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dynoed my gt4 with and without fabspeed sport headers...
attached you will find the result.....
a little power increase 5 hp @7500 rpm... but a really good torque and power
increase @3600 and @5000 rpm....+13 hp and +25 nm circa
Here in Ontario, Canada, most insurance companies would void, cancel or refuse renewal of a policy if they discover a performance modification to your car. Exhaust and engine software tune would absolutely get you in full liability exposure and cancellation of policy.
There's even talk in Ontario to ban all non OEM modifications.
I had asked John the same question, and this was his email response:
"If you are running endurance races with a car and consistently running out the RPMs and holding it there, those headers are going to start running pretty damn hot and stay that way, so ceramic coating can be beneficial for vehicles like ferraris and lambos (and/or vehicles with rear diffusers/plates/covers keeping the bottom of the engine out of the airflow) where the headers are in very close proximity in the engine bay to fluids and electronics that can then start to overheat.
However, the majority of Porsches (including yours) are designed by Germans...typically enough said but I'll continue haha. Your engine bay is completely open at the bottom, and the aero under the front of the car helps direct the air straight to the back. This allows the heat from the engine and exhaust escape immediately into the airstream under the car and is blown away. This elevates potential overheating issues during extended track abuse with not only the factory exhaust, but aftermarket as well. On top of that, our quality T304L stainless steel is going to have better heat retention properties than factory, so more heat will escape out the pipes rather than being released into the engine bay.
All that being said, I would say ceramic coating is not necessary on your vehicle and for most Porsches under the majority of circumstances. For those heavily modified and living on the track and/or running aftermarket shielding/diffusers covering the engine, it may be a good thing for peace of mind.
However, always keep in mind that ceramic coating is an extreme process in regards to temperature, and covers the interior as well as the exterior of the exhaust system. This would be possible for race headers and straight pipe exhaust. Catalytic converters should not be subjected to this process for both the temperature and the fact that they will no longer function if the precious metals are coated, and typically the same would go for mufflers and resonators."
12-31-2015, 07:51 AM
