All:

Just a few days go I received my car back with:
* Fabspeed sport exhaust system v3 (cats, mufflers)
* Fabspeed tips (black chrome)
* Fabspeed headers
* GIAC tune (93 octane)

I still only have 800 miles on the car, and so I'm still breaking it in (my way, which is to keep under 4K RPM, but have bursts of speed to redline @ WOT, then run down through the gears). So it's a mixture of by the book and drive it like you stole it.

As for the sound with my mods--love it. Very deep note on idle, and cruising RPMs, with a wail of a sound under WOT. Semi-annoying drone at 2.5K RPM, but I can live with it.

From 0 to 60, I notice what appears to be a significant increase in power and TQ. My max boost PSI goes to 17 now with the tune. However, my TT seems more mild from a 4K RPM to redline in any gear 3 and above. It's a linear powerband in that range, and certainly fast. However, I feel as if it felt faster in that range prior to the mod. Perhaps this is just due to the software smoothing out the power, not sure.

Anyone else experience this?

Oh, and I got the rear center console, instrument cluster surround, and cupholder trip pieces painted in Guards Red to match the exterior -- looks sick! I shall post pics soon.

Cheers

 

Congrats on the new tune!! I had an EVOM tune with Cargraphic Super Sound export exhuast (580 hp) and no way was it slower above 4k rpm especially in gears 3 and 4...Thats where I noticed the most dramatic difference, thats when the turbos are spooled up and u really should notice a dramatic difference....I know I did in my previous 997TT coupe

Lou

 

That's a bit of the irony for me. Certainly in gears 3 and 4, from 4K RPM to redline, the turbos spool quickly and to 17 PSI (per the bar graph on my instrument display). I'm looking at my digital speedometer reading a steady 80, hit the throttle, and I'm at 100+ in a blink of an eye. The car just does not "feel" as fast, though the instruments say otherwise. Maybe I'm just expecting more fanfare in that range.

The 0 - 60...80...is certainly incredible. Tires chirping, engine wailing...very nice.

Off topic, I must say, I truly miss the sound of my 997 C2S. The deep growl of the TT and the whine of the turbos is captivating, but there's something about that naturally aspirated engine at high revs that just closes the deal. Since it was a cab, and still only had 3K miles on her, I should have kept it along with getting the TT. Oh well.

But back on topic...still interested in hearing further comments on their mods & the effect between 4K and redline in gears 3+.

 

Thanks for sharing the interesting report. That is certainly not good if your car feels slower after the GIAC tune. Do you have the flashloader so you could go back and forth between tuned and stock-like mode to compare and confirm your finding?

 

all I know is my Evomsit flash makes quick work of anything in its path, 4th gear just feels violent, Ive never been in a car that pulls so hard at that kind of speed...I find myself giggling when the loud pedal hits the floor.

I have a hard time believing the GIAC tune would not generate a similar response, both companies are solid with proven gains 90% of us would not be able to tell the difference between at this level of the game. Who did the flash?

 

Im telling you, when I moded my car even just at 580hp it was scary fast and felt a huge difference and i mean huge in 3rd and 4th gears especially over 4000 RPM....Maybe the tuning is off?

And to ur OT, couldnt agree more...Although Im comparing to 996TT with Cargraphic exhuast sounded mean/loud/awesome....The VTG turbos mute any exhuast on these cars a ton...The only thing loud is straight pipes or muffler delete, but thats so loud and doesnt sound good to me...

Lou

 

I agree, I had the EVOMS EVT2 with Cargraphic exhuast it was violent and crazy fast just as you describe

Lou

 

I noticed a big difference going from a giac flash to the RUF ecu, tons of TQ and power that screams to redline in a very linear fashion. So much so that I have to be careful with the throttle modulation now. Not that the giac was bad, but just very different application of the TQ/HP.

 

[QUOTE
Off topic, I must say, I truly miss the sound of my 997 C2S. The deep growl of the TT and the whine of the turbos is captivating, but there's something about that naturally aspirated engine at high revs that just closes the deal. Since it was a cab, and still only had 3K miles on her, I should have kept it along with getting the TT. Oh well.
][/QUOTE]

I wish I kept my 997s too . Not so much because of the sound because the Tubi Race Exhaust blows away the exhaust note of the NA car plus the Turbo rips it in every way.
I miss it because once I spent so much to mod the 997tt that I want to preserve it. If I kept my NA car it would have been a great daily driving Porsche.

 

"tires chirping " are you guys chirping tires in 6 speeds ,i've tried but can't seem to get .

 

OT: Doug please check PM. Thanks.

 

Yes, chirp in 1st and 2nd, but with perfect launches & w/ my mods. Stock = no chirp.

 

OK, as an update, this morning I spoke with Champion Motorsport (where my ECU was flashed with the GIAC software). They confirmed for me that the tune provides gobs of HP and TQ in gears 1-3, but then becomes more linear in higher gears. I'm told it has to do with the A/F ratio and having them err on the side of caution w.r.t to not running to lean, and not changing the redline.

I think what I'm experiencing is trying to compare my experience with gears 1-3 with 3-6. I think when I ran stock, I "felt" more power in gears 3-6 from >4K RMPs because of some slight turbo lag. Now with the tune, the turbos are spooling faster and so the power feels smoother.

And the Fabspeed sport exhaust version 3 is still bellowing its naughty tune. I've read these systems may take some time to dial in, but I'm loving it just the way it is.

Can't say enough about how well this tune turned out for me. I'll be meeting someone next weekend with the Tubi system and an EVOMS ECU tune. I'll report back on the non-technical comparison.

Plus...still need to upload the pics of the painted pieces.

 

Very nice. Keep us posted as she breaks in.

 

Your comparison of GIAC to EVOMSit would be very interesting to people still sitting on the sideline. I assume both cars are at similar "stage" of ECU mod?

Does what you feel similar to the description below, from a poster comparing APR to GIAC?
>>>>>>>>>>>>>>>>>
https://www.6speedonline.com/forums/...-system-2.html
hi andrew this is khoi from canada it has been a while since our last talk i didn't had a chance to give you some feed back on my back to back experience between your performance 93 oct flash and my previous apr 93 oct program on my otherwise stock 997tt so here it goes if that can help anyone:
1) yours seems to make more hp especially after 5000rpm but it the same smooth curve as stock this is especially good on track where smooth and high rpm is the norm
2)yours max boost is 1.2 bar in sport mode
3)no error or malfunctionning or cel even on track
4)APR program feels more powerful though ie more torque (kick in th ***) in the street zone which is from 3500 to 5000 rpm and really change the overall character of th power delivery so more difficult to modulate on track but more fun on the streets and in higher gears
5)APR max boost is 1.0 bar but gets there quicker even if i'm not quickly depressing the gas pedal whereas giac is like stock you have to mash the throttle to put it in overboost
6)APR eliminates the overboost button/function they told me their program doesn't need overboost which can be actually easier that way
7)APR program made my electric driver seat stop functionning after a week the problem was solved after a factory reflash on the seat though
all in all in a nutshell from my personal point of view:
APR better kick in the pants more torque less fiddling with the sport button(i hate having to push the sport button every time AND the suspension button back on normal pasm for street driving to put it my way) less stable program???(ie computer in seat, pasm?)
GIAC smoother, more hp higher in the engine range, very stable , more max boost
there hpoe it helps everyone