Speedzilla Motorcycle Message Forums - View Single Post - Questions for those designing exhaust systems
View Single Post
  #15 (permalink)  
Old 11-02-2009, 05:07 AM
johnyisthedevil's Avatar
johnyisthedevil johnyisthedevil is online now
chimp on my shoulder
 
Join Date: Aug 2007
Location: maryland
Posts: 1,954
Send a message via Yahoo to johnyisthedevil
Default

Quote:
Originally Posted by wibbly View Post
i always wondered about this... should the pipes be of equal length with a v-twin firing pattern? i can understand on an i4 but with a v-twin you wouldn't expect identical length pipes to create the same pulse tune... no?


maybe i'm just picturing it wrong...
true some extent as I understand it. a twin will inherently not scavenge as well or as evenly as a four, but I belive that is why your premium kits like Sato and Akrapovic use different sized pipe on one side. in order to increase the velocity a tad and make the rear cylinder "suck" for a slightly longer period of time. I digress though my twin tuning is pretty limited.
__________________
06 rc51 banzais, pcIII... the usual
94 vfr 750 cafe project
Reply With Quote