[Jack Gifford]

To further our knowledge-base of port flow of various Pontiac heads, Jim Robertson of R.A.C.E. has generously volunteered to put my spare M/T hemi head onto his SuperFlow bench. The delay has been at my end, since the head was only partially machined and it has taken me awhile to do some machining, install guides and seats, etc., but the head will finally arrive at the R.A.C.E. shop this week.

So- let's have fun trying to estimate (or guess!) what sort of flow numbers we'll see.

I won't bore you with all the details, but valve sizes are 2.00" INT and 1.94" EXH. One as-cast intake port will be flowed, and one intake that I've named "M/T hemi wide-port" (see photo). Exhaust is pretty much as-cast, with just bowl blending and guide massaging. At my request, Jim will get data on a 4.020" bore fixture, but will also do some testing on a larger bore. Due to hemi valve-collision considerations, flow beyond about .700" lift is not of interest.

No guesses from me... my limited exposure to flow-testing has taught me just one thing- that I can't tell by eyeballing an item whether it's any good or not!