RCU Forums - View Single Post - OS91FX with tune pipe
Thread: OS91FX with tune pipe
View Single Post
Old 01-26-2007 | 02:53 AM
  #1  
Piet Le Roux's Avatar
Piet Le Roux
Senior Member
 
Joined: Apr 2005
Posts: 174
Likes: 0
Received 1 Like on 1 Post
From: BloemfonteinFree State, SOUTH AFRICA
Default OS91FX with tune pipe
I asked this question on the OS engine support forum but got no reply:

I have an OS91FX that I want to fit a tune pipe to. I have never done this so I am doing some home work first. I have tried to measure the exhaust port timing of the engine and according to my measurement it’s about 140 degrees. Can you give me the exact timing? Some sources say that an engine with a port timing of 140 or less does not do well on a pipe, has this been your experience?
Piet Le Roux is offline  
Reply Like