Larry's Shee Posted May 15, 2009 Report Share Posted May 15, 2009 According to Jenning's two stroke tuners handbook, pipe dimensions are primarily determined by port timing and desired rpm of power peak. This being said, why don't pipe manufacturers publish optimum port timing for their pipe, along with the rpm spec? That way a builder would have a mark to shoot for. Also, maybe someone knowledgeable could make a list of all pipes in and out of production with type of powerband and possibly porting to go with it. Then pin it so a person could read that rather than searching and having to read a dozen comments. I know that a "Great" pipe with the wrong combination of timing , carbs, etc will run like poo, then that person would say its a rotten pipe. Quote Link to comment Share on other sites More sharing options...
GrMeyer Posted May 15, 2009 Report Share Posted May 15, 2009 According to Jenning's two stroke tuners handbook, pipe dimensions are primarily determined by port timing and desired rpm of power peak. This being said, why don't pipe manufacturers publish optimum port timing for their pipe, along with the rpm spec? That way a builder would have a mark to shoot for. Also, maybe someone knowledgeable could make a list of all pipes in and out of production with type of powerband and possibly porting to go with it. Then pin it so a person could read that rather than searching and having to read a dozen comments. I know that a "Great" pipe with the wrong combination of timing , carbs, etc will run like poo, then that person would say its a rotten pipe. +1 :thumbsup: Quote Link to comment Share on other sites More sharing options...
mopar1rules Posted May 15, 2009 Report Share Posted May 15, 2009 According to Jenning's two stroke tuners handbook, pipe dimensions are primarily determined by port timing and desired rpm of power peak. This being said, why don't pipe manufacturers publish optimum port timing for their pipe, along with the rpm spec? That way a builder would have a mark to shoot for. Also, maybe someone knowledgeable could make a list of all pipes in and out of production with type of powerband and possibly porting to go with it. Then pin it so a person could read that rather than searching and having to read a dozen comments. I know that a "Great" pipe with the wrong combination of timing , carbs, etc will run like poo, then that person would say its a rotten pipe. X2 :thumbsup: maybe pipe manufacturers don't post such info, cause of competition taking/stealing those specs/info? Quote Link to comment Share on other sites More sharing options...
DallasGDub Posted May 15, 2009 Report Share Posted May 15, 2009 I agree. Would make it easy for the consumer as well. "If I want this pipe, I need these mods" However, people that do have that knowledge, are normally builders. That knowledge is what brings business. That is like asking someone to post a secret chili recipe. :biggrin: Quote Link to comment Share on other sites More sharing options...
desertdeweller Posted May 15, 2009 Report Share Posted May 15, 2009 a lot won`t even post dyno results for a bike. I hate it when they say yea it produces so much torque or hp. but don`t give the graph or if its stock or modded etc. Quote Link to comment Share on other sites More sharing options...
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