Tune needed?

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

ImportConvert

I presume that you did the HFC and the CB first, then the intakes? Any drivability issues with just the exhaust?

Which provided the biggest SOTP performance increase, or was I/E equal? I really don't think I would mess with intakes for less than 10whp. (me personally)

Nitex

Sorry for the slow reply, work got busy and i was forced to do something! Rude i know, its like they actually want to build this plane finally (787 dreamliner).

I cant comment first hand on SRM as i heel and toe, plus i purchased base-base so i wouldn't be tempted with SRM laziness. Also with my upgrade plans i would have wasted a lot of the sport package. I did do the HFC and CB first, then the CAI. There was no issues with that setup that i noticed. In fact after first installing the intakes and throwing the lean code i was tempted with going back to stock intakes. But after cutting my car up for them there was no turning back. Plus it adds some wow factor under the hood. SOTP feel seemed fairly similar between the 2 stage upgrade. But the real grin factor came from the sound. And HFC + CBE will get you there in that regards

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2013 Drivers ED GTI | Stage 2 Unitronic