Got a baseline dyno done on my stock 370z 6MT
 

The runs were conducted on a dynojet. Will post charts as soon as I upload them.

SAE corrected numbers were:

run 1(5th gear): 270.15 whp, 232.03 wtq
run 2(4th gear): 280.91 whp, 235.21 wtq
run 3(5th gear): 286.54 whp, 243.08 wtq

It was about 70 degrees in the dyno bay. When the dyno operator put the clutch in at the end of the first run, as the car was winding down, synchrorev attempted to rev match the rpms. Needless to say, this kind of scared me and the operator heh. The second and third runs were both done with synchrorev turned off. The car seemed to make more power with each run. Any reason for that? Runs 1 and 3 were both conducted in 5th gear, but they seem to have a bit of a variance power wise. The only difference was that synchrorev was turned off for run 3. Would synchrorev affect power delivery at all?

Also the ABS and skid light turned on while on the dyno, but turned off as soon as I pulled the car off. I'm assuming this is normal due to the wheel speed sensors seeing that the front wheels weren't moving?

Graph:

http://imgur.com/8NH0E.jpg
The distorted A/F at the end of run 1 happened when the operator put the clutch in at the end of fifth gear. He said the syncrorev tried to rev match, and just kept revving in neutral.

Just for reference, I looked at a couple of past runs from some other cars that they had saved. A stock 350z put down about 235whp, and an I/E/Tune 350z put down about 253 whp, albeit not on the same day as my runs.

Graph added.

SRM shouldn't have any effect on power. Looks like power goes up consistently every run. I would guess oil temp warming up thinning the oil and the engine not having to work as hard.

Not power... he was talking about the A/F reaction to SRM kicking up the revs anticipating a downshift at the end of the run.

Is SRM handled by the ECU, or is there a separate TCU that controls it. Also, switching SRM on or off doesn't switch to different fuel/timing maps correct?

I believe SRM is outside the ECU on the transmission, so turning it on/off should make zero changes.

I believe you are wrong. The SRM is controlled by the ECU.

Yeah, I think you're right. All of the SRM sensors are obviously on the transmission, but the ECU is controlling... which is why you can't add SRM to a base model car.

There's no separate map on the ECU for SRM with it's own fuel trim/timing though right?

maybe you should give it another go. 16 hp difference from run 1 and 3 is a big difference. I wouldn't know what to take from that honestly.

It could have been the car just adjusting to the power demands. "Oh you want to go fast, okay, one sec." Like when they talk about resetting the ECU when you get major mods or w/e. Iono....

It's not the first time I've seen it on the boards. A couple of dyno threads showed similar results. They would dyno low for the first 1 or 2 runs, then all of a sudden dyno 10+ hp higher on the following runs. It's a weird occurrence, but it seems to be happening to others. Anyone know why?

Yeah I posted my dyno charts a while back, car seemed to make more power the hotter it got, shocked the hell outta me really... and it was 100+ degrees out that day..

http://i250.photobucket.com/albums/g...6/DSCN0216.jpg