I will do some dyno testing as well, thanks for posting your results.
After reading this thread I was curious so I decided to increase the values as described here. Increasing the injector timing by 20% caused the entire tune (idle, part throttle, and WOT) to go way lean. So then I decreased the injector timing values for a net increase of 5% over stock values and the tune was still lean though not as bad as before. Oddly enough the injector duty cycle went up across the board with the increased timing values. In each case I adjusted both the VE and MAF values help compensate but in the end I went back to my existing tune.
Is your cam and heads stock?
230" Dragster - 2000 LS1, 02020003 Speed Density, PRC 2.5 Heads,
MS3 Cam 237/242 .603/.609, Vic Jr. intake, Holley 1000CFM TB,
PowerGlide, 5000 stall converter. 8.70@154 MPH
My Projects Homepage: http://www.horsepowerracing.com
DrkPhx, do you have the logs? this is seriously interesting what you've observed.
I'm far from stock. It's an auto car with a large stall and a highly modified, high compression 402 with a fairly large cam. I run 42-lb Delphi injectors with the fuel pressure set at 61 psi (at the rail measured with a mechanical test gauge). I confirmed the lean condition with both the LTFT's and a LM-1 WB which is used for all logs.Is your cam and heads stock?
I'm still looking for the logs (one was quite long) but I use the BBL function and never renamed the logs when I uploaded them to my laptop. I can't search by date either because the time and date isn't real time when using the BBL.. I will keep searching and post it up when I find it.DrkPhx, do you have the logs? this is seriously interesting what you've observed
I found one of the logs. It's not as big as I thought, but there's enough data there to see what happened. As you can see in the log, the car seemed to get progessively leaner towards the end of the log.
School me, I must be looking at your log incorrectly, I dont see the "way lean" condition. If I take your entire log over 190 degree, I show the average stft to be .06 and .08
Lee
230" Dragster - 2000 LS1, 02020003 Speed Density, PRC 2.5 Heads,
MS3 Cam 237/242 .603/.609, Vic Jr. intake, Holley 1000CFM TB,
PowerGlide, 5000 stall converter. 8.70@154 MPH
My Projects Homepage: http://www.horsepowerracing.com