Suggestions for new design Aluminum Mopar SB clean slate (kind of) cylinder heads

rumblefish360 said
What is needed for any head to be sought after in the ability to be ported out further than most would expect.

Having the metal in the roof, (common) walls and short side to carve away is the key to future sales when the ability to port it out to the high heavens becomes known.

This was a problem with factory heads and some after market heads. In example the Edelbrock head ports out very good but the Speedmaster has metal in the places to spare that the Edelbrock doesn’t.

The Crysler/MP W2 & W5 port out really well but IMO, suffer on low lift flow. I can’t answer why exactly. Sorry in that one. The W5, suffered from crap unweldable aluminum but if casted well, people have reported flow in the 330’s+. I have a set of W2’s that went 323 cfm.

The hardest part is the pushrod pinch limitation of stock heads and the expense of gear to equip the head if it is moved. Such is the trials and tribulations of a head geared more towards racing than a replacement head that can perform.

How much down is the low lift flow in your W5’s??

As valve speed goes up and lift goes up low lift flow (with the exception of overlap) becomes less critical.

You can’t use a bad valve job and kill low lift flow and expect to make good power.

Also, at overlap the port pressure is much higher than 28 inches of WC. So the port may look bad (or maybe weak or weaker is a better term) at 28 inches but at 45 or 60 inches or even 100 inches if your bench can do the last two may prove out that the low lift flow numbers aren’t as bad as they look.