[Official] "Do I need a tune with bolt-ons?" thread

[onefastz]

I know this has probably been asked before, but I've got the Stillen G3's and Stillen exhaust, so would a tune be beneficial? I've had these on the car for about 10k miles...and I'm just not too familiar with the whole tuning thing. Any suggestions on a certain tune if I should get one?

[spearfish25]

A tune can get you some more HP (~10) but it's not necessary. Uprev is strongly supported here.

[onzedge]

Originally Posted by spearfish25

A tune can get you some more HP (~10) but it's not necessary. Uprev is strongly supported here.

You should also reset your ECU after installation of these mods.

[6MT]

Originally Posted by onzedge

You should also reset your ECU after installation of these mods.

That's not necessary. An ECU reset isn't required after bolt-on intakes & exhausts are installed. Yes, a tune will give a better A/F ratio and give slightly better HP numbers (depending upon the maps used).

[christian370z]

I would recommend at least getting a dyno run performed where they monitor the A/F ratio to see what the car is running. Sometimes, G3 intakes lean the car out beyond the safe limit where I could tell you that it isn't a problem: my car was detonating slightly before my tune after installing the G3 intake even after resetting the ECU. However, conversely many run the G3 without a tune and have had no issues.

[ediazpr]

hi i have a 370z 40th anniversary with stillen headers, typhoon intake and cnt cat back. the uprev tune made a huge difference ,the car respond better you deffinetly see the difference in power. before the tune it gave around 276whp with the mods in a mustang dyno and after the tune a 296.4whp on 91oct and a 300whp on 104ct

[Dsphoto]

I installed an invidia cat back, berk test pipes and a stillen gen 2 cai.

Max:
Stock: 269 rwhp, 205 ftlb@5100 rpm
Pre uprev: 304 rwhp, 230 ftlb @ 5000rpm
Post Uprev tune: 337 rwhp, 254 ftlb @ 5000rpm

More important than the max numbers is area under the curve which increased substantially.

4000 rpm:
Stock: 150rwhp, 200 ftlb
Pre uprev: 170rwhp, 220 ftlb
Post uprev tune: 200rwhp, 242ftlb

3000 rpm:
Stock: 110 rwhp, 190 ftlb
Pre uprev: 112 rwhp, 210 ftlb
Post uprev tune: 145 rwhp, 239 ftlb

As most driving in in the lower rpm the tuning made a huge difference in daily driving. During max acceleration the tuning increased total power (area under the curve) dramatically resulting in a substantial increase in acceleration as well as smoothing out all the bumps in the power delivery curve. Huge difference.

Dialed afr to between 12.7 and 13.2, dialed in more advance. In NY we can get 93 octane gas.

[Sh0velMan]

Originally Posted by Dsphoto

I installed an invidia cat back, berk test pipes and a stillen gen 2 cai.

Max:
Stock: 269 rwhp, 205 ftlb@5100 rpm
Pre uprev: 304 rwhp, 230 ftlb @ 5000rpm
Post Uprev tune: 337 rwhp, 254 ftlb @ 5000rpm

...

Uhhhhh.... Yeah, I'm sorry, what kind of dyno? What correction factors? Sheet?

[Dsphoto]

Pre uprev:


I will scan the post tune dyno in a few minutes.

[Dsphoto]

Why are you sorry?



the numbers speak for themselves. Tuning made a huge difference.

[Sh0velMan]

Originally Posted by Dsphoto

Why are you sorry?

( Click to show/hide )

the numbers speak for themselves. Tuning made a huge difference.

No doubt...

I'm not trying to rain on your parade, but your pre-tune numbers and post tune don't add up at all. Something weird is going on with that "after" dyno, as I've never seen a mustang dyno report read that high on torque for any N/A 370Z.

Also, your mod list doesn't jive with the power you're seeing, if that dyno is correct. Would have been nice to see a before and after on the same dyno, as your pre-tune dynos seem to have torque numbers in the correct range, depending on the correction factor and all. You have to understand that so many factors can effect what the chart shows, particularly the dyno's weather station readouts and what CF settings are used at that particular shop. That's why dyno testing on the same dyno in the same weather conditions is so important.

Anyway, glad you are enjoying the car!

[Footloose301]

I'm running Stillen Gen3, HKS Hi Power TI exhaust, and GTM Resonated test pipes without issues so far..... :-/

I desperately want a tune but at $600... I wanted to wait for pulleys first.

[onefastz]

Yeah the only thing holding me back right now is the price of a tune. It sounds like it would be beneficial for what I have on the car, and would even be more worth it if it's "hurting" the car in any way without the tune.

[Onixt]

Stillen gen3 and art pipes do I need a tune up

[kenchan]

from the reading uprev seems like a good choice. plus no real hardware to get, just an OBD2 adapter to USB cable they supply in the purchase.

im more interested in getting rid of the throttle lag at the moment...