Is the buzzing knock?
#1
Is the buzzing knock?
I've had a buzzing/minor vibration sound around -5inHG to 0psi in the 4000rpm range since I installed the turbo in January. It used to buzz in the -9 range before I calibrated my map sensor. I always thought it was something minor in my ecu settings or maybe a faulty wastegate or bypass valve since it was close to boost.
I didn't think it was knock since it didn't sound like a knocking sound, wasn't in boost and my settings were supposed to be conservative, but I recently saw a thread where someone said knock could sound like buzzing. My timing is at 18-19 in that map/rpm range and I've tried lowering it to 15-16 to get rid of the knock to no avail. My AFR is around 12.5, when it runs a little leaner 12.8 is when I hear it more often. I thought 12.8 was pretty rich for 0 psi.
Do you think it's knock or something else? If something else, whats a common buzz that happens at -5inHG to 0psi?
I didn't think it was knock since it didn't sound like a knocking sound, wasn't in boost and my settings were supposed to be conservative, but I recently saw a thread where someone said knock could sound like buzzing. My timing is at 18-19 in that map/rpm range and I've tried lowering it to 15-16 to get rid of the knock to no avail. My AFR is around 12.5, when it runs a little leaner 12.8 is when I hear it more often. I thought 12.8 was pretty rich for 0 psi.
Do you think it's knock or something else? If something else, whats a common buzz that happens at -5inHG to 0psi?
Last edited by PhantomRoadster; 12-01-2010 at 10:43 PM.
#9
not sure if this helps identifying the noise ur hearing
http://www.theknockbox.com.au/content/view/8/8/
http://www.theknockbox.com.au/content/view/8/8/
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