resources on porting/port timing
#1
I'm bastardizing my car!
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Location: Naperville, IL.
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resources on porting/port timing
i would like to learn about how the port timing on our engines effects torque and top end power. Iv searched around on the net and i really cant find anything that describes the relationships of port timing, port size and air flow. I would like to know enough so one day i could properly port an engine and know what im doing. I know the basic stuff, but nothing really technical about it. I know having a lot of overlap is going to take away torque and add top end if u have enough flow, but what is considered a lot of overlap? i would like to know how to calculate what RPM a port will make peak HP at and so on.
also, if anyone has any resources on intake manifolds on how to tune the plenum size and runner length for a target rpm on a rotary engine, that would be good too.
Thanks.
also, if anyone has any resources on intake manifolds on how to tune the plenum size and runner length for a target rpm on a rotary engine, that would be good too.
Thanks.
Last edited by OC_; 05-27-03 at 01:57 AM.
#3
Senior Member
Check out Yaw Power's technical articles. He does not publish how he ports his motors but from his articles it will give you a good start. You also might want to pick up an Automotive Math Book, I doubt there will be anything specific to a rotary engine in it but for intake manifold size/shape the math should be simular if not the same.
http://personal.riverusers.com/~yawpower/
http://personal.riverusers.com/~yawpower/
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