what cc to port to?
 

what cc do you head porters go to on you runners in yourr d16a6's? and what angles do you go at on a 3 angle?

Re: what cc to port to?
 

no an no

Re: what cc to port to?
 

screw runner CC, pay attention to chamber CC.

The BEST upgrade you can do to a PM3 head flow is 78 mm sleeves.

Re: what cc to port to?
 

3 angle valve job....31,46,75(not sure about this one..I forgot) degree
and the valve itself..45 degree

Re: what cc to port to?
 

key thing to remember here.... DO NOT DO HEADWORK

Headwork is an exact science, and 99% of DIY work will hinder flow, not help. At most, you may clean up some of the casting marks, but unless you have a professional valve grinding machine, I suggest you have this work done. If you want better flow out of a SOHC non- vtec head, get one off a d16y7, it's got bigger valves already, so it'll be happy.

Plus what MistaBone said, bigger sleeves would offer less flow restrictions around the valves, thus improving flow. But without a flow bench to measure the head's efficiency, the CC of your ports means nothing, taper and texture are more important.

Re: what cc to port to?
 

i needed the info so that i could take it to the guy that im gonna have do my headwork (my grandpas good buddy that owns a machine shop), he doesnt have a flow bench in his shop and id ont think anyone else in my town has one either. the guy is used to workin on v8's, so hes not quite sure on doing work to a honda. ill probably just gasket match and polish the head.

Re: what cc to port to?
 

ya headflow is dependent on so many factors really a good valve job and basic light gasket match w/ bowl work will do fine

Re: what cc to port to?
 

who could i send the head to for a three angle. i was thinking about possibly using the exospeed stage one setup with the sr 909 cam. or would the dela 272 be a better choice?

Re: what cc to port to?
 

Any machine shop should be able to do a 3 angle vavle job. I'd just have him clean up the ports and polish them. Don't do any opening.

Re: what cc to port to?
 

i have always heard not to polish the intake ports so fuel doesnt form puddles, but wouldnt all the air you are moving when boosted solve that problem???