Ex. to In. ratio
Thread Starter
TECH Veteran
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Joined: Nov 2003
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From: Tallahassee, FL
Ex. to In. ratio How do you come up with the exhaust to intake ratio?
Also, is it anything under 400ci should try to see a 75%?
Any help would be appreciated,
Thank you.
Also, is it anything under 400ci should try to see a 75%?
Any help would be appreciated,
Thank you.
On The Tree
Joined: Aug 2004
Posts: 150
Likes: 0
You divide the Intake flow into the exhaust flow. You will then see what kind of cam to use. If the ratio is around 75% use a single pattern cam, if it is lower start looking at splits with more exhaust lobe and vice-versa on above. That is what I look at on the ratio and the importance of knowing it. So if you have some heads that have a kicking exhaust port but the intake is not as good then start looking at cams like 230/224 just as an example.
