J R said:supertrapp LOL : This all dates from the early 1980's when Supertrapp invented a muffler designed for dirtbikes to trap potential sparks, or burning, carbonized, bits, so it could have US Forrestry Approval for off-road use. The "trapp" tells what the intended purpose was. If you wanted a Bike to barely work you had to stick a couple of pounds, or about 23-25 of these discs in the end of your exhaust. Of course this didn't really work, which is why they ended up putting a hole up the middle anyway. You don't tune an exhaust.
Your engine has 15 psi (1 Bar) of atmospheric pressure sitting at the inlet and another 15 psi lurking at the end of the tailpipe. The inlet stroke creates a pressure differential and the atmosphere goes rushing inward. The exhaust valve opens and there is a pressure rise in the tube followed by a strong vacuum signal as the gases head down the pipe. Note that it said "vacuum signal."
Do you guys just read magazines or what LOL
Lamont posted these as looks.he never made claim they where light or the best performance.and most of you guys wouldn't know a good two into one if it smacked ya in the head and if you feel you do please explain it to me i believe i can stay with ya anywhere ya wanna go in the discussion........JR
Don't tell me let me guess the sideburner is THE exhaust to have :clap2: :a20:
heres some links for ya http://home.earthlink.net/~mmc1919/venturi.html
And finally http://home.earthlink.net/~mmc1919/venturi_discuss_math.html
if you do let me know....friend of mine had a tlr and i really love that vtwin thumper sound....low deep and smooth .... /droolJ R said:I wish I could get my bike to sound like a TL with pipesÂ :bigthumbsup: thats would be cool