http://www.fi2000r.com/page.php?page=41
Every car is different but I try to keep my afr 13.0-13.4
Never trust the butt dyno.lol
I ran 12.8afr past 5k until a monte carlo ss stayed next to me
Bumped it up to 13.6ish & he didnt have a chance (@ the track).
Good luck
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Weird things happen when drawings come to life. Old setup=3.5/ssim/H/Y/C/Arp stuff/Vlsd/3"exhaust/NX (whats in your nozzle?)
217whp 209wtq N/A 13.9@100.27
???whp ???wtq Nitrous
12.9@111.81 Dragradials http://www.youtube.com/watch?v=9IizQezbiBA
3080 Lbs with driver (notarized proof)10/2008
Around 3000 with driver (present)
Dan and I tunned my car around 14.6. After reading those articles I'm worried about engine temps. Hopefully I get to a dyno soon and run on a lower AFR to compare. Thank god for a Wideband, save's paying $160/hr lol.
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2000 Maxima SE| Tein S-Techs/Illumina struts | Stillen Front lip | Enkei 18" RSV's | Blacked out headlights | Brembo cross-drilled rotors | Cammed/mildly ported DEK swap| Cattman Headers | Greddy EU | Innovate WBO2| VIS CF Hood|Budget B Pipe |WAI | Maxxtunning VB
Dan and I tunned my car around 14.6. After reading those articles I'm worried about engine temps. Hopefully I get to a dyno soon and run on a lower AFR to compare. Thank god for a Wideband, save's paying $160/hr lol.
Kev I replied to your email, you're getting WOT mixed up with closed loop cruise/partial throttle I think. Under WOT I tuned your base file for mid-high 12's. You should see mid 14's most of the rest of the time, which is normal and completely safe. If you're seeing 14's under WOT then you have an issue that's sprung up, such as a fuel pump that's not keeping up, I know I had to eventually change mine out with that engine.
I just bumped up my AF from 12.0 @ WOT to 13.5 @ WOT... and it made a HUGH diffrence it feels like a whole diffrent car... my buddies car wrx(modded) use to stay neck and neck with me (at the track ofcoarse) and now i leave him by 2 cars ! lol...
Cant wait to get on a dyno and see how it will do with 14.0 A/F ...
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2k3 6MT .
FOR SALE- 2003 Maxima 6SPEED, Grey on Black Leather, 45k Miles. NY. PM ME. Stock.
Kev I replied to your email, you're getting WOT mixed up with closed loop cruise/partial throttle I think. Under WOT I tuned your base file for mid-high 12's. You should see mid 14's most of the rest of the time, which is normal and completely safe. If you're seeing 14's under WOT then you have an issue that's sprung up, such as a fuel pump that's not keeping up, I know I had to eventually change mine out with that engine.
Excuse my stupidty and lack of sleep. For some reason when reading through all of this my mind was blanking out "WOT" LOL.
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2000 Maxima SE| Tein S-Techs/Illumina struts | Stillen Front lip | Enkei 18" RSV's | Blacked out headlights | Brembo cross-drilled rotors | Cammed/mildly ported DEK swap| Cattman Headers | Greddy EU | Innovate WBO2| VIS CF Hood|Budget B Pipe |WAI | Maxxtunning VB
I did notice the car got alot stronger from me making it run a little leaner then before..14 @wot..... but while reading around i noticed a few peopel running 14.5 @ wot.. and getting good results on the 3.5L .... isnt 14.5 a little to LEAN for this motor ?
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2k3 6MT .
FOR SALE- 2003 Maxima 6SPEED, Grey on Black Leather, 45k Miles. NY. PM ME. Stock.
I did notice the car got alot stronger from me making it run a little leaner then before..14 @wot..... but while reading around i noticed a few peopel running 14.5 @ wot.. and getting good results on the 3.5L .... isnt 14.5 a little to LEAN for this motor ?
It is WAY lean to make optimal power. You noticed it where, on the butt dyno? Please don't be fooled... 14's will not give you optimal power (torque actually) on an N/A engine running gasoline. That I am 100% certain of, and if you don't believe me go study up on engine dynamics/combustion science and read some books on tuning. If you see a positive change (with hard data on a dyno) it's most likely that something else changed at the same time, likely air temps/heat soak, or air density (e.g. - a lot of dyno shops don't exhaust the exhaust properly and it recirculates and mixes back into the air in the dyno cell, reducing the charge density, almost like an EGR effect but not as concentrated).
I do believe that you saw a gain going from 12.0 to 13.5 because 12.0 is too rich, but going from say 13.0 to 13.5 is a really negligible difference. The bulk of the gain comes from getting out of the low 12's and at least to the mid-high 12 area. I have seen this myself tuning on a dyno, and not just on my own car.
It is WAY lean to make optimal power. You noticed it where, on the butt dyno? Please don't be fooled... 14's will not give you optimal power (torque actually) on an N/A engine running gasoline. That I am 100% certain of, and if you don't believe me go study up on engine dynamics/combustion science and read some books on tuning. If you see a positive change (with hard data on a dyno) it's most likely that something else changed at the same time, likely air temps/heat soak, or air density (e.g. - a lot of dyno shops don't exhaust the exhaust properly and it recirculates and mixes back into the air in the dyno cell, reducing the charge density, almost like an EGR effect but not as concentrated).
I do believe that you saw a gain going from 12.0 to 13.5 because 12.0 is too rich, but going from say 13.0 to 13.5 is a really negligible difference. The bulk of the gain comes from getting out of the low 12's and at least to the mid-high 12 area. I have seen this myself tuning on a dyno, and not just on my own car.
Well i personally have not tunned my car to 14.5... but i read that 96sleeper had his car on 14.5-7 and was makign decent power... thats why i asked. Im cureently anywhere from 13.3-14.2 under WOT... i cant get it steady ..Maybe because i have cams ? not sure... i just dont have time right now to hit a dyno and tune like id want to.
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2k3 6MT .
FOR SALE- 2003 Maxima 6SPEED, Grey on Black Leather, 45k Miles. NY. PM ME. Stock.
Well i personally have not tunned my car to 14.5... but i read that 96sleeper had his car on 14.5-7 and was makign decent power... thats why i asked. Im cureently anywhere from 13.3-14.2 under WOT... i cant get it steady ..Maybe because i have cams ? not sure... i just dont have time right now to hit a dyno and tune like id want to.
That is where my car was before I tuned it. It was way too lean for power and safety. I found max power around 13.0 to 13.2 just like most everyone. I think I remember picking up 4-5 hp from adding fuel to bring it down to a good A/F.
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96 Pebble Beige SE
14.2@97mph as an auto
13.7@102mph as a 5spd
12.9@106mph after 3.5 swap
11.6@120mph with the S/C Visit here for mods and dyno.
This has been answered before, take it to a dyno and see what works best for you.
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Linear Mode
