LT1 aluminum head porting?

[LT1 aluminum head porting]

Hey Mike,

I have heard good things about your work and the time has come for some much needed headwork for my engine. The heads are 23* aluminum lt1 heads casting number 374 from years 93-96. I would like to put in 2.00/1.57 valves and have a full race port done on them. can you give me an idea of flow numbers at: .050, .100, .200, .300, .400, .500, .550, .600?

Thanks, also what would the intake ports size be after porting (cc's) and the combustion chambers (I'm assuming you unshroud the valves)

[Mike Stark]

The flow ends up around 280 cfm on the average. A real agressive porting will net a few more CFM (like 288-290), but the heads will only accommodate so much volume. The intake runner will be around 185 cc when finished. The chamber will end up any size you want after milling. I do unshroud the valves.