DADEBOYRACER101 Posted March 8, 2007 Report Share Posted March 8, 2007 how do these mechanics do port and polish........... like drag porting and trail whats the diffrence and how do you do that Quote Link to comment Share on other sites More sharing options...
Bansh-eman Posted March 8, 2007 Report Share Posted March 8, 2007 the differance is angles and the amounts off metal taken out of certian ports.. they have a hi speed grinder... a dremel doesnt cut it... also they have angled handles to get into the transfers you cant get to with a stright dremel... Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted March 8, 2007 Report Share Posted March 8, 2007 i highly doubt youre gonna get any specific measurements on anything.. thats how builders stay in business. they dont tell everyone their secrets.. Quote Link to comment Share on other sites More sharing options...
Duner440 Posted March 8, 2007 Report Share Posted March 8, 2007 Chainsaw! JK Quote Link to comment Share on other sites More sharing options...
dajogejr Posted March 8, 2007 Report Share Posted March 8, 2007 i highly doubt youre gonna get any specific measurements on anything.. thats how builders stay in business. they dont tell everyone their secrets.. Think of an engine builder as a world famous chef... They're not giving up their secrets...and it's something they...as well as their family or predecessor took years perfecting. You can get the directions how to bake a cake on the back of the box, but...the career chefs know there's a lot more to it than that.... Quote Link to comment Share on other sites More sharing options...
Dinner Posted March 9, 2007 Report Share Posted March 9, 2007 There are quite a few calculations involved as well. Finding out Velocity flow, cc's, everything. As others have said it's an art. It takes years and years of practice, recording, and understanding what works and what doesn't. And a lot of money to go through cylinders. Quote Link to comment Share on other sites More sharing options...
Washburn Posted March 9, 2007 Report Share Posted March 9, 2007 On a 2 stroke you have to keep the port hights rite on par with the desired RPM range. If you raise the exhaust or intake to high it will only be a top end motor. There is a science to it. If you want to try it yourself Im sure you could buy a template off a known buildr but you would have to have the rite tools. Quote Link to comment Share on other sites More sharing options...
bentvalve Posted March 9, 2007 Report Share Posted March 9, 2007 you know that seems kinda funny, but this is true all through motorsports. i have a 1500hp turbo mustang and the cam in it was ground by crane for turbo people in new york and there is a number on the crank but they will not tell you what it is. all i know is that the lift is like .836. jobe spetter has top secret cams..lol. Quote Link to comment Share on other sites More sharing options...
FireHead Posted March 9, 2007 Report Share Posted March 9, 2007 the differance is angles and the amounts off metal taken out of certian ports.. they have a hi speed grinder... a dremel doesnt cut it... also they have angled handles to get into the transfers you cant get to with a stright dremel... Don't forget port timing and location (sort of related). They adjust that as well. :thumbsup: A 5 axis CNC mill is my weapon of choice for porting. :thumbsup: Quote Link to comment Share on other sites More sharing options...
2003LimitedBanshee Posted March 9, 2007 Report Share Posted March 9, 2007 i highly doubt youre gonna get any specific measurements on anything.. thats how builders stay in business. they dont tell everyone their secrets.. In general loco I would agree with you, but I received some great (but unexpected, true) advice from one of the builders over on PS. He actually went so far as to post port timings, durations etc. What the others have said to an extent is true also. You have to understand the theory for the numbers to make sense. Here is the link to that thread (sorry to pull it away from BHQ), although I'm not sure you may have to be a PS member to read it...? http://www.planetsand.com/forums/ubbthread...true#Post421460 Also, as mentioned expect to spend more money getting setup to port your own cylinders than if you were to just send them out. I have about $700 worth of porting tools that I have accumulated and I am in the market for a few more pieces. Compare that to Jeff at FAST which I think runs in the $300-400 range for a dune/play port job. But, I get the satisfaction of saying that I ported my own cylinders. The other thing I will say is that if you understand port timings and have some basic flow principles you will probably be able to identify areas where the flow could be drastically improved. I know when I started I was scared to death. I understood the port timings ut wasn't sure where the flow issues could be addressed. Then once I sat down and looked at a set of cylinders I could immediately see problem areas. 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.