Length of exhaust mainfold

[NemanjaGlisic]

Hello,

Can somebody help me, how can I determine the required length of exhaust mainfold for Yamaha R6 engine?

Thanks

[PatClarke]

Why?

Pat

[thescreensavers]

http://www.wallaceracing.com/Calculators.htm

http://www.wallaceracing.com/header_length.php

These formulas are from A. Graham Bell’s Performance Tuning in Theory and Practice and or Philip A Smith's Scientific Design of Exhaust and Intake Systems.

This might help you, though these formulas do not discuss wave order.