Originally Posted by theDreamer CobbTuning.com - AccessPORT > Tune > Self-Tuning - Cobb PC software. never noticed that, i <3 you.
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03-25-2010, 05:11 PM | #106 (permalink) | |
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03-25-2010, 05:12 PM | #107 (permalink) |
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I never had them read on a dyno, just seen what they were when I plugged in my AP, never checked them at WOT because the numbers fluctuate so rapidly, im sure I could probably datalog and pull it up on my laptop if i wanted to.
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03-25-2010, 05:15 PM | #108 (permalink) |
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I'll ask AA how to logg that on the device. I dont think you need a computer, I think you can logg it on the device and then transfer it somehow.
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03-25-2010, 05:19 PM | #109 (permalink) |
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Oh i know it logs on the device, the box it comes in comes with a pc to device plug so you can transfer the data.
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03-26-2010, 01:55 PM | #111 (permalink) |
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Did some datalogging today, here are some numbers i'd like you guys to take a look at, I did a few 1st gear WOT runs just to get an idea of what my AFR's were looking like, take a look.. The Mid 14's at 6500rpms make me nervous..
Columns: 1. Seconds 2. Coolant temp 3. Intake temp 4. Ignition Advance 5. Oil Temp 6. RPMs 7. MAF 8. Vehicle speed 9. AFR 10. AF Correction
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03-26-2010, 02:03 PM | #112 (permalink) | |
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If it helps you at all, here's my latest dyno showing AFR, and this was after getting a tune so the AFR is adjusted to where it ought to be.
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"There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) | 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf. |
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03-26-2010, 02:08 PM | #113 (permalink) | |
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In addition, first gear is a poor one to get decent logs from. You really want the car under load. Suggest 3rd gear or higher if you have the room.. |
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03-26-2010, 02:09 PM | #114 (permalink) |
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I missed the part about being in 1st gear.
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"There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) | 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf. |
03-26-2010, 02:19 PM | #115 (permalink) | |
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However, like Tony said...if you change the location and process of how the car reads the air ratios, you are at risk of running lean because the car may not be adjusting the fuel ECU map correctly. You have two ways of determining this, either pull your plugs and read them (basically if you are running lean you will see a whiteish plug) or get to a dyno and get an a/f reading. If you are running lean, the car "should" pull timing which means you are losing power. Don't make your mods work against you! You will not be able to put more power using an intake, HFC, and CBE IF the car can adjust air/fuel correctly. If you go the supercharger/turbo route of course the game changes quite a bit. So, for those of you going with the G3, you should at least get your air/fuel readings to make sure you're not going lean. Better safe than sorry!
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03-26-2010, 02:29 PM | #116 (permalink) |
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Oh ok, i'll try to get it out on the highway after work and post my results. Sorry for the shytty excel numbers, i'd sort the numbers to descending but I dont have the full version
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03-26-2010, 02:38 PM | #117 (permalink) | |
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I started off with a CBE and HFC. I never dyno'd before this, only after, so my baseline is with the CBE and HFC. Baseline: Max = 291.7whp. My only mods were the Stillen cat-back exhaust and the Berk HFCs. Then I went and added the G3 intakes. After: Max = 306.4whp. Net gain = 14.7whp. Then I added headers. This first graph shows HP and A/F: This one shows torque: So I should be running really lean now, right? And when I get a tune and get my AFR adjusted, my HP should go back down as a result of the AFR correction, right? But it doesn't. And keep in mind that AFR correction is pretty much the only thing a tune is good for right now, because timing adjustments just get bounced back, so it's not like we're offsetting HP loss via AFR correction with HP gain via timing advancement. Sharif at Forged Performance did my tune, and he made sure the AFR is where it ought to be. Final number: 318.1 Unless I'm missing something, it does not appear that my gains from the G3 intake were at any point negated by AFR correction, which leads me to conclude that the gain I got from the G3 was legit, and not simply because it caused my engine to run lean.
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"There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) | 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf. |
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03-26-2010, 05:26 PM | #119 (permalink) |
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ouch, somebody just got
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03-26-2010, 06:10 PM | #120 (permalink) |
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so semtex is your AFR starting at 14 and then at high rpms going down to around 12? I thought it was suppose to go up when you get on it? When I was checking my AFR yesterday it would flucate alot but always seemed to settle around 14.xx, is this good or bad?
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