raptor 660 r Posted October 16, 2008 Report Share Posted October 16, 2008 do you guys have pictures of various port jobs and what they are? i found that my jugs are ported and tryin to figure out what kind of port job it is? thanks! Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted October 16, 2008 Report Share Posted October 16, 2008 Post some measurements from the top of the cylinder to the top's of the Transfer ports and Exhaust ports. That will better help identify what type of port job you have. The intake pic's dont really mean much. That isnt where the power is made. Quote Link to comment Share on other sites More sharing options...
dajogejr Posted October 16, 2008 Report Share Posted October 16, 2008 Unless you can measure mm by eye, just looking at a port job won't do anything for you. You can tell if a stock cylinder has triple exhaust ports or boost intake ports, that's it. While everyone will ooh and ahh over a nice, clean, symmetric looking port job, that means nothing. I've seen cylinders that look hacked up run like a top, and "pretty" cylinders look like total shit... Quote Link to comment Share on other sites More sharing options...
brian Posted October 17, 2008 Report Share Posted October 17, 2008 Get yourself some dial calipers with a depth rod on them. Call Jim at Passion Racing Engines. He will tell you what to measure and how to measure it. With that info, he can tell you exactly what your port timings are and what that means to you (how it will run). You could probably call any number of builders and get that help. I just recommend Jim because he is a real straight shooter and has always been willing to take his time working with me over the phone (even when he wasn't selling me something). Good luck. Quote Link to comment Share on other sites More sharing options...
Wildcardracing Posted October 17, 2008 Report Share Posted October 17, 2008 What the hell, don't have your calibrated eyeballs in today??? lol. Quote Link to comment Share on other sites More sharing options...
Snopczynski Posted October 17, 2008 Report Share Posted October 17, 2008 Most builders I know wont go over that stuff over the phone because they have to use duration calculators, and it depends on a bunch of stuff like gasket thicknesses, deck height, etc....... to determine how a bike will run. Quote Link to comment Share on other sites More sharing options...
RollinRhino Posted October 18, 2008 Report Share Posted October 18, 2008 One way you can figure out volumetric efficiency and flow is to take it to a place that can test the overall flow of the ports. Once that is done all the math can be figured from that. Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted October 18, 2008 Report Share Posted October 18, 2008 post pics and ill guess. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.