factory pro velocity stacks/Dynoed..

[Gnarbunkle]

Glenn, apparently Suzuki have not done a good job! from memory there is supposed to be inteference where the rubber horns join the alloy throttle bodies or somewhere nearby. Anyway it does not help their flowing properties and this is where aftermarkets should help. Inlet tracts need to be smooth with no steps ie no instant diameter changes eg where parts join. As 01 mentioned shorter stacks work at higher rpm so replacing the longs with shorts should sacrifice a little midrange and gain a little top end, in theory. How much is a little, I don't know, it might just be a less steep drop off from peak power rpm. Without individual cylinder pair remapping, I wouldn't be suprised if less or no peak power was observed as I'm sure the fuelling requirements will change and the mapping will be off on the changed cylinders concerned. <i></i>