996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.

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Old 04-02-2004 | 08:18 PM
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You're not going to believe this!

Hey all,

Just got back from a half day trip to AWE tuning for their new 996TT Exhaust (BTW: Todd, Mike, Seth, Brian and the rest of the crew, YOU GUYS ARE GREAT and a pleasure to spend money with) :-).

Sound is awesome in my opinion...nice rumble and not obnoxious in anyway...can't wait till it "breaks-in" completely for the real sound to come out. I hear a loud version is in the works for those who like a little more "noise".

Weight appears to be MUCH lighter than stock but I never actually weighed both. Quality is top notch.

Performance: Here's where you guys are not going to believe it. (I used my last dyno in December as a baseline) I have a X-50 car with Upsolute chip ONLY; stock everything else. I dyno'ed 437.0 HP to all four wheels with 446.0 TQ. After just installing the exhaust with absolutely no other modifications, I dyno'ed 496.X HP and 497.X TQ. I understand there will be slight difference given the temps, humidity, bar. pressure, but needless to say 60HP to the wheels is UNBELIEVABLE! The car is now a beast but a civilized one. Power appears to come on more smoothly (linear) and the music out of those pipes are sweet. I hope Todd can post the before and after dyno sheet as I don't have them, but this experience was eye opening.

I just thought I'd share my enthusiasm for a great product from a great company...thanks for bearing with me!

Disclaimer: No affiliation, unfortunately I had to pay for all my stuff, etc. etc. etc...just a happy customer
 
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Old 04-02-2004 | 08:48 PM
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Wow!!! That's great Vin...What about the 993TT???
 
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Old 04-02-2004 | 09:01 PM
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Hey Chris,

AWE Tuning's exhaust for my 993TT (3 inch version)...Before doing the exhaust the car dyno'ed 376.X HP 399.X TQ to all four wheels on AWE's mustang dyno. The car has K-24, GIAC program, Cargraphic's intercooler, CAT BY-PASS Pipes from Cargraphics (which is now for sale :-)), and 5 bar fuel pressure regulator, Cargraphics GT oil cooler.

Sound: Amazing mean rumble and positive comments EVERYWHERE! Quite a bit louder than stock but not overly excessive. I personally like stealth and prefer quiet but the sound is so sweet I love hearing it rev. Louder than 996

The Exhaust is again tops in terms of quality...I got the header system with heat exchangers and exhaust where the 300 cell cats are IN the mufflers. ie NO MORE CHECK ENGINE LIGHT. The exhaust cuts down the length of the entire system meaningfully...I don't remember the numbers but I think 17 or 11 feet to just 4-6 feet (PLEASE CORRECT ME MIKE). Whatever it was, it was significant (MUCH LIGHTER THAN BEFORE).

Performance: The car drives like a bat out of hell now and just keeps pulling (mostly top end car vs 996). The car dyno'ed 400.xHP and 402.xTQ With CATS added back in, on the same dyno! 24 Wheel HP gain! I can say I'm a happy camper again and kudos to Mike, Kenny, Todd and the rest of the AWE Tuning team. All of you are a class act. Hopefully Mike can post the before and after dyno sheet here again.

Are you coming early Chris? If you need a place to stay, let me know.
 
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Old 04-02-2004 | 09:08 PM
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Thanks Vin for the offer to stay...The weather is not going to be a problem, so I will be departing at 4:00 AM for a leasurely quiet drive down and arrive around 6:30 after I top the gas off in NY. See you Sunday....
 
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Old 04-02-2004 | 09:08 PM
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When will it be available? Pricing?
 
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Old 04-02-2004 | 09:14 PM
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Vinnie,

Not trying to rain on anyones parade, but are you sure the dyno runs are using the same power factors? Corrected, uncorrected, which SAE, etc.
 
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Old 04-02-2004 | 09:18 PM
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Yeah I was going to say, 60hp from an exhaust swap is almost unbelievable. I've never seen anything like it, unless you compare the difference of stock vs free flowing exhaust on a *highly* modified car that flows substantially more air than stock.
 
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Old 04-02-2004 | 09:20 PM
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CJV,

You are absolutely correct about power factors et. al. (I APOLOGIZE) In my childish enthusiasm, I just assumed they would have kept those factors they could constant with the prior run. Only Mike, Todd, or Brian can answer those questions and I hope they speak up! I am sorry if I was being misleading...I was just excited.
 
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Old 04-02-2004 | 09:34 PM
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Vinnie,

Nothing to be sorry about. They may be the same correction factors. I don't know. It is simply a clarification question.
 
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Old 04-02-2004 | 10:50 PM
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60 WOW!!! thats great CONG...
 
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Old 04-03-2004 | 07:23 AM
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Thanks Chad,

I would like to know for myself as well. Any help AWE-Tuning?
 
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Old 04-03-2004 | 08:25 AM
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Hi Vinnie,

All dyno runs we do on our Mustang MD-AWD-500-SE dyno are corrected to SAE standards for ambient temperature and humidity. We do not correct for barometric pressure with turbo/supercharged cars as it artificially skews the numbers (since ambient air pressure has little effect on a boosted engine).

We are using our own 996TT in the next couple weeks as a test control to verify the exhaust gains we saw on Vinnie's car. Right now we are in the middle of a comprehensive K16 product development program and have seen upwards of 25 wheel hp uncorking the chipped K16s with our system.

What we really like about our design is that it accomplishes these phenomenal gains with the use of 300 cell metal cats, ensuring long term emissions compliance and no check engine lights. We have done testing with 100 cell and test pipe sections and seen very minimal gains, though we will offer both as options to the completed system. Sound volume is extremely civilized, too, and the tone is befitting a car of this caliber.

Anticipated final release price is $3695 for the complete muffler with cats, and $200 additional for track test pipes to replace the cat sections.

See K16 dyno sheets and more info here:

AWE/McNeil Competition 996TT Exhaust


I'll post your dyno sheets on Monday, Vinnie, when I am back in the office.

Glad you are satisfied with the results!
 
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Old 04-03-2004 | 08:54 AM
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Todd,

There are two SAE standards. One uses an ambient air temperature of 74 or 76 degrees while the other uses an air temperature of 12 to 12 degrees less. This makes a fairly big difference in the numbers. Nothing wrong with either one except you have to compare apples to apples, otherwise people come away with a distorted view. Which one are you using?
 

Last edited by cjv; 04-03-2004 at 08:58 AM.
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Old 04-03-2004 | 09:06 AM
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We always use the same formula (SAE J1349 Revision JUN90), which is based on ambient air temp of 77 deg F, 29.235 Inches- Hg barometric pressure, 0% relative humidity. All we have to do is input the measured values into the appropriate fields before we do a pull.

The SAE J1349 Revision JUN90 correction standard is used on all dynos I am familiar with that intergrate weather variables. What is the other one you are referring to?
 
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Old 04-03-2004 | 09:10 AM
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Todd,

The June 1990 revision is the toughest one. The other is called SAE Standard Corrected. Many tuners and part manufacturer's use it because it makes their products look better.

Any dyno I have used, by keying into the computer, can give you either of the SAE's, DIN, or uncorrected.
 

Last edited by cjv; 04-03-2004 at 09:14 AM.


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