| For those of you that have followed my posts, I've basically finished my TT swap. I've noticed upon idling that the engine seems to rumble/shudder a bit. I was thinking of doing a power balance test, but I just wanted to mention a few things before pulling ignition coils and/or doing a compression test. I leak down tested all 6 cylinders from the JDM engine. It all looked pretty good. Nothing beyond 10-15% IIRC across the board. I am running with a light weight pulley and with a lightened flywheel (RPS segmented). The flywheel and clutch is actually the NA setup, which I believe is 10mm smaller in diameter. I also have new oem motor mounts. I feel a vibration that tends to go away beyond 1200rpm. I was just curious if that vibration is totally normal or could it be the lighter flywheel and pulley. Also, I didn't recall what the original orientation of the drive shaft was so I just connected it however. Also, point of clarification: why does the original orientation have to be restored if the drive shaft is already balanced individually by itself? 
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a new rumbling monster vg30dett ...no, seriously, rumbling? - 
