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

[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?

[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...

[SPOHN]

If I were you I'd just hold out till you get some test pipes/ HFC's and then get a tune at the same time. Your probably more than safe now. Before my tune and all three of my breather mods I was lean but not dangerous lean. Are cars compensate pretty well.

[3zworld]

Hey all, I just wanted to find out if I will need to up rev/tune my Z after adding some bolt-ons. I have a Gen3 intake and FI TDX CBE is on the way, I just want to find out if I will need to do anything after/when I get these mods installed ?


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[Vichtz]

Ok so I just bought an 09 370z Saturday. Being the kind of guy I am, F.I. exhaust and stillen G3 intake are in the mail. I had an 06 mustang GT before this, which had a great community of tuners that sent reflash files for those of us too dumb to know where the dyno guys were at. Quick plug into the obd2 with the sctsf3 after any bolt on mods and you were set. however, I feel the Z is a much more luxurious vehicle and will receive special attention. I have never done a dyno tune before, So do I NEEd to get one? will I ruin anything with these 2 minor bolt-ons without a tune? I MIGHT put HFC's on later, but this is probably the extent of my engine modifications. I'm just new to this whole thing and am looking for advice. I live in college station TX, so if there is anyone around here yall know about that would be great information to have. Thanks for taking the time to read this and I appreciate any advice, I'm new to the Z world haha.

[Proshop01]

I have the F.I. exhaust and G3 intake, but never got it tuned afterwards. It has been at least 6 months and I haven't seen a need for a tune.

[gbrettin]

I have the F.I. Exaust w/o a tune and haven't had any issues. I've been driving this way for about 1.5 years.

[Pelican170]

You dont need to get it tuned as the ECU will correct itself with some time. Although a tune is recommended to get the A/F ratio perfect...

[bigdog1250]

You definitely don't NEED a tune. That being said, a tune will help get every bit of power out of your mods, just wait until you're done putting on bolt-ons to do it.

Congrats on your new Z, you're going to love it.

P.S. FI exhaust is the best! Good choice

[Huck]

G3's and just the CBE won't affect your A/F ratio too much to where you NEED a tune. I've got the G3's, and my non res'd FI LTH/CBE combo will be here in June. I'll be getting the Uprev after that since that freeflowing of a design is a little bit more dangerous...