hay peps i just got my self an a14 and sc14 toyota supercharger if been readin lots or forems and im just wondering wot would be the best bits to run like gearboxes diffs tailshafts crank pistons rods

i was readin in 1 of the forums of here about supercharging an a15 and thay were torking about using an a14 crank to lower compression would this be the same with the a14 using the a12 crank lol

Wouldnt changing the crank change the displacement not the compression ratio?

If you run an A14 crank, with A15 pistons you get a piston height 2.5mm below the deck. This gives a CR of around 7.22:1 depending on combustion chamber volume. A head saver shim is a lazier way of dropping the CR. From what I've been reading lately, You could try leaving the CR standard and just run H20/Methanol injection.