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

gh0st3794 · 03-06-2010, 08:58 PM

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:

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.

gh0st3794 · 03-07-2010, 12:36 PM

Graph added.

import111 · 03-07-2010, 01:29 PM

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.

m4a1mustang · 03-07-2010, 01:31 PM

Quote:

Originally Posted by import111

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.

gh0st3794 · 03-09-2010, 11:17 AM

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?

theDreamer · 03-09-2010, 11:26 AM

Quote:

Originally Posted by gh0st3794

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.

modme · 03-09-2010, 12:14 PM

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

m4a1mustang · 03-09-2010, 12:18 PM

Quote:

Originally Posted by modme

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.

gh0st3794 · 03-09-2010, 12:56 PM

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

tbonesteak · 03-09-2010, 02:22 PM

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.

vipor · 03-09-2010, 02:48 PM

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....

gh0st3794 · 03-09-2010, 11:36 PM

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?

Red370 · 03-09-2010, 11:41 PM

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..

03-06-2010, 08:58 PM	#1 (permalink)
gh0st3794 Base Member Join Date: Jan 2010 Location: FL Posts: 121 Drives: 2012 NISMO 370Z Rep Power: 15	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: 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. __________________ -2012 Solid Red NISMO 370Z -2010 370Z 6MT sport pkg 301 whp 251.4 wtq (Dynojet) SOLD -K8 Suzuki GSX-R 600 Last edited by gh0st3794; 03-07-2010 at 05:28 PM.

03-07-2010, 12:36 PM	#2 (permalink)
gh0st3794 Base Member Join Date: Jan 2010 Location: FL Posts: 121 Drives: 2012 NISMO 370Z Rep Power: 15	Graph added. __________________ -2012 Solid Red NISMO 370Z -2010 370Z 6MT sport pkg 301 whp 251.4 wtq (Dynojet) SOLD -K8 Suzuki GSX-R 600 Last edited by gh0st3794; 03-07-2010 at 12:45 PM.

03-09-2010, 11:17 AM	#5 (permalink)
gh0st3794 Base Member Join Date: Jan 2010 Location: FL Posts: 121 Drives: 2012 NISMO 370Z Rep Power: 15	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? __________________ -2012 Solid Red NISMO 370Z -2010 370Z 6MT sport pkg 301 whp 251.4 wtq (Dynojet) SOLD -K8 Suzuki GSX-R 600

03-09-2010, 12:56 PM	#9 (permalink)
gh0st3794 Base Member Join Date: Jan 2010 Location: FL Posts: 121 Drives: 2012 NISMO 370Z Rep Power: 15	There's no separate map on the ECU for SRM with it's own fuel trim/timing though right? __________________ -2012 Solid Red NISMO 370Z -2010 370Z 6MT sport pkg 301 whp 251.4 wtq (Dynojet) SOLD -K8 Suzuki GSX-R 600

03-09-2010, 02:48 PM	#11 (permalink)
vipor A True Z Fanatic Join Date: Aug 2009 Location: Euless, TX [ DFW ] Age: 42 Posts: 13,531 Drives: Nismo 09-0183 QAB Rep Power: 49	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.... __________________ 2009 NISMO # 0193 \| QAB \| Albums! \| 05.04.10 (Dynojet) 291.94hp/248.28tq Oil Cooler (DIY) \| Custom Headlights \| GTSPEC Braces \| F.I. Long Tube Headers

03-07-2010, 01:29 PM	#3 (permalink)
import111 Track Member Join Date: Feb 2009 Location: Tucson, AZ. Posts: 622 Drives: 09 Nissan 370Z Rep Power: 191	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.

03-09-2010, 12:14 PM	#7 (permalink)
modme Enthusiast Member Join Date: Mar 2009 Location: NY Posts: 345 Drives: G37 Rep Power: 16	I believe you are wrong. The SRM is controlled by the ECU.

03-09-2010, 02:22 PM	#10 (permalink)
tbonesteak Track Member Join Date: Mar 2009 Location: Socal Posts: 914 Drives: MY09 MB 6MT Rep Power: 375	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.

03-09-2010, 11:36 PM	#12 (permalink)
gh0st3794 Base Member Join Date: Jan 2010 Location: FL Posts: 121 Drives: 2012 NISMO 370Z Rep Power: 15	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? __________________ -2012 Solid Red NISMO 370Z -2010 370Z 6MT sport pkg 301 whp 251.4 wtq (Dynojet) SOLD -K8 Suzuki GSX-R 600

03-09-2010, 11:41 PM	#13 (permalink)
Red370 A True Z Fanatic Join Date: Jul 2009 Location: Kaiserslautern, Germany Posts: 4,391 Drives: your mom to church Rep Power: 296	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.. __________________ 2011 Mustang 5.0 \| 3.55's \| Lethal Performance off road H-Pipe \| Magnaflow Muffler Delete \| JLT CAI/Bama tuned 417whp/ 404 ft/lbs Last edited by Red370; 03-09-2010 at 11:43 PM.

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