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Fwi lean code

Old Jan 1, 2011 | 06:08 PM
  #21  
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I agree, get hptuners. The stuff you listed is easy, the hardest thing on there is tuning the maf, but with some knowledge its easy.

I would probably add to that list: lean out commanded PE a/f ratio and change shift points.
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Old Jan 1, 2011 | 06:20 PM
  #22  
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Originally Posted by JDMC5
lean out commanded PE a/f ratio
I havent seen that table? What is it for?
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Old Jan 1, 2011 | 07:07 PM
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It sets the target AFR during high load, open loop operation. (The factory raped to PE table - mine looked like the Rocky Mountains until fixed.) Factory setting gets as rich as ~10.8:1 which is way to rich for best torque.
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Old Jan 1, 2011 | 07:42 PM
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he's right, it's basically for when you floor the car, or close to it.

Where have you seen 10.8:1? The worst I've seen is 12.1:1.
Attached Thumbnails Fwi lean code-pe-table.jpg  
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Old Jan 1, 2011 | 08:32 PM
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Originally Posted by JDMC5
Where have you seen 10.8:1? The worst I've seen is 12.1:1.
Brain fart - 12.1 is correct, still too rich though.

10.8 is for the Subie under boost.

Edit:
Here's the current EQ table - equivalent to 12.8
Fwi lean code-eq-table.jpg
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Old Jan 1, 2011 | 09:08 PM
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Alright the “lean out” thru me off.
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Old Jan 1, 2011 | 09:44 PM
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Yeah as far as I know all the LS4's have the same PE fuel curve. At least all the ones I've seen.

Just remember brian, boosted cars like to run more rich than N/A cars. Should be around 11.0-11.5.
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