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03-10-2007, 05:43 PM | #1 |
Scooby Newbie
Member#: 79402
Join Date: Jan 2005
Chapter/Region:
NWIC
Vehicle:'05 STi |
Stock sti wideband W/enginunity
So i have been doing some data logging with enginuity on my 05 sti and have noticed that there is a option to log widebad o2. Is this accurate enough to tune from. I have a stock ecu with 3'' tbe catless and a perrin o2 simulator on the rear o2 sensor if that makes any difference.
It appears to accuratly match the targeted afr in the ecu map so what do you think? I have been eyeing the Lc-1 but if this is an option i would choose to save the $ for other purchases. thanks
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03-11-2007, 03:45 AM | #2 |
Scooby Guru
Member#: 6551
Join Date: May 2001
Chapter/Region:
MWSOC
Location: Carol Stream, IL
Vehicle:'01 GC8 Dinged STM '09 Concours 14 ABS Black |
no, the factory widebands are useless under 11.5:1 or so
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03-11-2007, 03:52 AM | #3 |
Scooby Specialist
Member#: 88322
Join Date: Jun 2005
Chapter/Region:
MWSOC
Location: Indianapolis, IN
Vehicle:2009 BMW 135i |
The stock O2 is not accurate under 12.5-13:1 or so in practice. There is a thread going on in the Enguinity forum discussing trying to relocate the stock O2 post turbo to see if it does any better, although I don't think that is a great idea regardless of if it makes it accurate.
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03-11-2007, 04:06 AM | #4 | |
Scooby Guru
Member#: 6551
Join Date: May 2001
Chapter/Region:
MWSOC
Location: Carol Stream, IL
Vehicle:'01 GC8 Dinged STM '09 Concours 14 ABS Black |
Quote:
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03-11-2007, 06:42 AM | #5 |
Scooby Newbie
Member#: 79402
Join Date: Jan 2005
Chapter/Region:
NWIC
Vehicle:'05 STi |
Thanks for the info. I guess if it sounds to good to be true than it probably is. So back pressure from the header to turbo is what causes the inaccuracy? And the therory on the enginunity forum is that by moving the sensor after the turbo there will be less exhaust pressure and therefore it will be more accurate? So how will the ecu react if you move the sensor since reading will be different and the ecu uses it to check targeted afr?
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03-11-2007, 08:13 AM | #6 | |
Scooby Specialist
Member#: 88322
Join Date: Jun 2005
Chapter/Region:
MWSOC
Location: Indianapolis, IN
Vehicle:2009 BMW 135i |
Quote:
2) see 1 3) I know the delay on my LM-1 WB at the bottom of the downpipe is considerable at idle. Enough that I'm going to guess it will give the ECU a hard time trimming fuel. Honestly, I'd just buy an aftermarket unit like the LC-1. |
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