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Discussion Starter #1
There already is a different sound to the different modes so what will the engine note program consist of?
Additional control via software ? Dealer adjusted or owner adjusted ?
Does anyone have a clue ? I am obviously clueless.
 

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HI Grappa

I have completely disassembled the stock OEM McLaren Mp4-12C factory exhaust syste. It is quite simple in design and has no exhaust valves or vacuum actuators.

The changes in sound and loudness therefore must be due to changes in sport settings in which the cams and other valvetrian events are moved around according to track / sport settings. The exhaust is a staic system with 2 cayalytic convrters on each exhaust bank and therefore 4 total catalytic converters.

best regrads
Joe Fabiani
 

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its simple , you will be allowed to manually adjust the sound coming into the vehicles cockpit through the tube whatsit thingy .
 

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Discussion Starter #4
So how is the sport exhaust different from the standard ? Is it just the fake-out induction sound ?
It's beginning to sound like the sport exhaust and the dash settings are just there to make the driver have a little aural stimulation.
 

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Sports exhaust is made of Iconel and is lighter than standard exhaust, and the sound OUTSIDE the car is louder. INSIDE the car, you're hearing the Induction Noise Generator (ING), whether you have the standard or sport exhaust.

Currently here are three levels of ING, selected when using the [P]erformance toggle. In [N]ormal mode, the ING is OFF. In port mode, the ING is set to a a medium-ish level. In [T]rack mode, the ING is at it's loudest.

I'm assuming that "programmability" means that you'll be able to select the level of sound from the ING separate from the [P]erformance toggle setting (i.e., you'll be able to have the ING "off" in [T]rack mode).
 

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So how is the sport exhaust different from the standard ? Is it just the fake-out induction sound ?
It's beginning to sound like the sport exhaust and the dash settings are just there to make the driver have a little aural stimulation.
Sport exhaust is louder from the outside of the car. It's not fake sound induction.
 

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Sport exhaust is louder from the outside of the car. It's not fake sound induction.
...but it's quite hard to hear the difference from inside the car, especially in [T]rack mode, where it's hard to hear anything over the ING...
 

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The McLaren Mp4-12C factory exhaust consists of Left & Right catalytic converter pipes that have 2 catalytic converters on each 1/2.

These go up top and use a ball clamp to attach to the rear final exhaust system that has integrated stamped exhaut tips or funnels as I call them.

The rear base exhaust is a corrugated small muffler/ resonator and the optional sport exhaust is a simple H pipe design. Dont get angry at me...............but the H pipe is excatly like guys used to install on American muscle cars like Chevelles and Chevy Novas to enhance low & midrange torque. My engineer and I speculate that McLarens H allows some sound deadening as it ties together both engines exhaust banks and also mellows out the sound.

200 Cell sports race catalytic converters at the Turbs along with a resonators up to and a X pipes would drastically wake up both sound and power as it does on all other Twin Turbo cars.

Playing with the switches and controls in the cockpit should still change the sound and enhance the entire experience.
 
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