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Old 03-23-2005, 10:49 PM   #1
StiDreams
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Default Little UTEC help please

Code:
 3035 -11.4 2.4  14  00    00   +44.7    8.0 ECU.   +0.5 ECU.   2.1  14.61 
 3049 -10.4 2.4  15  00    00   +45.5    9.0 ECU.   +0.5 ECU.   2.1  14.08 
 3033  -9.4 2.4  15  00    00   +46.1    9.6 ECU.   +0.5 ECU.   2.2  14.45 
 3052  -7.9 2.4  16  00    00   +45.9   11.1 ECU.   +0.5 ECU.   2.2  14.87 
 3075  -7.1 2.6  22  00    00   +46.0   12.1 ECU.   +0.5 ECU.   2.3  14.15 
 3112  -5.9 2.9  30  10    00   +44.9   13.9 +33.0  +0.1 500.00 2.6  13.84 
 3150  -4.0 3.0  52  10    00   +42.2   17.4 +33.0  +0.1 500.00 2.7  13.72 
 3217  -1.8 3.1  85  10    00   +39.5   20.2 +33.0  +0.1 500.00 2.8  14.05 
 3284  +0.0 3.4 100  20    00   +38.4   23.0 +24.0  +0.1 500.00 3.0  13.87 
 3373  +2.3 3.5 101  20    00   +36.5   25.6 +24.0  +0.1 500.00 3.0  12.78 
 3472  +3.9 3.6 101  30    00   +33.9   29.5 +17.9  +0.1 500.00 3.2  11.96 
 3512  +5.5 3.7 101  40    00   +30.7   34.8 +18.0  -0.1 500.00 3.3  11.39 
 3663  +8.2 3.9 101  50    00   +24.2   38.5 +17.0  -0.1 500.00 3.5  10.86 
 3757 +10.6 4.0 100  70    00   +21.8   44.1 +15.5  -0.3 500.00 3.6  10.62 
 3849 +12.7 4.1 100  70    02   +21.3   45.1 +11.5  -0.3 500.00 3.6  10.62 
 3944 +14.9 4.1 100  80    00   +21.6   45.0  +9.5  -0.4 500.00 3.6  10.65 
 4089 +15.7 4.2 100  80    00   +22.2   45.9  +9.6  -0.5 500.00 3.6  10.59
This is running CA 91 octane in about 60 degrees temps with relatively high humidity (for CA). It's been raining here. You can see that I'm running 15.5 degrees in the 70% column where it knocks. It's not running lean. I going to take some timing and see what it does but is that the right thing to do?
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Old 03-24-2005, 08:25 AM   #2
serendipity
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It's pretty rich for only 5-12 psi. I would pull a little timing to get rid of the knock for now, and then lean it out in that area. You might find that you can bump the timing back up then.
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Old 03-24-2005, 08:41 AM   #3
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Looks to me like your timing is too high. take out 1/2 degree of timing from 60-80 load at 3750 rpms.
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Old 03-24-2005, 09:08 AM   #4
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Quote:
Originally Posted by serendipity
It's pretty rich for only 5-12 psi. I would pull a little timing to get rid of the knock for now, and then lean it out in that area. You might find that you can bump the timing back up then.
ditto on the rich. thats not too much ign adv.
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Old 03-24-2005, 09:33 AM   #5
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Thanks for the input. I'll knock out about .5 degree around the knock are and lean out the lower load sites.
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Old 03-24-2005, 10:58 AM   #6
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Are you sure it's too much timing? It looks like not enough timing. In my experience, the 7th column from the left is the amount of advance the ECU would be running if it were in control, and the 9th column from the left is the amount of advance you have programmed into your timing map. From 2 psi on up, you are running anywhere from 6 to 16 degrees LESS advance than the stock ECU would be happy with.

I would lean out the AFR a bit and try and get advance to be more in line with what the ECU likes. YMMV.
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Old 03-24-2005, 11:11 AM   #7
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Quote:
Originally Posted by Zola
Are you sure it's too much timing? It looks like not enough timing. In my experience, the 7th column from the left is the amount of advance the ECU would be running if it were in control, and the 9th column from the left is the amount of advance you have programmed into your timing map. From 2 psi on up, you are running anywhere from 6 to 16 degrees LESS advance than the stock ECU would be happy with.

I would lean out the AFR a bit and try and get advance to be more in line with what the ECU likes. YMMV.
absolutely. Increasing timing increases knock sensitivity whereas lowering timing simply has an adverse effect on EGTs.

The reason why the timing is lower than the factory ECU wants to run is because with Utec we are running considerably leaner than stock plus running higher boost levels and if we were to leave timing stock with as lean as we are, then we would be knocking all over the place.

factory ECU runs about 9.5:1 afr. Also he's on 91 octane which requires lower timing.
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Old 03-24-2005, 11:55 AM   #8
happasaiyan
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argh. if you look at that log, and then ALSO look at the maf that the stock ecu sees, you will see why the stock ecu wants to run so much more ign adv. given the accurate readings, your stock ecu would not be wanting to run those values.
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Old 03-24-2005, 12:14 PM   #9
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Quote:
Originally Posted by happasaiyan
argh. if you look at that log, and then ALSO look at the maf that the stock ecu sees, you will see why the stock ecu wants to run so much more ign adv. given the accurate readings, your stock ecu would not be wanting to run those values.

Lemme see if I grasp this right...given the fact that we've changed values from stock...IE: altering fuel, boost, and timing

The ECU is getting different readings than it would stock so that ignition timing is not really what the stock ECU would be giving?
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Old 03-24-2005, 12:21 PM   #10
happasaiyan
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yes.

given these 2 lines:
Code:
 3373  +2.3 3.5 101  20    00   +36.5   25.6 +24.0  +0.1 500.00 3.0  12.78 
 3663  +8.2 3.9 101  50    00   +24.2   38.5 +17.0  -0.1 500.00 3.5  10.86
on the last line, your turbo is really pushing 3.9v MAF into the engine, but its reporting 3.5. now, given that, the stock ecu wants to run about 24* adv around 3600 and 3.5. if you look at where the turbo is really pushing 3.5v MAF (the first line), youre running 24* of adv (utec). ign adv isnt THAT far off stock afterall.
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