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Fast Intentions exhaust is here! (continued)

Originally Posted by cooltoy Hiss? What hiss? I don't hear it. Please explain. You don't get a hiss when coasting? Especially downhill? Seems to happen most as the engine holds

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Old 10-10-2014, 03:44 PM   #1 (permalink)
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Hiss? What hiss? I don't hear it. Please explain.
You don't get a hiss when coasting? Especially downhill? Seems to happen most as the engine holds the car back.

It sounds like more of a sucking sound than a leak. Although I've never heard it explained as to what it actually is.
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Old 10-10-2014, 03:54 PM   #2 (permalink)
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The hiss could be harmonics in the exhaust from the VVL changing positions. Best guess.
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Old 10-10-2014, 04:12 PM   #3 (permalink)
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Originally Posted by scottIN View Post
You don't get a hiss when coasting? Especially downhill? Seems to happen most as the engine holds the car back.

It sounds like more of a sucking sound than a leak. Although I've never heard it explained as to what it actually is.
I'll try to listen for it.
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