Yamaha Discussions about Yamaha ATVs.

Head flow questions

Old Oct 18, 2002 | 05:19 PM
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Default Head flow questions

What % of cfm can the intake flow over the exhaust?

Say my intakes would flow 365 and the ex. would flow 275 would this be a problem?
 
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Old Oct 18, 2002 | 06:58 PM
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Default Head flow questions

They are usually between 75-80% The higher you get the more likely you are to see a cam with a single pattern. Whereas, the lower percentage aids the exhaust with a split pattern.
 
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Old Oct 19, 2002 | 04:22 PM
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Default Head flow questions

What do you mean by single and split pattern? Thanks for the reply and help.
 
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