super trapp exhaust
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Cruiser
Joined: May 2006
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super trapp exhaust
just installed new 2-1 supermeg with closed end cap & 20 discs sounds good maybe a little quiet but its raining here so cant take it for a run . could anyone tell me what it would sound like with open cap & 12 discs. i had a thunder header on before but on the highway after a 100 miles i had a headache. how does it compare to the thunderheader with an open cap? thanks BUTCH FIRST POST GREATINGS TO ALL
Intermediate
Joined: Dec 2006
Posts: 30
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From: San Diego, CA
RE: super trapp exhaust
bxbutch,
did you ever adjust the discs? If so, to what?
My info is that you start with a rich mix by using 12-14 discs and read the color for further refinement, usually adding to about 14-15. The Open end cap counts as 10 discs according to Supertrapp cusotmer service. The open end cap is necessary for dyno tuning. Heard anything different?
did you ever adjust the discs? If so, to what?
My info is that you start with a rich mix by using 12-14 discs and read the color for further refinement, usually adding to about 14-15. The Open end cap counts as 10 discs according to Supertrapp cusotmer service. The open end cap is necessary for dyno tuning. Heard anything different?
Elite HDF Member
Joined: Mar 2006
Posts: 4,722
Likes: 5
From: Biddeford, Maine
RE: super trapp exhaust
17 discs/closed is a good place to start, that is equal to 99% flow
9 discs/open is equal to 99% flow also.
Open endcap is equal to 8 discs, but also acts differently. Your bottom end will normally suffer a bit by using it as there is less back-pressure.
I didn't like the sound of the open endcap, just too raspy and loud for me. I'm running 17/closed right now and it's running great.
All my info comes from the former Supertrapp R&D guy that developed the current Supertrapp years ago.
9 discs/open is equal to 99% flow also.
Open endcap is equal to 8 discs, but also acts differently. Your bottom end will normally suffer a bit by using it as there is less back-pressure.
I didn't like the sound of the open endcap, just too raspy and loud for me. I'm running 17/closed right now and it's running great.
All my info comes from the former Supertrapp R&D guy that developed the current Supertrapp years ago.
Intermediate
Joined: Dec 2006
Posts: 30
Likes: 0
From: San Diego, CA
RE: super trapp exhaust
thanks maineultra.
Was concerned about the dynoing w/the SERT. Not sure if the tech will play the extra disc variable. Your response and the Supertrapp rep seem to put me in the neighborhood ( 10 discs plus end cap?). Only got the open end cap 'cuz the dyno folks said they needed the opening. Like you, will probably add 7-8 discs and close it up.
Was concerned about the dynoing w/the SERT. Not sure if the tech will play the extra disc variable. Your response and the Supertrapp rep seem to put me in the neighborhood ( 10 discs plus end cap?). Only got the open end cap 'cuz the dyno folks said they needed the opening. Like you, will probably add 7-8 discs and close it up.
Ultimate HDF Member
Joined: Nov 2005
Posts: 5,926
Likes: 138
From: NE Ohio
RE: super trapp exhaust
ORIGINAL: mikestreet
thanks maineultra.
Was concerned about the dynoing w/the SERT. Not sure if the tech will play the extra disc variable. Your response and the Supertrapp rep seem to put me in the neighborhood ( 10 discs plus end cap?). Only got the open end cap 'cuz the dyno folks said they needed the opening. Like you, will probably add 7-8 discs and close it up.
thanks maineultra.
Was concerned about the dynoing w/the SERT. Not sure if the tech will play the extra disc variable. Your response and the Supertrapp rep seem to put me in the neighborhood ( 10 discs plus end cap?). Only got the open end cap 'cuz the dyno folks said they needed the opening. Like you, will probably add 7-8 discs and close it up.
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