1st tune check it out

[sprayed1998]

I have been tuning my Z06 for a couple months now using this forum as my main tool. I already had a decent base but have made a bunch of changes and finally have it where I want. It is a 402ci 02 Z06, set up is in my sig. The STFT's are all within +,- 4% and the MAF is damn near all within +/- 1% using EC Tune's method. The a/f is exactly what I command @ WOT and it does not knock ever. Please let me know if anything sticks out to you or any suggestions, the car drives like a dream (daily driven 70 miles a day) it averages 15mpg city and close to 20 on the freeway, which is good IMO for 3.90 gears in a MN12. One thing I was pondering was adding some timing in my cruising cells to see if I could improve my fuel economy.

[WS6FirebirdTA00]

Post a log if you can.

Timing table looks like it may be able to use a little more in the cruising areas. It may also help the response of the motor. Your idle airflow looks a bit low, did you drill the TB by chance?

I would set the fan temps higher, I doubt the motor is running any cooler than 180ºF in the winter time (I could be wrong). I would set them so they are on longer and at some higher temps. Just my opinion though.

[sprayed1998]

The car runs @ 176-178F 99% of the time. Only time it actually goes above is sitting still in summer temps. The idle airflow confuses me as well but it just do what it says with the RussK config. It idles and drives as smooth as a stock car. Intake set-up is ported 90mm FAST, MTI Z07 90mm TB, LS3 MAF and huge open filter. I am willing to bet if I were to set my scalar to .180-.190 like some with 90mm TB do it would want more air at idle, but why change it if it runs well? Ive never understood how some people run .0190 and some go .0320. The guy who tuned my car before had it set there and it seemed to like it so I left it. TB is not drilled BTW.

[WS6FirebirdTA00]

OK, the larger TB would change it as well.

[smithers]

I am willing to bet if I were to set my scalar to .180-.190 like some with 90mm TB do it would want more air at idle, but why change it if it runs well? .

other calculations rely on scalar configuration. Scalar tells the ECM the physical size of the throttle, so the ECM can determine what % throttle, would calculate to what amount of open based on the mm2 given, through the Scalar.
Sure, you can tell the computer .0320 (a 68mm throttle) and force it to idle correct but every throttle step towards WOT is incorrect and adjustments are being made elsewhere to compensate (or tune). as the ECM thinks it needs to open the throttle 2 steps per say (or a certain angle) because it thinks its a 68mm vs it should only move 1 step because its a 90mm to flow the same amount of air required in reality. -i know, bad at explaining things.

If you change the scalar to the correct value, and it idles awful, means the tune needs correction.
If it was done correctly from the get go, the ETC should have been changed and then tuned.

ETC SCALAR is a physical SIZE of the throttle based on mm squared area to determine percent throttle.
If you read what HPT says it stated:
This value is used to convert from desired Effective Area (mm2) to desired ETC percent.
Some go 0.320 with a 90mm ETC throttle, because they dont read.
I prefer optimization rather than assuming, because it idles fine doesn't mean its not affecting some table or calculation somewhere else.

I have an archaic worksheet, and redhardsupra has a better one floating around...look at the Symptoms and Causes sticky.