More photos of the emulator inside the car:



While in Arizona, we also tested our ultra-light straight pipe exhaust to determine what (if any) restrictions the stock side mufflers had with 3.9L of displacement. The results on our car were certainly interesting and we were able to eke out a little more performance and again save some weight (these are too loud for the street and designed for track-use only):


And finally, the results... Not too shabby eh?


93 octane fuel, three plots on this first graph:
1) SharkWerks / EVOMS 3.9L with complete muffler bypass.
2) SharkWerks / EVOMS 3.9L with OEM side mufflers and SharkWerks Bypass Exhaust.
3) Stock 3.6L 997 GT3 base map.

Stock catalytic converters, stock headers, stock intake. Tests performed in 4th gear. Todd created a different file specifically for the side muffler bypass pipes. The software needs to be modified due to the changes in exhaust back pressure: there is no such thing as one size fits all.


91 octane fuel test, three plots on this graph:
1) SharkWerks / EVOMS 3.9L with OEM side mufflers and SharkWerks Bypass Exhaust running 93 octane fuel.
2) SharkWerks / EVOMS 3.9L with OEM side mufflers and SharkWerks Bypass Exhaust running 91 octane fuel.
3) Stock 3.6L 997 GT3 base map running 93 octane.

A few things you can see- there's a big jump in tq/hp down low over a 3.6. This is very noticeable from the moment you drive. Where the factory cams/tuning begin to fall off this motor just keeps on going and going to 8800. In fact from peak power all the way to 8800 there's only a loss of 5hp. This gives you more revs to play with and you start off with more power in every gear between shifts. An even more usable powerband.

It's been a fun journey getting to this point and we really feel like we've not only upped the displacement but in doing so have managed to keep the integrity and character of the GT3 motor. It actually revs even quicker and snappier than a factory 3.6 with LWF. She idles great, runs without any compromises and (to prove we're really green after some light-load fine tuning) actually managed to return on the journey home averaging 25.4mpg (a stock car going 75mph along the 5 freeway yielded 24.4mpg).

For those interested in pricing and more details please see our product page or contact us. Only SharkWerks and Evolution Motorsports will be performing this upgrade, so your car can be sent to either location.

The car really is peppy and a few local guys have already tried it (JWGT2, SnowBoarder54, Tony@TCDesign etc...) and the response has been good from these guys who we all look up to.

We'll have the product page/pricing info shortly but we're looking forward to doing it again to a certain silver 07 GT3 with 33K miles in about a month.