Start Up Exhaust Sound
You know when you first start the car up cold there is an explosion, all 4 exhaust valves open, then it closes 2 going into normal mode... well [MENTION=99]GT_Dave[/MENTION] explains this in my other thread:
When the car is cold and off, the valves for the inside pipes are 2/3 open, when you push in the clutch the valves will cycle closed , opened, closed and they do this 2 times which takes about 3+ seconds. If you want to start the car cold in "quiet" mode, hold the clutch in and count to 4 or 5 then hit the start button.
If you just push in the clutch and hit the start button, you will start in the middle of that cycle and you get the loud start.
When the car is warm, I'm not sure of the temps involved, the valves are shut and will not cycle when you go to start.
You know when you first start the car up cold there is an explosion, all 4 exhaust valves open, then it closes 2 going into normal mode... well [MENTION=99]GT_Dave[/MENTION] explains this in my other thread:
When the car is cold and off, the valves for the inside pipes are 2/3 open, when you push in the clutch the valves will cycle closed , opened, closed and they do this 2 times which takes about 3+ seconds. If you want to start the car cold in "quiet" mode, hold the clutch in and count to 4 or 5 then hit the start button.
If you just push in the clutch and hit the start button, you will start in the middle of that cycle and you get the loud start.
When the car is warm, I'm not sure of the temps involved, the valves are shut and will not cycle when you go to start.