im nt a pro , bt wht i would like to say is , compressor wheel also promotes lag, its not all about the turbine wheel
if i was u , i will sure make use of the twin entry housing, is the banana tht u use designed for twin entry ? or is it hantam any cylinder to any entry of the turbine housing
like vr4 i know laa, 1jz firing order i dnt know bro :P , bt u can find in overseas forums for sure
i dnt tink there is a .63 t4 housing , try ask this guy
http://www.supramania.com/forums/showthread.php?t=902
he is using .68 housing