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Writer/Teacher
Join Date: Mar 2001
Location: Wandering Connecticut
Posts: 9,296
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Interesting Noise on Full-Boost
I posted this in the Turbo forum, but the traffic in that forum just isn't as heavy as it is here...
I have noticed, specifically when it's cooler out, that when I go full-trottle and the turbo builds full boost, I hear a momentary, slight whining sound, which seems to correspond to the turbo building boost. Any ideas what this might be? It doesn't seem to be a problem, because the car is running great, but is it anything I should be concerned about?
there also seems to be either a something loose in the exhaust (or a loose heat shield), because I hear a rattling from the general mid-exhaust area (somewhere near the cat) at about 1200rpm
If it helps, my car seems to make the "interesting sound" with more weight in the car. For example, after I dropped off my bro tonight (230lbs), I noticed that the sound didn't seem to be occurring as often.
The noise sounds like how a chair squeaks when you pull it out on a hardwood floor sometimes
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Current Stable: Black 07 Porsche 987 Cayman S: Long-Tube Headers; FabSpeed Exhaust; VividRacing ECU Tune; IPD Plenum; 997GT3 Throttle Body. Blue 1983 Porsche 928S. 1985.5 Porsche 944 Rat Rod. 2011 Acura MDX. 2008 Mazda 3. Gone But Not Forgotten:Garnet Red 86 Porsche 951("The Purple Pig"). Alpine White 83 Porsche 944 ("Alpine Wolf"). Guards Red 84 Porsche 944.
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