t3rse
10-21-2009, 06:31 PM
I have been trying to tune my srt motor to no avail...I have SDS em3 which is an older standalone, but I had no issues getting the old 2.2 dialed in with it. Here's what I'm getting:
This is run1: http://hubcap.clemson.edu/~dberry/run1.bmp
and run2: http://hubcap.clemson.edu/~dberry/run2.bmp
I took off a charge pipe so boost is 0; it's a little rich across the board but that is fine for now...the problem is the spike...as you can see. The ONLY difference between these two runs is 10 points at 4750, which is at the beginning of the anomaly. In run 1, it spikes to 14.0...in run two it dips to 9.7...if I pull some amount of fuel in between, it spikes a little lean then goes rich, sort of like it does in run 1....lean, then real rich. It cleans back up before the next data entry point. The fuel values are really odd right now too. To get it anywhere near ok, it goes starting at 3750, 71-73-75-90-71-71-71, the 90 being the point at 4750...keep in mind the boost table is only adding fuel at 0.0 psi at the moment, and the SDS only has entry points at ever 250 rpm. So does anyone have a clue? I can feel the car break up where it dips rich, but if I pull fuel out, it goes to 15.0+, but the car feels smooth. Is there any way I am getting a consistent false lean at 4800?
I'm using an LC1 with an lma-3 for logging....I haven't turned down the sample rate for the LC1, but the gauge does average the samples and it shows less of a spike but a spike none the less....
This is run1: http://hubcap.clemson.edu/~dberry/run1.bmp
and run2: http://hubcap.clemson.edu/~dberry/run2.bmp
I took off a charge pipe so boost is 0; it's a little rich across the board but that is fine for now...the problem is the spike...as you can see. The ONLY difference between these two runs is 10 points at 4750, which is at the beginning of the anomaly. In run 1, it spikes to 14.0...in run two it dips to 9.7...if I pull some amount of fuel in between, it spikes a little lean then goes rich, sort of like it does in run 1....lean, then real rich. It cleans back up before the next data entry point. The fuel values are really odd right now too. To get it anywhere near ok, it goes starting at 3750, 71-73-75-90-71-71-71, the 90 being the point at 4750...keep in mind the boost table is only adding fuel at 0.0 psi at the moment, and the SDS only has entry points at ever 250 rpm. So does anyone have a clue? I can feel the car break up where it dips rich, but if I pull fuel out, it goes to 15.0+, but the car feels smooth. Is there any way I am getting a consistent false lean at 4800?
I'm using an LC1 with an lma-3 for logging....I haven't turned down the sample rate for the LC1, but the gauge does average the samples and it shows less of a spike but a spike none the less....