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Have any of you guys with 5" exhaust ever used these?
http://www.imcomarine.com/cal_store/...-mufflers.html Sorry; not trying to change your topic. |
Originally Posted by drpete3
(Post 3652431)
So I have 4 of these but changing from SC engines to NA. I was told by one person I should use different mufflers on my NA motors. I really dont want to spend $2000 on new mufflers if these would be safe/fine for my new application.
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Run these on my 30' scarab. They do make a huge difference at idle yet no noticeable difference at WOT. I did a little test on one engine when I was running it on the stand. With my DB meter I got 108db at an idle with no mufflers and 84db with mufflers. These numbers were taken from the same location that the videos below we're shot from. See the tests below. These are dry pipes with a little bit of water allowed into the pipe
http://www.youtube.com/watch?v=Xy-7U...e_gdata_player http://www.youtube.com/watch?v=ZX0sV...e_gdata_player |
Originally Posted by Too Old
(Post 1663724)
Yes.....there's a rubber seal inside that will burn up without the introduction of water. CMI is currently testing a couple variations with other materials that would take the heat of dry exhaust. I look for a dry version in the not to distant future. :)
I have two pair of the elimination muffler for the 4" clamp on, and 5" outside diameter.. i donīt see any rubber..? Have you a picture of the seal? thanks |
Originally Posted by nova2_excalibur
(Post 4656291)
this is a old post.. But you say, there is a rubber seal inside? have that all Muffler from cmi?
I have two pair of the elimination muffler for the 4" clamp on, and 5" outside diameter.. i donīt see any rubber..? Have you a picture of the seal? thanks |
For what it's worth, mine didn't have any rubber in them.
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