what cc to port to?
06-08-2005, 10:55 AM
#5
3.0 BAR
Join Date: Jun 2003
Posts: 1,558
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.
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.
06-08-2005, 05:08 PM
#6
1.5 BAR
Thread Starter
Join Date: Mar 2005
Posts: 728
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.
06-10-2005, 08:30 AM
#10
3.0 BAR
Join Date: Jan 2005
Posts: 2,877
Re: what cc to port to?
Originally Posted by Stealthmode
. I'd just have him clean up the ports and polish them. .
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
