Originally Posted by dynamomark
so its best to just polish everything, drill more holes in the housing, de-spring, and de-volume the ram assembly.
This. Simply polishing and porting a ram will yield incredible gains. Plus with the noid being directly manifold mounted, not a lot of air restriction that a qv would clear up. Any gains with a QEV would be superfluous, like going from 26 to 30 bps or something.
VDub has a really informative ram data post on ICD-O, you should check it out. Match a polished ram with a nice valve, that's all you need.