I'm maxxed out. WTF
Oct 10, 2006, 10:46 AM
#16
Originally Posted by AutoXer
What's your octane number? 255?
I can't see the first pic you posted... not sure what it should be. Post your map.
You should be hitting more than 52% IDC. That's definatly a problem. Matter of fact, I'm surprised you're not way too lean with a value that low.
I can't see the first pic you posted... not sure what it should be. Post your map.
You should be hitting more than 52% IDC. That's definatly a problem. Matter of fact, I'm surprised you're not way too lean with a value that low.
Oct 10, 2006, 10:58 AM
#17
Originally Posted by nj1266
It depends on what part of the rpm he is looking at. At 4000 rpm the IDC @WOT is 56% on the Evo 9 I logged this past weekend. @ 5000 rpm it was 67% and % 6000 rpm it was 77%
Oct 10, 2006, 11:20 AM
#18
Originally Posted by JeffR116
The timing in't aggressive. It's only 6* at 3k-4K rpm. That's with only 20psi of boost.
Are you tweaking timing map high octane #2?
Also, check your IDC at 6500-7000rpm.
I really think your wideband is off because you aren't getting alot of knock. If you where indeed running 12.5 AFR and 6* you would most likely see more knock.
Which wideband is it? Where is the probe? What are your mods?
*I had this same problem while tuning a car on the dyno. I maxed out ecuflash fuel at 7.4 and the wideband *in the tail-pipe* showed 12.5 at peak trq. I eventually cycled the power on the wideband, repositioned it, and it still showed the same. I swapped out the sensor for a new one, and it finally read normal.
Oct 10, 2006, 01:06 PM
#19
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Originally Posted by razorlab
6* at peak torque is pretty aggressive if those AFR's are correct. But, according to your log you are at 5* at 3500.
Are you tweaking timing map high octane #2?
Also, check your IDC at 6500-7000rpm.
I really think your wideband is off because you aren't getting alot of knock. If you where indeed running 12.5 AFR and 6* you would most likely see more knock.
Which wideband is it? Where is the probe? What are your mods?
*I had this same problem while tuning a car on the dyno. I maxed out ecuflash fuel at 7.4 and the wideband *in the tail-pipe* showed 12.5 at peak trq. I eventually cycled the power on the wideband, repositioned it, and it still showed the same. I swapped out the sensor for a new one, and it finally read normal.
Are you tweaking timing map high octane #2?
Also, check your IDC at 6500-7000rpm.
I really think your wideband is off because you aren't getting alot of knock. If you where indeed running 12.5 AFR and 6* you would most likely see more knock.
Which wideband is it? Where is the probe? What are your mods?
*I had this same problem while tuning a car on the dyno. I maxed out ecuflash fuel at 7.4 and the wideband *in the tail-pipe* showed 12.5 at peak trq. I eventually cycled the power on the wideband, repositioned it, and it still showed the same. I swapped out the sensor for a new one, and it finally read normal.
Mods are drop in, mbc, tbe.
I'm almost positive it's not my wideband because I originally had a custom tune by dynoflash, and when I pulled the map that he tuned me for, his fuel map was 7.4s in a lot of the same areas mine is now.
He should have told me that wasn't normal.... but now I know better. I'm 90% sure it's my walbro.
Oct 10, 2006, 03:09 PM
#22
Originally Posted by JeffR116
...
He should have told me that wasn't normal.... but now I know better. I'm 90% sure it's my walbro.
He should have told me that wasn't normal.... but now I know better. I'm 90% sure it's my walbro.
http://www.power-enterprise.co.jp/fuel_pomp.html
Its Denso pump, so it should be better quality, and its 38 mm dia, so it should bolt in with minimal mods. The US distributor says that they can get it for around $220.
Oct 10, 2006, 10:55 PM
#26
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Alright I switched back to my stock IX pump. The Walbro was definitely the culprit of my high AFRs.
I went out and did a run without modifying the map, and got these results.
Note the majority of the run was beyond what the UEGO could read as it is <11.0 AFR. However torque peak hit 11.6 AFR.
Instead of taking the time to retune the entire fuel curve, I copied the high octane fuel map from a friend of mine's flash, and pasted it into my map, without any modification at all. This map was targeting high 11s AFR.
Results below, only a partial run.
Note the high 12s, low 13s AFR numbers. Honestly, this made me think my AEM UEGO is off by as much as a point. If I was really hitting 13.1 AFR, I would have way more than 3 counts of knock recorded. Although I realize with the timing map being different, the AFR result will be different to his map.
CLIFFS: Stock IX > WALBRO, my wideband is off But everything's good now.
I went out and did a run without modifying the map, and got these results.
Note the majority of the run was beyond what the UEGO could read as it is <11.0 AFR. However torque peak hit 11.6 AFR.
Instead of taking the time to retune the entire fuel curve, I copied the high octane fuel map from a friend of mine's flash, and pasted it into my map, without any modification at all. This map was targeting high 11s AFR.
Results below, only a partial run.
Note the high 12s, low 13s AFR numbers. Honestly, this made me think my AEM UEGO is off by as much as a point. If I was really hitting 13.1 AFR, I would have way more than 3 counts of knock recorded. Although I realize with the timing map being different, the AFR result will be different to his map.
CLIFFS: Stock IX > WALBRO, my wideband is off But everything's good now.
Oct 11, 2006, 12:16 AM
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Jeff - As i indicated in my pm to you, yes the UEGO is very inaccurate. You must have the older Uego which cips at <11.0. Glad you got your issues resolved though!
Oct 11, 2006, 06:28 AM
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The UEGO claims an accuracy of +-0.1, just like all the other gauges out there. Just because it's calibrated from the factory (there's a laser-burned resistor in the sensor connector harness, unique to each sensor) doesn't mean it's bad. Of course, if you have an old sensor, then that is a problem (for any brand).
The idea that your tuner saw this fuel pump problem and just maxed your fuel tables out without telling you about it is a real joke. WTF!? I mean, forget about all the advanced timing vs. lean AFR debates.. not telling you was simply irresponsible!
The idea that your tuner saw this fuel pump problem and just maxed your fuel tables out without telling you about it is a real joke. WTF!? I mean, forget about all the advanced timing vs. lean AFR debates.. not telling you was simply irresponsible!
Oct 11, 2006, 07:47 AM
#29
Originally Posted by Rob W.
The UEGO claims an accuracy of +-0.1, just like all the other gauges out there. Just because it's calibrated from the factory (there's a laser-burned resistor in the sensor connector harness, unique to each sensor) doesn't mean it's bad. Of course, if you have an old sensor, then that is a problem (for any brand).
Oct 11, 2006, 07:55 AM
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Since the method of calibration is different, I'm not sure you can make a direct comparison between the free-air type of cals used on most sensors and the factory cal'ing done on the AEM. However, according to my manual, the spec on the sensor is: 80,000km nominal on unleaded fuel, accuracy of +-0.7%. (I assume that's a percentage of Lambda, not AFR)