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Automotive Monomaniac
Join Date: May 2002
Location: Los Angeles, CA
Posts: 4,209
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Strange rattle from 930 under full boost?
1986 930 - 120,000 miles
Under full boost (K-27 - 1 bar) as the engine pulls to redline, there is a strange 'rattle-like' noise coming from the engine. Could it be the engine 'knocking' (I am burning Chevron 91 octane)? Is this normal?
The noise is only apparent when the car exceeds approx .7 bar of boost (on it's way to 1 bar).
The engine runs fine, idles perfectly, and is smooth. Nothing seems out of the ordinary other than the noise.
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2018 - Porsche 911 Carrera 7MT / 2018 - Porsche Macan 7DCT / 1993 - Cadillac Allante / 2023 - RAM TRX (on order)
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