Buzzing Vibration past 4K RPM
Hi,
I've posted this on evom and I have yet to hear back from someone who has experienced an Evo 9 with balance shaft out of time. I got the car from a dealer in Illinois with the following mods:
- Buschur 2.3 Stroker
- HKS 272 Cams
- BBK Blue Full Turbo
- Exedy Twin Disk Clutch
- K&N Intake
- Precision 1000CC injectors
- Walbro 450
- K&N Intake
- ETS Intercooler
Now I'm leaning towards the problem is due to the balance shaft, oil pump being out of phase. Howver, because it's supposedly a 2.3L stroker engine, I doubt whoever built it left the balance shaft in it. It's not one of those cases where I went to get the timing belt changed and all of a sudden I heard this sound. I clearly know very little about the history of this car, and it's proving already to be a headache.
Here is a video of it: Caution: Video is loud! The vibration is more of a sound (I can't recall feeling too much of the vibration) and it gets worse with higher RPMs. In the video, you will notice just how bad it gets once it reaches past 6k RPM. I just want to know if anyone else have heard anything like this and it ended up being the Balance Shaft.
My other theory is that the block isn't built at all and does have a balance shaft that is out of time.
https://youtu.be/hrOUNO6zKCU