terms

[poobala]

I don't no what these terms refer to or how they help can someone explain ?
shuffle pinned
Knife edged crank or block
boattailed

[Tim Walsh]

I haven't built any motors (yet ) Shuffle pinned means that you put pins above (and below?) the main bearings so that at high rpms the 2 sides of the case done slide against each other, keeping it more stable.

Boat tailing is where you round some of the reinforcement within the engine so that air will move better within the case. It's supposedly good for about 10 HP according to Bruce A.

Just what I've learned from BA's book

[Superman]

Knifing a crank means trimming the counterbalancing lobes so that they produce less drag as they pass through the pool of oil in the sump. Since your engine is a dry sump system, this is not particularly important.