NISMO Uprev tune no gain?
 

Hi all,

I bought a used stock 14 pearl white NISMO with 11k miles a couple of weeks ago.

One of the first things I did was get an Uprev tune done on it as I thought it would make the throttle feel livelier at lower rpms and increase the WHP a bit (10-15 whp throughout the powerband).

To my disappointment, the whp mainly increased above 7500 rpm because the redline was raised to 8k rpm. There is no increase in power at all until about 5000rpm and above from there is maybe 3 to 4 whp increase. Max torque is about 2 ftlb higher, but it says the average is still the same as before 200ftlb.

On another note, I was wondering if the stock dyno numbers 272/206 were even a bit lower than some stock non-NISMO 370z's here on the forum. I have seen about 270 to 280 whp from different members here and NISMO is supposed to have maybe some 15 whp more than regular z.

After tune I have 282/208, probably more like 276/208 because I'm not sure if I want to venture above 7500rpm.

I attached the dyno sheet, tune performed on Mustang dyno.

Am I rightly disappointed or is this normal? Maybe you guys can let me know your thoughts! I would really appreciate it.

By the way, I love the car, just feel like I threw away money for this tune.

I would think you need to add breather mods prior to a tune to see any substantial gains.

NISMO Uprev tune no gain?
 

Mustangs read lower than dynojets. Raising the redline is a bad idea. Also, Nismos have 18 more horsepower at the crank, not 15 more whp. Have your tuner use the throttle map here in the tuning section. Most tuners ignore the throttle tables.

Is it tuned on a stock motor? Typically members have cai,hfc,cbe then tune.

It is completely stock motor. I was in the area in South Florida for only a couple of days and there is a tuner there who is recommended by a few guys here so I just went with the hot headed excited tune on the stock motor after owning the car for 3 days.

If I added an intake like Stillen gen 3, would I need a retune? The tuner said that the Nismos have pretty high flow exhaust, he recommended only test pipes and intakes. I won't get test pipes cause they are a bit too loud.

Plus I just looked around, people have 250 ftlb and I only have 208. Isn't that a big difference on torque even if they used dynojet(higher numbers) and mine was on Mustang(a bit lower numbers)?

Modest gains at best from a tune alone (i.e., with no mods) is typical.

The only numbers that are easily comparable are dynojet to dynojet numbers -- Mustang dyno #'s cannot be easily compared to each other from shop to shop let alone from one to another dynamometer entirely, but those #'s are probably spot on for a stock Nismo and your gains are solid for tune alone.

Yes, if you add breather or exhaust mods, you will benefit from and/or need a new tune.

I have a 14 Nismo. I added an HKS Hi-power exhaust for a notable improvement above 3k all the way up, drove it for several months then added a Nismo R-Tune long tube intake with notable improvement above 5k. I think you jumped the gun on the tune. Until the engine can breathe more freely it will be difficult to make any significant improvements.

If you added nothing by way of aftermarket parts, I am surprised that you gained anything at all. You need something like a CAT-Back, Intake, drop-ins/hard pipes, or some combination of those to get gains from the tune. The throttle map can be tweaked and you can add features like VDC off from the start or map switching to add Valet or Security Mode(s). If I were you, I would contact UPREV and see if they have something that you are interested in before you go back to your local tuner.

Op who did tune your Nismo here is South FL?

Just an FYI we did the first 2015 and to our surprise it needed almost nothing! The car had FI LTH, CBE, gen 3, ported lower, upper and TB's and it barley needed tweeked. The newer the car it seems the less a tuner is needed. The adaptability of nissans Ecu is just amazing with the OEM widebands. We turned off the secondary O2 CELs, richened it up a little from 2-4k and that was it. The car was trying for full timing and running right where my tuner likes the ARF.

Before the tune AND ported parts the car made the same power in 5th gear. Only 4th gear showed the gains. The 15's also have more advanced TB's. Everything nissan does is just amazing OEM with the motor stuff. I would like to see 14 TB's though.

Old

http://i39.photobucket.com/albums/e1...psfxngk0ws.jpg


New

http://i39.photobucket.com/albums/e1...psxe8yrodp.jpg

^^^ That's an interesting design change -- but is it "better" or just "different"?

What about the new design seems improved over the old? Could just be that they're sourcing the components from somewhere else.

Actually, on that note, does this mean you can't mix and match TB's from 2015 to earlier MY's?

Scott, please explain what we are looking at. I assume TB is throttle body but that's obviously not a throttle body...

No Dyno graph eithe,Scott@Synergyr? Come on man :)

BTW you gained 10 WHP and 10 WHTRQ, sound right to me for just a tune and nothing else.

"the redline was raised to 8k rpm."
Please don't raise your redline unless you have replaced your oil pump with the nismo one (doesn't come stock on nismo Zs)
Most cars these days won't get any improvement in anything from the factory. Manufacturers have gotten much better over the years in getting as much power and fuel efficiency as possible.