For comparison sake here is my car's dyno with the original K24s with exhaust, wastegates and GIAC Flash. This was a dynojet at an independent third party facility and having gone through rounds of mods after this I am CONVINCED that 500 HP on this dyno was nothing close to 500 HP on a Mustang Dyno as you will see below. The car is SO much more powerful now. I don't know how much power it really had at the time... maybe 450 REAL wheel HP (550 crank)?



As some of you know, I upgraded my K24s at my favorite shop Speed Gallery in Studio City this year with the following mods:
The latest Tial 2860rs (ball bearing, watercooled)
EVO Diverters
60 lb injectors
Hitachi MAF
AAsco LWFW - Got rid of this and went back to stock flywheel
New Sachs Clutch

GIAC was gracious enough to allow me to upgrade my K24 file which i had purchased over 3 years earlier for a nominal cost.

The car was very fast and spool improved tremendously. But I felt like the car wasn't running very well at full throttle. After contacting GIAC, I took the car down there where Garrett and company quickly realized that the file I had was too aggressive (it was an intercooler file). They dyno tuned the car and gave me custom file which while significantly less aggressive in timing and boost, allowed the car to run better and stay off the knock sensor. I picked up about 75 HP and 75 ft lb of torque that day and the car was utterly transformed.

Here are the before after graphs:


In looking at the intake air temperatures GIAC was adamant that the car would run better (as is evidenced by teh "stairstep" HP curve above) with some intercoolers and offered to review the tuning as well address some minor small throttle driveability issues once I installed the upgrades.

I chose to go with EVO Clubsport ICs and Speedtech Hoses and Y-pipe. The EVO intercooler design allows you to remove the restrictive factory style connectors and combined with the Speedtech Y-pipe really cleans up the airflow path of the compressed air all the way to the throttle body. Once all that was installed I again dropped off the car to GIAC for fine tuning.

I have had extensive private conversations with several 6 speed members running non factory MAF setups from several different vendors and the general consensus has been that you have to give up some driveability when you ditch the factory MAF, this is especially true when going with a LWFW. I am very nit-picky and particular when it comes to the small details and really expect stock like driveability. I am very happy with the results. The newest file GIAC installed is truly BUTTER smooth and stock like just as Garrett had promised.

Now on to the good stuff! Keep in mind that this is a TRUE 91 octane file, running real 91 octane at 18 PSI ~ 1.22 BAR with NO CORRECTION FACTOR.



GIAC's dyno registers a stock TT at about 330 WHP like one would expect. I am very happy knowing that my car is making abot 200 WHP more than a stock 996TT on California 91 Craptane gas and 70 more WHP than a stock 997 GT2 on the same dyno. I can't wait to try some 104 and use my GIAC handheld switcher to see how that feels!

I figure the car now has an honest 650HP on 91 octane and 700? HP on race gas. It's done. Put a fork in it!

Special thanks to the following vendors and members

The crew at GIAC for putting up with me and going out of their way to make sure the car runs like I wanted it to
Dan @ The Speed Gallery
John @ Speedtech
SamboTT
Markski @ 911Tuning (I would definitely consider his ICs but i had already bought mine)
Tony @ EPL
Kato
Paneraiwatches
Sharky @ SharkWerks
Dan @ Vivid racing

 

Nice job, Ari! I bet your car runs beautifully now.

 

good deal glad you are enjoying it

 

Thanks guys. It's been a fun adventure. I'm ready to start enjoying waxing and driving her.

 

Thanks Ari! I think I will be following in your footsteps very soon!

 

Good work Ari... glad it is finally coming together..
mark

 

Thanks for the shout out!

 

Happy for you, enjoy it safely!!!

 

Sorry for the question, but comparing the 2 graphs from GIAC, it looks like you lost some torque at low rpm's. It's difficult to compare cause the scaling is different but I have this impression.
Do you feel it while driving? Does it depend on the bigger IC's size and volume? Or it's coming from the SW setup?
Thank and regards

 

I'm going to vote software. The volume of an IC, unless you go from tiny to heyuge, isn't going to make much of a difference either in spool or in torque. the massive amount of air being flowed fills up the intercoolers pretty good IMO. I did testing on another car where folks claimed that the LARGE intercooler I fitted was going to hurt spool - didn't show up in the datalogs I'd expect effect on torque to be much the same. I don't know if the Y-pipe would change things though honestly.

 

Your observation is right on. That's actually a great question. The car is mechanically unchanged except the ICs and Y pipe.

You can see that the power (TQ) came on sooner and peaked at 20 ft/lb higher. I'm not really sure why it spooled up quicker and made more TQ. Does less timing lower exhaust velocity, temperature or volume? and therefore spool? Behind the wheel, it was more snappy to throttle inputs and had more of a propensity to spin the tires as boost came on. But the car tended to lurch and buck a bit at less than cruise speeds. It was, in a word, too "racy" IMO. I bet some would like it that edgy. I found that it wasn't a good companion to the LW Flywheel.

The new tune is much more mellow. It's still obviously very fast, just feels more refined and controllable. It's running a bit less boost and I am betting a bit less timing. The overall torque output is much broader and that causes the higher HP peak. It pulls like a rocket.

Personally I'm happy to see it put down exactly 70 more wheel HP than a 997 GT2 on the same dyno. Keep in mind that this is a tune optimized for and tested with California 91 octane. GIAC said that's equivalent to 87 Octane back east..

The 104 Octane flash runs more timing and boost and is selectable with a hand held controller. There are also low boost, valet file and engine kill files.

 

As always our friend at GIAC- Making it happen............

 

Fabryce. You were reading my mind. I was going to PM you tonight. Garrett highly recommended your dog bone? kit (he has them on his car) to take out some rear camber and even out tire wear. Can you PM me a price? I'm running PSS9s and an H&R rear bar.

 

Ari... PM sent.......... We got ya covered

 

Sounds like a very well sorted out car Ari.