BurntLegs Posted October 27, 2017 Report Share Posted October 27, 2017 Hello, I have been doing some thinking and was wondering if anyone else has thought about this/seen any results themselves. My best guess would be longer tubes between carbs and filters may help lower end at the expense of top end. Possibly higher velocity/more laminar flow at low scoocums and slightly less flow at maximum scoocums? Or maybe the effect is minimal and the tubes simply choke the engine? What got me started was the CFM intake, to me its interesting and was surprised I didnt find too much conversation about the subject considering allot of people here drag and reed spacers are kinda popular. Quote Link to comment Share on other sites More sharing options...
ZillaFreak Posted October 27, 2017 Report Share Posted October 27, 2017 Issue with the CFM air box is that it hinders so much air flow into the filter. Reed spacers are not popular, they are only used when clearance is needed for the carb bowl and case. Other than that, no one likes to use them. If you want to test your thought, get a piece of metal pipe that is the same ID as the carb intake side and use some pods. Cut it long to start. Find a dyno. Make runs. Record data. Cut tube to shorter. Repeat dyno runs. Keep doing this. Plot all data with the different length tubes. See results. Quote Link to comment Share on other sites More sharing options...
specialblend07 Posted October 27, 2017 Report Share Posted October 27, 2017 I think Gary @ SRP has velocity tubes on his banshee? Or has something weird going on. Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted October 27, 2017 Report Share Posted October 27, 2017 There has definitely been a few grandiose attempts at tuned intake length and velocity stacks. Gary at SRP, Wayne "Wobbly" Wright on the TSS 500's, Plenty of GP guys playing with Aprillas and other two strokes, even Mull Engineering had a lengthened intake. Do they work? Sure if done right. Definitely a marginal result. In the end the reason you don't see much of it is because nobody worth a fuck is getting results that are worth a fuck. Quote Link to comment Share on other sites More sharing options...
BurntLegs Posted October 27, 2017 Author Report Share Posted October 27, 2017 Alright, guess I'm beating a dead horse. Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted October 27, 2017 Report Share Posted October 27, 2017 Kinda. If you look on the RzRD forums, there will be some cool info on it if you dig. Quote Link to comment Share on other sites More sharing options...
Schweet97Z Posted October 28, 2017 Report Share Posted October 28, 2017 Mull Engineering has stacks. Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
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