado Posts: 131	Re: AFR of 15.0 ? wideband o2 bung placement copy and past into google or yahoo.

11-18-2007, 07:26 AM	#11
sampson101st 04 mach1 Join Date: Jul 2005 Location: dothan Posts: 850	Re: AFR of 15.0 ? it might be just me, but the H in the pipe would seam to act like a scavange. put it in the direct flow of the exhaust. and yes, i agree, at idle it will read high. but under WOT it should go down, as posted above. __________________ DSG 04 mach, Tuned @ Panhandle Performance NA-292rwhp/302rwtq corrected Spray- 394rwhp/405rwtq corrected 00 lightning, paid for.12lbs boost. 03 lightning, paid for.10lbs boost.

11-18-2007, 11:56 PM	#12
1fast03mach Registered User Join Date: Mar 2007 Location: Discovery Bay,CA Posts: 513	Re: AFR of 15.0 ? My idle is around 14-14.5 and wotis at 12.5 and way to rich so i'm going to try 13.,i think a lot of the cars are runin high 12- 13 on the a/f...... __________________ ROB: 03 A.B MACH 1 5SPD MAGNAFLOW AFTERCAT: BASSANI CATTED X PIPE: JLT RAI: PHP SPACER: 390 GEARS: X CAL II W/CUSTOM TUNE: WHEELS CHROME BULLITTS: 18X9 275/35 18X10 295/35: (MM SUSPENSION MODS): BILSTEIN HD STRUTS/SHOCKS: 350#FRONT COILOVERS: CASTER/CAMBER PLATES: FRONT LCA: SWAYBAR END LINKS: STEERING RACK BUSHINGS: K MEMBER BRACE: REAR HD ADJUSTABLE LCA: TORQUE ARM: PANHARD BAR: TROQUE ARM SPRINGS 370-440#"S: SUBFRAME CONNECTORS:

11-18-2007, 11:59 PM	#13
sampson101st 04 mach1 Join Date: Jul 2005 Location: dothan Posts: 850	Re: AFR of 15.0 ? yep, could go up a little. 12.7 - 12.8, __________________ DSG 04 mach, Tuned @ Panhandle Performance NA-292rwhp/302rwtq corrected Spray- 394rwhp/405rwtq corrected 00 lightning, paid for.12lbs boost. 03 lightning, paid for.10lbs boost.

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