Cant lean out AFR
11-04-2007, 11:10 PM
#1
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Join Date: Dec 2002
Posts: 37
Cant lean out AFR
Hey guys, wondering if someone could help me out. I am having trouble leaning out my AFR at WOT. I have mototron 60# inj, with a stock intank pump and a procharger inline booster pump. Currently i have tuned in my inj constant as 60.01 and my cylinder volume has been changed for the 383(778.45). Right now i am running an open loop tune and have the 95 and 100 kpa afr set to 11.8 in the table, i zeroed out my pe vs rpm and pe vs coolant temp, but still am showing 11.1-11.0 at wot on my innovative lc1 with xd16 gauge. I have 24* of total advance in the 95 - 100 kpa zone. What can i do to lean it out to the 11.5 - 11.7 range? Should i put negative numbers in the pe vs rpm? Does the ve table work if the maf is enabled? If so i would assume i should increase the ve table in the 95 - 100 kpa region to 100% because when air is being forced into the motor it usually excedes 100% ve correct? Please help LOL i have 1 million thoughts in my head.
Last edited by b4cz2896; 11-04-2007 at 11:14 PM. Reason: figured out cylinder volume
11-05-2007, 08:58 AM
#2
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Join Date: Jul 2004
Location: MI
Posts: 1,174
Zero the pe vs, temp table and drop the pe vs, rpm cal curve. It should lean the afr. Usually a drop of 10 units on the pe_v_rpm curve will lean the afr 1 point (according to L J - see his website acceleronics.com for write-up).
For open loop mode only, try raising the afr cal unit in the 85 to 100 kpa range over 3500 rpm. I assume you have a wideband afr device. I use a dynojet.
I run closed loop mode for low speed fueling, and, have adjusted the MAF cal and MAP blm update trigger.
Hope this helps. B. (97ss obd2 Lt1 383 72#Inj - D1 M6)
For open loop mode only, try raising the afr cal unit in the 85 to 100 kpa range over 3500 rpm. I assume you have a wideband afr device. I use a dynojet.
I run closed loop mode for low speed fueling, and, have adjusted the MAF cal and MAP blm update trigger.
Hope this helps. B. (97ss obd2 Lt1 383 72#Inj - D1 M6)
11-06-2007, 01:27 PM
#3
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Thread Starter
Join Date: Dec 2002
Posts: 37
Zero the pe vs, temp table and drop the pe vs, rpm cal curve. It should lean the afr. Usually a drop of 10 units on the pe_v_rpm curve will lean the afr 1 point (according to L J - see his website acceleronics.com for write-up).
For open loop mode only, try raising the afr cal unit in the 85 to 100 kpa range over 3500 rpm. I assume you have a wideband afr device. I use a dynojet.
I run closed loop mode for low speed fueling, and, have adjusted the MAF cal and MAP blm update trigger.
Hope this helps. B. (97ss obd2 Lt1 383 72#Inj - D1 M6)
For open loop mode only, try raising the afr cal unit in the 85 to 100 kpa range over 3500 rpm. I assume you have a wideband afr device. I use a dynojet.
I run closed loop mode for low speed fueling, and, have adjusted the MAF cal and MAP blm update trigger.
Hope this helps. B. (97ss obd2 Lt1 383 72#Inj - D1 M6)
11-07-2007, 07:06 PM
#4
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Join Date: Oct 2006
Location: Seattle area
Posts: 477
A word of caution relating to the PE vs RPM table - if you go too high or too low, it seems to "wrap around". I was tuning a 383 Stroker on the dyno, and went lower then about -15, and all the sudden the motor went pig rich at WOT. Generally speaking if you are getting that far off with this table, there are other constants that need to be changed, like IFR, or the MAF calibration table (I fixed the stroker motor by raising the IFR 10% to lean it out, then dialed in the PE table again).
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