Imagine Auto Inc. – 913 310-9927 996TT / GT2 Exhaust Comparison An ImagineAuto Inc. Presentation...

Imagine Auto Inc. – 913 310-9927

996TT / GT2 Exhaust Comparison

An ImagineAuto Inc. Presentation

August 7, 2003


A baseline set of testing methodologies was determined and communicated to all manufactures prior to the tests.

Consistent testing methodologies ensure accurate, comparable results were achieved. Although different test scenarios would have produced higher or lower numbers, these methodologies and scenarios ensure the results are comparable from muffler to muffler.

• A 2001 Porsche 996TT with 20,000miles, stage 4 ECU upgrade, and K24 turbos was used.

• A minimum of 50 miles was put on the car with each muffler to account for ECU calibration

• Dynojet 248 Dynamometer

• DB tests were taken 12 ft from rear of the car by a Radio Shack Digital db Reader part number 33-2055

• Backpressure tested 3” post turbo and 3” pre cat

• 3k constant load pulls were done on the dyno, under part throttle load.

• SAE HP correction was done based on weather station information. The correction factor for all runs was 1.06-1.07DIN.

• Intake temperatures were held to within 10 degrees F

• Resonance is judged on whether or not a conversation can be carried on with someone in the back seat.


Factory 996TT Exhaust - FREE

DB Interior DB Exterior

Idle – 84db 81db

3k – 96db 93db

WOT – 101db 97db

Statistics

Weight – 54lbs

Backpressure 6.3lbs

AFR – 12.2

Weather Station information

Absolute pressure - 29.01in.Hg

Air intake temp – 101.2 degrees F

Vapor Pressure - .51in.Hg

Correction Factor – 1.07DIN


Europipe 996TT Exhaust - $4,410


Idle – 69db 91db

3k – 86db 103db

WOT – 91db 109db

Statistics

Weight – 54lbs

Backpressure 2.5lbs

AFR – 12.5






If the factory were to ever make a high performance muffler this would be it. The workmanship and quality is certainly what you would expect from a European product. The muffler is well packaged and the unit is sold with several goodies such as an angled wrench and handle to ease installation. Exhaust tips are also included in the package and for a small fee can be upgraded to the X50 look.

Sound is sometimes hard to put into words. Imagine a throaty sound and a slight rasp under full acceleration. The muffler sets the standard for pleasant sound and zero resonance. There is a sound presence through the midrange, however it just reminds you that the muffler is there.

The Europipe muffler’s claim to fame is the large 70mm pipes compared to the factory's 60mm. The system is rather bulky and compares to the factory muffler in regards to weight and difficulty of installation. A 2 Year warranty is included


Fabspeed Sport 996TT Exhaust – $3,495


Idle – 88db 89db

3k – 101db 96db

WOT – 104db 100db

Statistics

Weight – 35lbs

Backpressure 2.25lbs

AFR – 12.2


Absolute pressure – 29.03in.Hg




Designed around the single canister version, the new Sport Quiet is just that – quiet - compared to its predecessor. The exhaust utilizes the separate cat system and attachment based on V-band clamps. If you are upgrading from the Super Sport, the system can be interchanged in about 15 minutes leaving the cats in the car. The quality is consistent to other Fabspeed products with that same impressive mirror polish.

The overall sound of the Fabspeed Sport Quiet is pleasant. If the Fabspeed Super Sport is too much for everyday driving, this one may be just right. Resonance is slightly detectable around the 2500 mark. This muffler doesn't prohibit any conversation or create an annoyance for daily driving. The system sounds throaty with a hint of burble on deceleration. Full acceleration produces an exotic howl that will make those standing on the curb look up.

System includes V-bands, aircraft clamps, muffler straps and hardware.


Fabspeed GTII Super Sport 996TT Exhaust - $3,495


Idle – 88db 94db

3k – 102db 101db

WOT – 104db 110db

Statistics

Weight – 30lbs


AFR – 12.3






As one of the first aftermarket vendors to offer a replacement muffler for the 996TT, Fabspeed has shown to have scaled the learning curve and is confident in the performance of their product. The original GTII Super Sport is a three-piece design that utilizes separate 100 Cell German cats. The system uses the V-band clamp system for faster on and off access and install time. The system has been updated since its original debut through a restructuring of the mounting brackets and a small design change to lower resonance levels. Overall quality is nothing less than FabSpeed has shown us through the years.

This system is not for the faint of heart. The Super Sport GTII does resonant and lets you and your surroundings know you mean business. If you enjoy the raw sound of the turbos spooling up and the backpressure flutter, then this system would be ideal.

The muffler is constructed from 63.5 T304SS and the kit is equipped with V-bands, mounting brackets, tailpipe pieces and aircraft quality clamps.


Fabspeed Sport Track 996TT Exhaust - $495 (requires Fabspeed cats)


Idle – 85db 88db

3k – 108db 104db

WOT – 105db 114db

Statistics

Weight – 11lbs


AFR – 12.5






If you have the Fabspeed Sport or Super Sport these pipes are a must. They are designed to attach directly to the cats and allow a dual muffler bypass. The system is interchangeable in about 15 minutes even under the hottest conditions. We changed this system out with a set of gloves on the dyno.

Anyone headed to the track or drag strip will appreciate this option.


