If built properly & shaved..they are just as good if not better than closed chamber heads..Plus I'm building more of a Faux 72 Q-code 351CJ Type Motor..Open chamber heads are what came on the 72-Q-code
Very interesting! I have limited knowledge on engine building beyond the Thermodynamic reaction in the piston itself so my knowledge is limited. I've been reading the 351 Cleveland book and it made it seem as though the stock 2V open chamber heads were pretty much garbage. I'd be curious to know what the modifications you make are that help them perform better
The 72 Q-code heads are 4v heads not 2v..The 2v heads are not garbage there's quite a few guys on the board who have used them with a 4v aftermarket intake (4v made to mate to 2v heads) cam.. with very good results..It all depends on what the intended purpose of the motor car is..Each has it's place..Read some of the stuff by George Pence..he goes into detail about the heads
http://www.351c.net/archive/?page_id=268 Don also posted up some great stuff by George Pence on the 351c
It's actually quite simple to use the open chamber heads..It just takes good parts & attention to detail..I'm shooting for a static 10-5-1 compression ratio..We have match cc'd the chambers..Installed Manley severe duty one piece valves..3 angle valve job..all valve stem heights have been matched..milling the head to achieve the desired compression ratio..ford motorsport bolt in roller rockers..lunati springs matched to the installed valve height..3/8" pushrods..Keep in mind I'm building a motor with a wide power band in the 380-420 hp range..
