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Intake/Head Porting
Posted: Sun Oct 18, 2009 10:16 pm
by racer12306
Just wondering if anyone who has ported a head or intake, beyond just the normal cleanup, has ever put these parts on a flow bench to match the flow on all cylinders?
Posted: Mon Oct 19, 2009 9:51 am
by hul kogan
Just normal cleanup and port match over here, but I would also be interested to see if anyone has spent some time on the flow bench.
Posted: Mon Oct 19, 2009 10:27 am
by Mat
No, flowbenching is spendy for us thrifty bastards.
But if you want to talk texturing, direction manipulation, and velocity theory, I can help with that.

Posted: Mon Oct 19, 2009 10:31 am
by racer12306
Only issue I see with not flowing these parts is a mismatch between cylinders.
Posted: Mon Oct 19, 2009 10:35 am
by Mat
If you're that worried about it, just be consistent with your porting method (start on the right, move to the left, etc) and record the amount of time it takes for each runner/port etc. That will get you close enough.
Posted: Mon Oct 19, 2009 10:54 am
by racer12306
There is a DIY flowbench on one of the forums i've been on, I think its GarageJournal, that I think would be neat to make.
Posted: Mon Oct 19, 2009 11:55 am
by occasional demons
racer12306 wrote:Only issue I see with not flowing these parts is a mismatch between cylinders.
Considering how the as cast ports look, you really can't do much worse.
IDK if I would use time as a measure, based on what I just said.
Possibly a better way, would be to use some kind of template, and measure the fluid volume of the port, with the valves installed.