EvilZ06,
here is my finding as to the PCM scans I analyzed with the Ease powertrain scanner.
For ease below I show the findings of the two test runs we did that were the same distances of the tests we did last week.

SVO 30 Injector tests

When we first did PCM scan testing, as you can see (top result report) the long term fuel trim was 21% too lean
WOT timing about 23 degrees.
Overall timing about 27 degrees.
4.2 mS injector pulse width,
non WOT, 16.2 mS WOT pulse width.
43 engine knocks, costing an average of over 4 degrees timing retard.

Due to the mods installed causing a hugh lean condition, engine knock, lower WOT timing and Ca crapgas, I knew this Z06 would respond best with the SVO 30 injectors and a MAF translator, rather then the general hype of "if it does not work, S-can it and go back to stock".

As I had mentioned in the past, going with the larger injectors gave a better outcome of not only tuning in the PCM via a MAFT, but also obtain better overall performance, rid surging, and reduce injector duty cycle.

You notice then in bottom test results how well the PCM and engine accepted the larger injectors and MAFT settings.
(NOTE: Weather was 85 degrees)

Overall timng went up to 32 degrees.
WOT timing gained 4 degrees which is also a gain for torque.
Injector plusewidth showed reduced duty cycle for both WOT and non WOT condition.
LTFT was reduced by 50% ( we can and will dial even more of that put and not effect inducing engine knock)
Knock - NONE, not even a .01, and that is with the crapgas and we allowed water and air temps to be higher then the "before" test

This once again showed that many of these high dollar mods can have an ill effect to overall performance but rather then just threw them in the junk can, by doing the proper PCM tuning and understanding the functions used bv the PCM.

As we began our first test run after installing the injectors and tuning the MAFT, I watched EvilZ06's face and he was caught off gaurd as pulling away from a stoplight, that now having good engine timing also woke up the torque and he hit the rev limiter far quicker then he could have before.


[QUOTE]Originally posted by EvilZ06
After talking to John I decided to upgrade from stock to the SVO 30# injectors. This meant that instead of setting the MAFT to 10% rich, we were able to go 10% lean.

Once the injectors were installed we performed an idle relearn (with AC on and off) and then took another test drive with the Ease powertrain scanner.

The results- absolutely ZERO KR at any speed or rpm and we also gained around 2 degrees of timing at WOT! The car feels very strong and pulls hard.

I will be dynoing the car on December 1st at the next bay area dyno day. It will be interesting to see if the SOTP holds up!

Hopefully John will provide a more detailed explanation, and possibly put up the scans.

Thanks! :cheers: [/QUOTE