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Wow! I appreciate the great response. That is how we all learn.
Anyway, I followed the advice from Jimmy Blue pretty closely.

First of all, I had earlier cut down my retard, and adjusted it to...

Well, I think that I am ready to try to advance the timing? My PE AFR looks good. I shut my COT down. My LTFTs are a bit negative. I am not getting retard. I'd like to advance my timing.
Looks like...

Since we are talking about the wideband O2 and I want to go that way, what does Magic Chicken or some of you other folks recommend as a reasonable brand of O2 controller. A buddy says he has heard...

Thank you, gentlemen, for the excellent feedback.

As I understand it, if the enrichment rate is set at 1.0, there is no delay. That is fine and how my 03 was set from the factory.

I assume the...

I have thought about that myself. I can't think of any disadvantage to having two wideband O2s, one monitoring each side of the engine, except for the cost. With that said, I never saw much...

I heard that some of the professional tuners are setting the PE delay to zero. How do you do that through tuners? I didn't think that there was a delay. I would have thought that when the TPS and...

The front set of O2 sensors (before the cats) monitor the air to fuel ratio (AFR) of the engine during closed loop operation. The left front O2 monitors the left 4 cylinders, and the right monitors...

Thanks for the replies, fellas. I does help me understand tuning.

Screamin03,
I'll leave the IFR where they are for now. I don't want to get any closer to maxing out the injector's pulse width....

First of all, I want to thank the fellow HP Tuners who offered advice and encouragement in my attempt to tune my 03 Z06.

After installing my VaraRam cold air intake, my LTFT were in the +14 to18...

Thanks Jim;

You had a good suggestion, and it helped me. I followed your path, and confirmed it with a Forum search, and it works. I reset my fuel trims per your suggestion, and when I started the...

Sounds like the wideband sensor, like a LM-1, before the cats is the most accurate and the most consistent device. It convinces me to send my cable interface to HP Tuners and get the EIO.

Thanks...

After I raised the VE table 8%, and verified the I could read the LTFT and STFT on the scanner histogram, I disconnected the car battery for about 24 hours (since it was raining outside). I am not...

Thank You, Cbota and Blue Falcon;

I raised the VE table 8% and am evaluating the effect. I also figured out how to get the scanner histogram to work. I re-loaded the default PIDs and the histogram...

I have had this car, 03 Z06, and others on Dynojet rollers, and have often wondered how accurate the wideband AFR readings are since the probe goes up either pipe, after the cat. I have heard some...

Thank You, Cbota;

So I would have to increase the VE Table by multiplying through by 1.1, to lower the cell readings. As you suggested, we'll see if others agree that is the correct direction to...

Looks like some folks are reading about how I can't read the LTFT or STFT on the scanner histogram, but so far haven't been able to help me.

How about me doing this??? I can read the LTFT on the...

I got the 1.4 SW in late September and have done fine with editing to modify fan turn on, CAGS, and the rev limiter. I did the first dyno pull with my 2003 Z06 on October 16, and got a 348 RWHP...

I am just getting into the tuning after having HP Tuners about a month. I have edited to eliminate CAGS, lower fan speeds, and raise my rev limit.
I started to use the scan and have noticed that my...

I have a 2003 Z06. I believe both fans go on low speed when the stage 1 setting is reached; and then both go on high speed when the stage 2 setting is reached.
I believe the factory settings are...