GHL 996TT Exhaust - $2,900


Idle – 90db 96db

3k – 102db 98db

WOT – 107db 106db

Statistics

Weight – 30lbs

Backpressure 3lbs

AFR – 12.2






New to the scene, this muffler is actually two systems. The cats are separate from the mufflers and instead of one common canister, two separate mufflers are used. 100 Cell metal media cats are piped into a 3-inch pipe then to the muffler. The tailpipe is necked back to factory size to allow for factory fitment of the tips. Installation of this muffler is as easy as it gets. Because of the separate mufflers and removable cats the system can be installed in less than an hour. The quality and welds of these mufflers are definitely from the upper echelon of the aftermarket world. Almost unheard of is the lifetime warranty this muffler carries.

The GHL sound is rather unique. It carries a hollow throat and a high-end rasp that is much different than factory. It is noticeable but not overpowering. GHL mufflers are known for no resonance and that was very clear to the ear. The muffler is equipped with support straps and is constructed from T304SS.


RUF 996TT Exhaust - $5,900


Idle – 80db 92db

3k – 88db 95db

WOT – 92db 100db

Statistics

Weight – 53lbs

Backpressure 3lbs

AFR – 12.4






As you would expect from RUF the presentation is first rate. RUF starts with a factory muffler and retools it to their specifications. The muffler quality is good given the majority of it is factory. Cats and the original outlets are removed to accommodate RUF's signature two-pipe outlets. The rest of the design is kept secret by the German designers.

Sound is excellent. It is as quiet as a factory muffler with a little more emphasis on the flutter and throat that you can just barely detect on the factory system. The muffler maintains the factory lack of resonance and is barely audible driving down the road. The system is supplied with all new nuts and gaskets. Due to its size, installation is awkward just as on the factory muffler.We would like to point out that this muffler can be purchased separate of the RUF system, however it is very clear that the muffler has been designed to work particularly with the RUF setup. This is important to note when studying the performance test results.

NOTE: A factory muffler baseline was rerun after the RUF test since the RUF produced unexpected low results through the midrange. The baseline was identical to the first baseline. The results are unexplained and may represent a problem with just this particular muffler.


Turbo-Exhaust.com 996TT Exhaust - $2,000


Idle – 85db 92db

3k – 110db 105db

WOT – 104db 110db

Statistics

Weight – 12lbs

Backpressure 2lbs

AFR – 12.3






These mufflers are based on modified stock systems. Seven versions exist and are based on minimal backpressure, minimum weight and maximum HP. Wrapped in thermal blankets the systems get the energy out of the muffler as fast as possible. Installation is as simple as it gets because of the size and lack of weight. It actually took more time to hook the 02 sensors up than it did to install this system.

Sound is not what this muffler had in mind when designed. Built around track use these mufflers are quiet enough to pass track db limits. They do carry resonance in most RPM ranges inside the interior. All of which is not an issue on the track or under a helmet. For the cost, no one can complain.


All Exhaust Summary - HP


All Exhaust Summary - Torque


HP & Torque Summary

Exhaust 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000 AverageTurbo-Exhaust.com 128 195 277 391 458 470 484 474 457 454 365.0Factory 125 182 247 338 429 448 452 440 437 419 346.0Europipe 145 213 305 409 429 455 452 464 440 439 351.0Fabspeed Sport 120 173 248 363 453 469 476 483 467 454 371.5Fabspeed GTII Super Sport 128 190 271 384 447 461 463 469 452 442 376.9Fabspeed Sport Track 127 189 274 385 466 493 487 490 462 402 400.0GHL 121 177 250 365 438 458 470 460 440 427 357.4RUF 136 200 274 363 404 415 425 427 438 419 361.0

Exhaust 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000 AverageTurbo-Exhaust.com 270 341 416 514 535 494 462 415 369 341 417.5Factory 263 319 371 444 501 471 431 385 354 313 388.5Europipe 305 372 458 437 500 478 432 407 356 328 413.0Fabspeed Sport 252 303 372 477 529 493 454 423 378 338 410.3Fabspeed GTII Super Sport 268 332 407 504 521 484 442 411 365 334 418.3Fabspeed Sport Track 271 330 411 505 544 518 465 429 373 302 433.8GHL 255 310 375 479 511 481 448 402 440 427 396.7RUF 284 350 411 476 472 436 406 374 354 317 400.9

HP

Torque


Turbo-Exhaust.Com vs Stock

Turbo-Exhaust.Com Exhaust Comparison

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Turbo-Exhaust.com Torque

Factory Torque


Europipe vs Stock

Europipe Exhaust Comparison

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Europipe Torque


Fabspeed Sport vs Stock

Fabspeed Sport Exhaust Comparison

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Fabspeed Sport HP

Factory Torque

Fabspeed Sport Torque


Fabspeed GTII Super Sport vs Stock

Fabspeed GTII Super Sport Exhaust Comparison

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Fabspeed GTII Super Sport HP

Factory Torque

Fabspeed GTII Super Sport Torque


Fabspeed Track vs Stock

Fabspeed Sport Track Exhaust Comparison

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Fabspeed Sport Track HP

Factory Torque

Fabspeed Sport Track Torque


GHL vs Stock

GHL Exhaust Comparison

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Factory Torque

GHL Torque


RUF vs Stock

RUF Exhaust Comparison

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RUF Torque

Imagine Auto Inc. – 913 310-9927 996TT / GT2 Exhaust Comparison An ImagineAuto Inc. Presentation...

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Transcript of Imagine Auto Inc. – 913 310-9927 996TT / GT2 Exhaust Comparison An ImagineAuto Inc. Presentation...