Im getting some bad vibrations in my '00 Si. (im not sure if its even turbo related, but thought i would post here as well to get your opinions?)
it vibrates from about 3,800rpms to 4.200 RPMs. after 4200 the vibrations seem to go away.

it will vibrate enough for me to feel it in the shifter and the gas pedal. it also what appears to me anyhow, will change the exhaust note slightly?

the car will vibrate regardless of if im standing stll or in motion. it vibrates if im at a light in neutral and i rev it up to 4k, just the same as if im cruising in 4th gear at 4,000 rpms.


Known instances that may or not be related:

-Did clutch/PP swap within the past 1,000 miles to a 6 puck unsprung
-Raced from a dig an LS1 RX7 and did not pre-load the axles, wheel hopped REAL bad
-No clicking from axles, inspected all CVs, no tears.

My thoughts:

torn motor mount?
flywheel bolts backing out?
something turbo related????? took off turbo, everything seems fine, no movement in the shaft.


ANY help is much appreciated!!!!

 

help