New exhaust question.
02-14-2007 | 08:02 PM
#12
Registered
Joined: Jan 2002
Posts: 4,612
Likes: 7
From: ALTO, MI
If you plan on doing any other work to the engine I would seriously consider true header exhaust.
Be very carefull of aluminum exhaust.
If you overheat the engine due to lack of water flow the aluminum exhaust can melt down.
The headers ( steel ) will usually survive this.
Be very carefull of aluminum exhaust.
If you overheat the engine due to lack of water flow the aluminum exhaust can melt down.
The headers ( steel ) will usually survive this.
02-15-2007 | 04:58 PM
#14
Registered
Joined: Oct 2005
Posts: 1,899
Likes: 20
From: Millstadt, IL
I have EMI exhaust and I am very satisfied. Expect 1 or 2 MPH gain. This is the best place to start with the upgrades. You get rid of the wet riser joint and improve reliability. Any engine mods you do, especially the Cam would need them anyway. It is better if you ditch the silent choice, if you want to reduce the noise use mufflers to compensate.
Good luck!
Good luck!
02-15-2007 | 07:22 PM
#16
Ginger or Mary Ann?
Joined: Oct 2000
Posts: 11,030
Likes: 9
From: L
I replaced my heavy azz stock exhaust last yr with SM. Lost a good 80# between both motor change overs, but seen zero speed gains. Motors have a different sound now. More of a tingy sound now than the deep tone the cast steel gave it.
My previous boat had a blower motor with straight thur hull Merc/Gill exhaust. I got tired of the fulltime loudness real quick. Installed silent choice, had no speed loss.
My previous boat had a blower motor with straight thur hull Merc/Gill exhaust. I got tired of the fulltime loudness real quick. Installed silent choice, had no speed loss.
