EXPERTS! What happens at 2.6k RPM?
05-20-2019, 12:34 PM
#1
Track Day
Thread Starter
EXPERTS! What happens at 2.6k RPM?
Driving with the windows down...
...I noticed a metallic 'SCRATCH' that happens EVERY TIME I pass the 2.6k RPM level while cruising (2nd gear, throttle less than 25% open)
on a gradual ACceleration from 2k to 3k--I hear it
on a gradual DEceleration from 3k to 2k--I hear it
on a sustained hold of 2.6k--I hear it
DESCRIPTION OF SOUND - If were to you take a piece of aluminum foil and quickly crumble it in a ball (all in 1 beat)
I can hear it clearly from drivers side mid/front of car, but you probably wouldn't notice it if you drove it and I didn't tell you about the sound.
It definitely sounds like something is mechanically switch on/off/, opening/closing.
Does anyone know what this could be?
it's an 07 6MT Sport Chrono PCCB
...I noticed a metallic 'SCRATCH' that happens EVERY TIME I pass the 2.6k RPM level while cruising (2nd gear, throttle less than 25% open)
on a gradual ACceleration from 2k to 3k--I hear it
on a gradual DEceleration from 3k to 2k--I hear it
on a sustained hold of 2.6k--I hear it
DESCRIPTION OF SOUND - If were to you take a piece of aluminum foil and quickly crumble it in a ball (all in 1 beat)
I can hear it clearly from drivers side mid/front of car, but you probably wouldn't notice it if you drove it and I didn't tell you about the sound.
It definitely sounds like something is mechanically switch on/off/, opening/closing.
Does anyone know what this could be?
it's an 07 6MT Sport Chrono PCCB
05-20-2019, 01:45 PM
#2
Three Wheelin'
Happened to me on my 997.1 Carrera also right at 2.5k rpm. Turned out to be a loose exhaust tip bolt. Snugged it up and that got rid of the sound.