After using my Nismo S-Tune exhaust for about a year, I had been saving up for an Injen CAI and a tune as my next mods. It's personal preference, but I didn't want to install the intake without a tune. From this forum, RT Tuning had high marks and decided to work with them on the tuning. The tuning software I used was Osiris Standard, since there's no local certified tuner on my island (Big Island).

I worked with Vince through emails and needed only one iteration to complete the tuning.

I don't have dyno runs/charts, however I was able to plot my AFR's from Vince's Version 1 eTune (base tune) vs. Version 2 tune.

Car: 2008 Nismo 350Z
Mods:Nismo S-Tune Exhaust, Injen CAI.
Stock Cats



I realize I suck at Excel.

Anyways, from my readings here in the forums, Vince will try to get the AFR's in the 12.6 - 12.8 range. Also it was mentioned AFR's over 13.5 showed signs of detonation. While I don't have log of a stock run, I can only imagine how lean I must have been running.

Performance wise, I do feel like the car has better pickup/torque in the lower RPM's and less resistance-feeling in the high RPM's.

While I'm still working with Vince on some minor things, I'd definitely recommend them for etuning, for anyone that's in a similar situation as me. They've been pretty patient and tolerant of my pestering.

I did have a chance to speak with Vince over the phone once and he really is an interesting person to talk to. I recall learning some interesting info on the tuning capabilities.

EDIT:
Below are the dyno results. The graph shows: Stock Tune, Version 1 Tune, and Version 3 Tune. Apparently I wasn't running lean, but rich with stock tune.

 

Sorry, can a mod please move my thread to the 350Z tuning area.

 

Wait so what were the final numbers?

 

I didn't do a dyno tune, so I don't have the before and after hp numbers.

 

Can you not use Virtual Dyno to get a dyno plot. I think VD supports UPREV.

 

I've never heard of that program before. I checked it out and it doesn't support 350Z's unfortunately.

 

http://www.bradbarnhill.com/projects/VirtualDyno/

I says on there that it does support UPREV datalogs. Give it a shot, what is mostly needs is TPS, RPM and Load to make the charts.
I adjusted the datalog that Haltech so it could be read with the VD when I was tuning in a country that does not have a AWD dyno available.

 

Bud,a Nismo catback and you are planning on buying a CAI...you are going through
all these calls/discussions on a tune.What are you expecting?
Hate to burst your bubble but these are everyday bolt ons that you may get another
10hp if you are lucky.

 

El Verdugo, I did check out the program (downloaded it and ran it). While is does support UpRev's logs, it doesn't have 350Z as a pre-set vehicle and I'm unable to set up a profile.

EDIT:
From my readings, it seems Virtual Dyno graphs can be somewhat accurate to what real dynos put out (under similar/constant conditions), however for my purposes, it's really not applicable and I'd rather not post deceiving information. Graph deleted.

 

True, as I mentioned it was personal preference. With the tune, I was expecting to run at a more appropriate AFR and achieve WOT throughout the RPM range, along with other items Vince adjusted. I wasn't expecting anything too significant. Bubble is not burst.

 

Neither of those dynos look like a DE powerband.

 

The program didn't have any profile for 350Z's, so I just chose one. All of the power curves were very similar, aside from the actual HP & TQ #'s.

 

I'm working on scheduling real dyno runs showing the actual changes in HP. I'll post the graphs up once I get them.

 

Damn dude, you must be a DE power band expert!

 

Added my dyno charts to my first post.
Overall, I'm glad the car was tuned to run healthier. Gained a couple HP. The dyno was done on a DynoJet 248. I was hoping for a higher HP number (I guess we all do), but at least I didn't lose power.

Was it worth it? If the tune enables my car to run at safer AFR, timing, etc. levels with the mods, then yes.