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All twins w/crossover use it to flow more exhaust, one pipe into two. As the motor runs, when it fires, it exits in 2 pipes, same for the other cyl.
I understand the model-pos and neg pressure waves, scavenging and such. If I had the equipment, I would test myself.So Guzzi uses them to increase midrange but at the expense of low or high end? The 3k dip in power is present in all 3 of mine if you look at the charts. I'll look around for an animated power pulse/flow video.The Norton tuning is from the old Haynes repair manual ('70's) with the performance section as the last chapter. Kind of rare as the other copy I have omits the section. I've only seen one and I have it.
Has anyone compared the power curves and such for a big block running straight headers vs the same bike with the balance pipe up front? I ask because my Norton tuning guide states the balance pipe's sole purpose is noise reduction and should be scrapped in favor of straight headers into a low restriction muffler. The two engines share rpm ranges. And my Sport 1100 does not have one. Curious in Columbia.
A twin is two singles on a common crankshaft. Getting both to behave as one is an art.
The original owner of my 04 Stone Touring put a Stucchi crossover and Mistral "silencers" on it, plus a PC-III with a map by Todd Egan and a Ferracci airbox. I hate loud bikes and removed all but the PC-iii. Found no difference in performance. Later, as an experiment, I put that Stucchi crossover on my totally standard 03 Stone Touring. Could not tell any difference. Removed it and again, no difference. The one proven advantage with the Stucchi crossover is that gearbox oil changes are a lot easier. Both bikes deliver a consistent 44-45mpg.Ralph
The front crossover on my Hydro caught my alternator cover when the bolts vibrated off. So, they are at least good for that.
:D :D :D :D Yeah , I have a Haynes manual for BMW printed in '75 with a performance tuning section in the back . Some of it is simply incorrect ;D Dusty