Limits of stock 1nzfe found once and for all. - Toyota Yaris Forums

DentGuy · 06-06-2012, 11:40 PM

When you start doing things like "knife edging" the crank or offset grinding the journals then it can really mess with the balance or a rotating assembly. The machine shop all of us local guys use (including Sound Performance and AMS) has never seen a 2J crank out of balance. During my first engine build I went over kill with the machine shop and had them do a dynamic balance of the entire rotating assy. (Wiseco pistons, Carillo rods, ATI damper, RPS carbon clutch) Guess what... it need no adjustments.
Now im no Yaris expert but it seems to me that a clean and centered install of the Main caps will free up more power than having that .0001 grams balanced out of the crank. Certain motors will benifit from the additional balancing (V formats mainly) but Inline engines dont inflict the type of counteracting forces on the crank that the V styles engines do.

06-06-2012, 11:40 PM	#1
DentGuy Drives: Supra Join Date: May 2012 Location: Algonquin Posts: 9	When you start doing things like "knife edging" the crank or offset grinding the journals then it can really mess with the balance or a rotating assembly. The machine shop all of us local guys use (including Sound Performance and AMS) has never seen a 2J crank out of balance. During my first engine build I went over kill with the machine shop and had them do a dynamic balance of the entire rotating assy. (Wiseco pistons, Carillo rods, ATI damper, RPS carbon clutch) Guess what... it need no adjustments. Now im no Yaris expert but it seems to me that a clean and centered install of the Main caps will free up more power than having that .0001 grams balanced out of the crank. Certain motors will benifit from the additional balancing (V formats mainly) but Inline engines dont inflict the type of counteracting forces on the crank that the V styles engines do.