Its just the seat being worn. Happened on my FA5 and will not be surprised if my FG4 does it in a few years, I'll just throw the brides in her.
Many thanks to adirdieselx64 for taking the time to investigate the source or the sound. I think its worth a shot. And I'd bet the 8thGen Civic is...
Sounded like two cog shaped pieces of metal spinning opposite ways making slight contact. Awful and loud. That's the best I can give you, or if you know what a walking flywheel sounds like.
First off I apologize for the lack of organization in this post, I'm sending it from my phone.
Note: this post regards the Si model
This isn't the first drivetrain related issue I've had (clutch master cylinder lost all hydraulic pressure, needed to be replaced at 3,500 miles).
Now at just...
Phewphh 13.5:1!!!! I am definatly sticking around to watch this build. Very impressive gains already! I'm glad you're going for an all motor build, I find them the most interesting, the most painstaking, and also the most rewarding. Good luck with the build and keep us updated!
I just pray that whatever Honda's brilliant engineers come up with, they sell it in North America! I don't mean some toned down slug version, I want the bad boy.