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Old 03-15-2011, 06:06 PM   #12
ebrabaek OP
Beastly Adventurer
 
Joined: Jan 2010
Location: El Paso,NM
Oddometer: 4,346
Sooooo.... finally got to measure my fellow 8GS riders bike that now has the old oval Leo Vince..... The findings were indeed interesting......The main difference was the tone...... The old oval had more mid range whereas the new LV one had more lower frq rumble......which was noticeable.... In a very nice way. The bike was positioned about the same....but since there have been a few days between the testing.... there could be a variation of about 1 db. Here we go......
Old oval Leo Vince with insert idle.......87db



Video of Leo Vince oval idle....
http://s180.photobucket.com/albums/x...t=MVI_1413.mp4


Oval at SAE 4000 rpm with insert.....98db


Video of Leo Vince oval SAE 4000 rpm......
http://s180.photobucket.com/albums/x...t=MVI_1415.mp4

Leo Vince oval open idle.......93db


Video of Oval open idle.......
http://s180.photobucket.com/albums/x...t=MVI_1408.mp4

Oval SAE 4000 rpm open....103...( when I snapped....it went to 102...and then back to 103 db).....


Video of Oval SAE 4000rpm open.....
http://s180.photobucket.com/albums/x...t=MVI_1410.mp4

As you can see..... at idle...or at low rpm.... The new can is actually a bit quieter..... even at 30mm shorter sleeve..... But here is the kicker.... The exit at the end cap makes up for some of that. Old oval collar to collar was 407mm....and new one is 375mm...... But from beginning of front collar to top of the end cap.....old oval was 470mm.....new one was 465mm.....making up most of the loss. Interesting. You can hear the difference in sound....and I contribute this to the new packing material they used in their new pipe. Old oval had the loose packing material sort of poked in it..... Like in this video.....
http://s180.photobucket.com/albums/x...t=MVI_0162.mp4
Whereas the now one has a wrap style material in it. My experience is that the old stule does better at attenuating the sound....but does not last as long as the wrapping type. They have same effect on performance.... Other than that....they offer the same affect on performance. As far as the mid pipe...... There does appear to be a little difference in the angles..... Took the old mid pipe of his bike, and held it next to my new one...... It is hard to see on a 28mm lens.... But it did appear to me that the newer header beside being a little shorter....is angled inward towards the bike a little more. That is a good thing for people with luggage box issues..... That confirms the need for a thinner spacer.....imho.



So in summery..... The new pipe is a little quieter at low rpm`s..... bu 2db`s..... But as gasses speed up....they bypass the silencer part more....and can length is now dominating..... Thus at above 4000 rpm`s....the older oval was a little quieter, by 1-2db`s. This all makes sense to me..... But I would really like to put both systems on a dyno...... I have a feeling that the new one yields just a little more power as compared to the old one. The sound from the new one is killer...... awesome. Now I am just waiting on a extra plastic end cap from Leo Vince......so I can make a ehhhhhh.... carbon fiber cap to fit the other wise beautiful pipe.


Erling
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