Nissan 370Z Forum - Nismo Uprev Tuned by SpecialtyZ

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- - Nismo Uprev Tuned by SpecialtyZ (http://www.the370z.com/nismo-370z/48916-nismo-uprev-tuned-specialtyz.html)

Great numbers. I just got my Stillen Gen3 intake installed and will be installing a full exhaust system in the next couple of weeks. I will be tuning with UPRev at the same time. Do you know the parameter values that SpeacialtyZ set?

Funny thing my baseline Dino showed Rich A/F ratio....

Quote:

Originally Posted by QVu (Post 1520199)

Overall drivability is noticeably MUCH better/smoother. It's much more responsive than before. There was an increase in power throughout the RPMs. The car just seems "healthier" than it was before the tune with the bolt-ons on. According to Sebs, the Nismos run leaner to begin with, and with the bolt-ons you can see in the baseline run that the car was runnin way toooo lean. I went in to the shop originally to get the car checked out because the car seems to labor more than usual driving in 5th and 6th after installing those parts.

I would definitely get the tune done if you have made those basic breather mods, or just have the ratios checked to be safe.

Thats odd, cause my tuner said my car was running to rich with all my bolt ons prior to up rev. Ecu slightly recognizes the cars change and burns rich to be safe. Dialed in leaner and my car rips now.
Your torque curve looks healthier then mine was. Im sure you feel the pull threw the gears. Props to SpecialtyZ

Quote:

Originally Posted by antfd3s (Post 1559584)

Mine was also running very rich with the bolt-ons. The tune cured that (and more).

People told me the power line and the torque line should be always across at 5000(rpm) on the dyno sheet. Is it true? And why?

Quote:

Originally Posted by forza370z (Post 1560275)

People told me the power line and the torque line should be always across at 5000(rpm) on the dyno sheet. Is it true? And why?

Physics.

Horspower is essentially torque X RPM. 5252 is the crossover point.

I did some ECU logging the other day of my car, and yeah it's running lean big time as well. It gets progressively richer past 4K RPM hitting mid-13s or so. But below that I'm in the high 14s most of the time. :|

The problem with our ECUs, and this pisses me off a lot, is that they progressively adapt weeks after you've done the mods, leaning out the mixture with time. So for the first few days after an install, there's tons of power to be felt (which is why dynos also show bigger area under curve gains when installs are dynoed same day). Then as time goes on, the ECU makes some adjustments and power is lost. Same story with my 350Z, power felt great for about a week, maybe two, and then it desperately needed a tune as top-gear passing became a struggle - low-end power was diminished. 370Z is experiencing the same right now.

I'm gonna be making some adjustments to the base map and verify it. Right now it's a little annoying trying to get some decent 0-80 pulls on dead streets since cold weather is creating too much wheel-hop - but at least I know what AFR ranges I'm working with.

Pretty much the exact gains I got, congrats. The tune really makes a difference. Much peppier!