08-07-2016, 07:13 AM | #1 |
Drives: SS 6 speed of course Join Date: Jan 2016
Location: Hilo, HI
Posts: 4,320
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wide band target A/F at wot
I have my wideband set to A/F, I know I should do the 1.0V lambda thing, but I'm an oldman. I have a good idea of my A/F thru the range. Basically I took GMs injection curve and add 10 percent across the board. A normal WOT run now is like 11.6 A/F off idle to 12.2 mid range to 12.5 on the top end. I'll start leaning it out, especially on the low end. My question is what should be the target A/F for max power. I would guess the modern trend on 10 percent ethanol is leaner than the old fashion 12.5 target. Any thoughts. This as 12.0 to 12.7, grunt method works pretty well I guess.
http://www.hotrod.com/articles/wideband-oxygen-sensor/ I change the gauge to lambda today .8523 rich to .9020 lean, max power.
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Forged short block, large duration sub .600 lift Cam Motion cam, 7200 RPM fuel cut, Pray Ported Heads, 3.85 pulley D1X, stage II intercooler, DSX secondary low side, DSX E85 sensor, Lingenfelter big bore 2.0 pump, ported front cats, 60608 Borla, LT4 injectors, ZL1 1LE driveshaft and Katech ported TB, ported MSD intake, BTR valvetrain, ARP studs, ProFlow valves, PS4 tires.
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08-10-2016, 11:40 AM | #2 | |
Drives: BLUE CAMARO ZL1 1LE M6 Join Date: Jun 2009
Location: ON THE DYNO WATERBURY CT.
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Quote:
As a guide only you would shoot for .85 lambda Naturally aspirated or .78 Lambda for supercharged applications.
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08-23-2016, 02:18 PM | #3 |
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Why lamda instead of AFR? I personally prefer AFR, makes more sense to me.
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08-23-2016, 03:23 PM | #4 | |
Drives: BLUE CAMARO ZL1 1LE M6 Join Date: Jun 2009
Location: ON THE DYNO WATERBURY CT.
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Quote:
I know what you mean I used AFR for years then I finally made the switch. Also when tuning the Math is easier with Lambda target is .85 and your at .90 you can add 5.5% fuel and be right on. Stoich value changes with fuel type and manufacturer for example. Race Gas Stoich Ratings Sunoco MO2X UL 14.5 Sunoco 260 GTX 14.4 Sunoco 260 GT 13.9 Sunoco 260 GT Plus 13.7 Sunoco Standard 14.8 Sunoco Supreme 14.9 Sunoco MO2X 14.5 Sunoco HCR Plus 14.8 Sunoco Maximal 15.0 Sunoco MaxNOS 14.9 Turbo Blue Unleaded (100 octane) -13.9 Turbo Blue Unleaded Plus (104 octane) - 13.7 Turbo Blue 110 - 14.7 Turbo Blue Advantage - 14.9 Turbo Blue Extreme - 15.0 VP Street Blaze 100 - 14.16 VP C10 -14.53 VP C16 - 14.77 VP 110 - 15.09 VP MS109 - 13.41
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Celebrating 37 years Performance parts, Installation, Fabrication, Dyno tuning, Remote custom tuning, and alignments. 203-753-7223 Waterbury CT. 06705 email tedj@jannettyracing.com |
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08-23-2016, 03:37 PM | #5 |
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Very informative, thanks Ted.
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08-24-2016, 01:20 PM | #6 |
Drives: BLUE CAMARO ZL1 1LE M6 Join Date: Jun 2009
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Celebrating 37 years Performance parts, Installation, Fabrication, Dyno tuning, Remote custom tuning, and alignments. 203-753-7223 Waterbury CT. 06705 email tedj@jannettyracing.com |
08-24-2016, 04:33 PM | #7 |
Drives: SS 6 speed of course Join Date: Jan 2016
Location: Hilo, HI
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OK so my 5% over rich grunt method was go figure about 5% over rich, it needs to be richened about 3% in the lower RPM over stock and mid range is almost spot on, and stock above 4500 is actually slightly rich. I have Mishmoto CAI, MSD intake, 6 LE front cat bypass.
