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Afr and timing question

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Old Jun 8, 2013 | 10:51 AM
  #41  
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Fuel pressure isn't dropping like it use to. I just need to get out and do some more tuning
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Old Jun 8, 2013 | 11:22 AM
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Those VE values are also sometimes high depending on whether or not the IAT / ECT Charge Bias table has been messed with. Allot of people that are SD end up having to tweek that table a bit to combat lean restarts under heatsoak conditions. Thats still pretty high.

As for your 2+ g/cyl there is no way you are seeing that with your setup currently. For ref. I see in the 1.6x range peak If I recall correctly.
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Old Jun 8, 2013 | 12:50 PM
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Here's one if my older logs
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And I haven't messed with the iat tables. They are all set to 1.00 so there's no change in fueling right now. Once I get it dialed in I will tweak that table to keep my afr where it should be
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Old Jun 8, 2013 | 01:02 PM
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Before I put the procharger on I would see .91-.93 g/cyl at wot. At double the atmospheric pressure wouldn't that about double the amount of air coming in?
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Old Jun 8, 2013 | 03:46 PM
  #45  
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Originally Posted by AndysC3
Before I put the procharger on I would see .91-.93 g/cyl at wot. At double the atmospheric pressure wouldn't that about double the amount of air coming in?
Negative. Multiply your pressure ratio by the efficiency where your compressor is at in its compressor map and subtract the % density lost to heating of the air, then multiply that remaining number by your old max cylinder air mass value.
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Old Jun 8, 2013 | 06:52 PM
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I'm at or below ambiant temps, usually between 70-80*. Would heat still play a big role it that, would spraying the meth change the g/cyl?
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Old Jun 8, 2013 | 08:07 PM
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Your g/s is irrelevant because your ve table is all screwed up. VE is airflow essentially.

For reference, ive seen up to 1.39 g/s iirc at a steady 6-7 psi with a peak of 8.5
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Old Jun 8, 2013 | 08:26 PM
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post up A0014 IAT Multiplier and B4001 Injector Flow Rate tables..

I bet you have the wrong injector settings for those injectors, which is causing your IDC and insane EV table...
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Old Jun 8, 2013 | 08:40 PM
  #49  
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I have the tables that FIC sent with the injectors. And A0014 is set to 1.00 across the table. But I'll post em when I get home on Tuesday.
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Old Jun 8, 2013 | 09:11 PM
  #50  
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Welll setting A0014 to 1.00 across the board is not a wise idea... do a search on EFI live on it...

here is what mine looks like

LABELS IAT VE Multiplier (Factor)
IAT °F {link: SAE.IAT} Value
-40 0.924805
-22 0.934082
-4 0.946045
14 0.958984
32 0.971924
50 0.986084
68 1.000000
86 1.014892
104 1.031006
122 1.047119
140 1.063965
158 1.082031
176 1.101074
194 1.121094
212 1.142090
230 1.164062
248 1.187988
266 1.209961
284 1.235107
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