Any news on the retune ???

I received some interesting results. Will post up plots/vid tonight or tomorrow.

update?

Where is this new info ??

Update: 3/15/12

If you have been following this thread, last week Tony offered me a "more complete tune" by Church Automotive Testing (CAT) in Wilmington, on his dime. Having nothing to lose, I gladly accepted his offer and scheduled a dyno tuning session with Shawn Church for 12pm, Tuesday March 13th.

Tony was certain more power can be realized if both the timing and AFR was tuned as opposed to the tune by Seb@Specialty Z in which only the AFR was modifed.

I arrived at CAT at 12PM, however I was told Shawn has stepped out and would return shortly. At 12:15pm, another tuner said he'll go ahead and get my car strapped in and proceeded with the tuning session until completion at about 2:15pm. I would like to make it clear Shawn did not have any direct involvement in tuning my Z. However, Shawn did come over to the dynapack monitor several times and discussed the data log with the tuner.

Below are two photographs of the results. Green is the Specialty Z tuned map, and Red is the Church tuned map.

http://i1259.photobucket.com/albums/...rchdyno002.jpg

http://i1259.photobucket.com/albums/...churchdyno.jpg



Results:

Horsepower dyno plot was identical up until 5K RPM. Moderate gains (estimated 5-7 HP) were seen with a Peak HP gain of 6 HP.

Torque dyno plot showed gains by the Church tuned map at almost every place under the curve. A considerable amount of torque (estimated 8 lb-ft) was gained between 5K and 6K RPM.

I was pleasantly surprised with the gains from CAT. I decided to validate and confirm these gains on another dyno. Directly after the tuning session with CAT, I drove to Specialty Z and had my Z on their dyno shortly after 4PM. Gains shown on one dyno will reflect the same gains on another dyno.

Below is an image of the two maps on the Dynojet. Blue is the best pull for the Specialty Z tuned map, Red is the best pull for the Church tuned map.

http://i1259.photobucket.com/albums/...ifferences.jpg

Results:
Comparing the two tuned plots, both were strikingly similar. Peak HP and TRQ were identical. The two plots basically over laid one another. However, where are the torque gains between 5-6K RPM? Where are the HP gains after 5K RPM?


Questions/Comments welcomed.

Do you have the dyno run files for both sets?

Wow the two SZ do runs looks similar, but the only factor I can think of is that those 2 runs are a few weeks apart. Not sure how similar weather conditions were between the two days.
I would go by the Church dyno only because those runs were done back to back.

But I'm not one to get hung up on numbers; does the car feel any different driving? And man, these Z's seem to like their fuel.

Edit: just saw your further post below indicating that you tested both maps at SZ that afternoon. I'm stumped

Assuming that, going from one dyno to another should show the same results = absolutely blah false.

Your initial dyno is your best indicator. You cannot even compare that to your initial dynos from specialy z.

The thing you have to look at is, your base run, then your runs after the tune. Any variance there is your gain / loss. Trying to compare it to another dyno from another day, another dyno shop etc = useless.

So based on that, you did gain from the tune. Thats what matters.

You can go back to specialty z every day if you want and you'll see variances in the dyno's.

:iagree:

I would say that is definitely a measurable difference and free to boot! Dyno reads a bit high, but the results speak for themselves. The AFR's look much better as well.

For the pulls on the SZ dyno plots, we ran the Church tuned map then within an hour we ran the SZ tuned map. Same 2 maps, same day pulls just like the Church dyno plots. The delta gains still wouldn't be present?

ahh musta missed that part. there should have been a slight diff there if you indeed saw a diff from the dyno tuning

The SZ tuned map didn't include the cam adjustment, and as the last tune before it was applied (Church tune) did have it, then is that not why you didn't show those changes this time.

You can't adjust cam timing, only ignition timing.

Sorry, transposing them in my head, yes, i meant spark advance, point still remains ;)