What is this sound??? exhaust question

[BoxsterS21]

It won't harm the motor, it is just the way the fuel changes are.... Also I think it sounds great!

[Roosell]

I don’t know ****************e from Shinola, but that won’t stop me from offering an opinion. I think that sound comes from the throttle body closing the rest of the way. The throttle is electronically (as apposed to mechanically) articulated, no? I’ve noticed that my car has very little engine braking immediately after closing the throttle, but the braking increases if I stay out of the throttle for several seconds, like when coasting to a stop sign. My wild and unsubstantiated guess is that rattle is a harmonic phenomena having to do with the throttle body closing the rest of the way.


Or, it could be the muffler bearings.

[rob76turbo]

Originally Posted by Roosell

Or, it could be the muffler bearings.

Good one! I gotta remember that!

[yimmy149]

Originally Posted by Roosell

I don’t know ****************e from Shinola, but that won’t stop me from offering an opinion. I think that sound comes from the throttle body closing the rest of the way. The throttle is electronically (as apposed to mechanically) articulated, no? I’ve noticed that my car has very little engine braking immediately after closing the throttle, but the braking increases if I stay out of the throttle for several seconds, like when coasting to a stop sign. My wild and unsubstantiated guess is that rattle is a harmonic phenomena having to do with the throttle body closing the rest of the way.


Or, it could be the muffler bearings.

You might also be feeling the variocam changing to it's more conservative setting. But you may also be right about the throttle, I think there are some emissions requirements on preventing the throttle from closing too quickly.

-james

[yellowboxster01]

haha, that first clip is my car. I'm glad some of you think it sounds like a Civic, must just be the video. I get compliments a lot on the sound. It's coupled with cat bypass pipes now so it sounds even meaner. I'm up for something different now so, my Stebro race muffler will be for sale soon. I'm going with the PSE mod now to please a new passenger. She's annoyed by my exhaust and I'm annoyed by her constant displeasure with it.

It does have a reverse backfire to it that I love. I had it set up for the track a while back and it's mean!

Ah the beauty of human individuality. Life would be pretty boring if we all liked the same things!