Riddle me this... Strange IDC jump
08-27-2012, 12:13 AM
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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?
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?