Now my question can I record my data runs by just pushing the record / stop button on the HP tuner? So far I've always use my PC. I tried a couple of times but could not find any log file? My Hondata unit looks just like this and it records just fine and I could find them. Dunno.
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Forged short block, large duration sub .600 lift Cam Motion cam, 7200 RPM fuel cut, Pray Ported Heads, 3.85 pulley D1X, stage II intercooler, DSX secondary low side, DSX E85 sensor, Lingenfelter big bore 2.0 pump, ported front cats, 60608 Borla, LT4 injectors, ZL1 1LE driveshaft and Katech ported TB, ported MSD intake, BTR valvetrain, ARP studs, ProFlow valves, PS4 tires.
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08-28-2016, 06:49 PM | #8 |
Drives: 2016 Camaro SS Join Date: Jan 2016
Location: Mount Dora, FL
Posts: 779
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Oldman have you recalibrated your MAF?
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08-30-2016, 11:32 AM | #9 |
Drives: SS 6 speed of course Join Date: Jan 2016
Location: Hilo, HI
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I have not... I'm bad. I have just been adjusting the a/f ratio on the PE table. I have to be lean over stock table. I had to be rich with the CAI CAI or it would throw lean codes.
I'm about 10% lean in the mid range that is -12 points or say 1.100 to 1.088 and I'm about 12% lean from 4500 RPM up. I'm tuning via wideband. In general I'm from 12.00 to 12.60 bellshape with a mid point of 12.35, I could keep fooling with it get it slightly leaner. Dunno. I'll send you a log if you want to have a look, any help is appreciated. Will going with your table on the MAF hose the PE enrichment? Mishmoto Intake, MSD manifold, L6 front Cat bypass, HP tuner
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Forged short block, large duration sub .600 lift Cam Motion cam, 7200 RPM fuel cut, Pray Ported Heads, 3.85 pulley D1X, stage II intercooler, DSX secondary low side, DSX E85 sensor, Lingenfelter big bore 2.0 pump, ported front cats, 60608 Borla, LT4 injectors, ZL1 1LE driveshaft and Katech ported TB, ported MSD intake, BTR valvetrain, ARP studs, ProFlow valves, PS4 tires.
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08-30-2016, 11:54 AM | #10 | |
Drives: BLUE CAMARO ZL1 1LE M6 Join Date: Jun 2009
Location: ON THE DYNO WATERBURY CT.
Posts: 15,225
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Quote:
Set the PE at what you want to see on the wide band and tune the MAF to achieve 0 fuel trims and commanded PE. Ted.
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Celebrating 37 years Performance parts, Installation, Fabrication, Dyno tuning, Remote custom tuning, and alignments. 203-753-7223 Waterbury CT. 06705 email tedj@jannettyracing.com |
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08-30-2016, 01:38 PM | #11 | |
Drives: 2016 Camaro SS Join Date: Jan 2016
Location: Mount Dora, FL
Posts: 779
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Quote:
Tim |
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08-30-2016, 01:39 PM | #12 |
Drives: 2016 Camaro SS Join Date: Jan 2016
Location: Mount Dora, FL
Posts: 779
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Exactly! I would set your LTrims to be 1 or 2% negative. This will keep it from adding extra fuel during WOT.
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08-30-2016, 01:42 PM | #13 | |
Drives: 2016 Camaro SS Join Date: Jan 2016
Location: Mount Dora, FL
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Quote:
Once you get the MAF dialed in you can feel confident future PE changes will be damn close to what you are asking for. |
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08-30-2016, 03:11 PM | #14 |
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Do you guys have to deal with COT protection at all?
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