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Riddle me this... Strange IDC jump

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Old 08-27-2012 | 01:13 AM
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Default Riddle me this... Strange IDC jump

Ok so it just dawned on me.*
First night i put the turbo on i was out checkin the tune and the IDC was 93% at 5700rpms, 11.2AFR, 5.2psi.*
I got my methanol hooked up and AFR was in the 10.3ish range. I leaned it out so its roughly 11.0.*
Now my IDC is 120%. But nothing changed except i leaned the boost VE out so the AFR would be close to targeted.*

Why would it change so much when i was expecting it to go down. I did add about 4-5* timing. Maybe thats it?*

Then at 5850-6000 it goes from 11.0-11.2 to 12.4s, so i added fuel on the boost VE table. It still had a lean spike so i set it to shift at 5200 since the AFR looked good there.*

What gives?
Old 08-27-2012 | 04:55 AM
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Hows fuel pressure?
Old 08-27-2012 | 09:09 AM
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I gotta check.
Old 08-27-2012 | 10:26 AM
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IDC is based on the IFR table and the pulsewidth, not much else. At WOT a weak pump will show as lean, not higher IDC. As far as your question, im not really sure...
Old 08-27-2012 | 10:32 AM
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What does your IAT adder table look like? Think that's what it's called...
Old 08-27-2012 | 11:05 AM
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IAT fuel or Timing?
Old 08-27-2012 | 11:05 AM
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if i can find my jumpdrive, ill upload the tune.
Old 08-27-2012 | 11:12 AM
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Fuel

You use hpt or efi?
Old 08-27-2012 | 11:29 AM
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ill have to look..
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Old 08-27-2012 | 11:50 AM
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This has me stumped, in for the results.

If you unhook the meth, and put your fuel back, the IDC goes down?



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