Tune needed?

ImportConvert

Do you need a tune for HFC's and a Cat-back? How "adaptive" are these cars? I know the factory tune is conservative (as are all factory tunes), but does HFC+Catback throw the tune off, or do people get tunes just to raise the rev-limiter and get a few extra horsepower by being a tad less conservative than OEM?

Any A/F included dyno's of a car with HFC/Catback and no tune?

6MT

There are 4 factory ECU "tunes" for the 2009 (not sure about the 2010's). Some say that with these "bolt-ons", that you need to fiddle with the A/F ratio. I never did and I don't have any issues (never had after 10K kms). My dyno showed improvement over the base-line (factory) numbers.

IMHO no, you don't need a tune. But some will say that it would help. I have never seen the need for one.

(please keep the flaming low.... I know this is a hot-button issue with some.)

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Andrew

2009 370Z Sport/Touring 6MT sold
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Nitex

A tune will likely net you a few more HP/tq, as well as get your AF ratios to a desired level. Slight performance increase with a possible increase or decrease in MPG depending on were your AF lands. Our ECU is fairly adaptive, as my car has a safe AF ratio and made some good power from the bolt on mods and im still on stock tune.

If you are not messing with the intake you absolutely do not need a tune. In fact i would not waste your money unless you do.

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2013 Drivers ED GTI | Stage 2 Unitronic

ImportConvert

So basically, a tune on a stock car is worth the same % gain as a tune on a modded car, as the ECU is adaptive enough that you get the same % power from your mods either way, pretty much?

PS. You layed down 299 whp on a MUSTANG dyno SAE corrected? Is that what I am seeing? Mods at the time?

PSS. After looking at your dyno graph and A/F, it looks like avg. hp/tq could SLIGHTLY benefit from a tune, but not a whole ton. Mainly the car might feel a bit "smoother", but it doesn't drop off bad at all when your A/F dips. Nice!

Is "Syncrorev" still "accurate"? Or is it jerky now?

Nitex

^^ i don't doubt that its close, however as edited in my first post, i wouldn't worry about it till you mess with the intake

Yes 299 on a mustang dyno with Gen 3 intakes, Berk HFC and Stillen CBE w/stock tune.

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2013 Drivers ED GTI | Stage 2 Unitronic

ImportConvert

Why? Is this because smoothing out intake flow will raise the A/F and possibly create a lean condition while un-corking the exhaust will create a rich ("safe") condition? Or is it that the ECU doesn't respond well without a tune to mods on the front half?

I honestly don't think a tune would be worth much (5whp?) if all was being done was correcting your A/F here.

Does the car surge or feel less smooth than before the mods?

Nitex

Lean condition is a possible worry. I threw a lean code shortly after installing my intakes. Thats why i opted for a dyno pull to see if things were checking out. I would say 5hp is a good guess on gains from a tune with bolt on's. It has been to long for me to comment on smoothness of power delivery pre and post mods.

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2013 Drivers ED GTI | Stage 2 Unitronic

theDreamer

The best thing to do is find a shop with a good accurate dyno, get a AF reading and see how things are.

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fullmonty

You won't need a tune for a CB and HFC. If you get one you may get some more power out of it all, but you won't need to get one

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Loges

I have K&N drop ins and Z1 MAF tubes installed now with the intentions of getting Motordyne ART pipes and Fast Intentions CBE (not sure yet on 12" vs 18" resonators but def one of the two, NOT going non-resonated).

Will this require a tune? I know obviously it would help but I'm concerned on whether or not I will run the risk of running too lean and possibly damaging the engine. Once my warranty is up though I'm all for a tune

Tipin4moe

Have you had any engine issues with your mods and not running the tune? I have so far ? Or did you end up tuning your Z?

SouthArk370Z

The rule-of-thumb is that you only need a tune if you make both intake and exhaust mods. The ECM will usually compensate enough to protect the engine if only one side is changed. However, many people think a tune is well worth the time/expense - even with no mods - due to better throttle feel, better shifting, more power, etc.

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K1ngCee

Agreeing with that bro up there ^ i recently got my exhaust installed and honestly didn't even think of getting a tune just for that. I know an aftermarket exhaust is more than just for noise, but I dont feel the need to spend on a tune without completing the bolt-ons I/H/E first. after i get some Stillen air intakes, then for i would probably start looking into a tune for sure (I don't plan on changing out the cat's, just yet).

ShuuraRG

A tune seems almost necessary for Nismo's after upgrading both exhaust and intakes. After I installed my exhaust, last month, all was fine. However, a few weeks later I installed my Stillen Gen 3 intakes and the car started going limp mode after every WOT. Turns out that the Nismo's are tuned pretty lean from the factory with OEM parts. Without a tune to compensate for the parts, I was relegated to eco-driving. Now that I've begun tuning with Seb, all is well and so much fun!

Rusty

Mine was rich before tuning.

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