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Old 03-09-2007, 11:44 PM   #1
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Default Modifying Narrowband output for LC1

I got my LC1 installed finally after sitting on the shelf for a few months, and spent some time tuning my AFPR. Then it occurred to me that I have the ability to modify the narrowband sensor output to tell the ecu whatever I want it to (I.e tell the computer it is running more lean or rich than what is actually happening). So I started to mess around with the settings a bit before it got dark. A typical narrowband sensor outputs [email protected]:1 and [email protected]:1, however I have my ecu seeing [email protected] and [email protected]

The result was less lean tip in and quicker spool time, along with running a bit richer at idle, but i could care less about running rich right now as I just wanna be faster for the autocross tomorrow. Also I ended up tuning the AFPR to run 55-57 psi at idle and the rise adjuster is screwed most of the way in. Air fuel ratios in boost are about 12:1 which is a bit rich for 5 psi, but safe i think.
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Old 03-10-2007, 01:26 AM   #2
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Come on tax return...I can't wait to get my LC-1.
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Old 03-11-2007, 05:38 AM   #3
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Ok i autocrossed the car today (sat. March 10) and it worked so so much better than last time. Power was much more predictable and there was no major bogging. Gas mileage went down quite a bit though as expected.
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Old 03-11-2007, 11:06 AM   #4
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Yup, you could take your adjustments the other way (have it dither about 16:1) and get better economy.
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Old 03-11-2007, 11:10 AM   #5
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I don't know if I'd want to leave the wideband in full-time, but it's a cool idea
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Old 03-11-2007, 11:24 AM   #6
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Why not? *Worst* case scenario is you eventually get a new $50 bosch sensor.

If it's installed properly and not exposed to leaded fuel, it'll last a long time.
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Old 03-11-2007, 11:28 AM   #7
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I 'spose you're right.
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