One more advantage to the dry pipes is that everyone hears you coming and they get out of your way...I've had a lot less lake lice cut in front of me.
Thread: Differences in Marine Exhaust?
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02-25-2009 11:04 PM
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- Join Date
- Oct 2008
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- newcastle, ca.
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02-25-2009 11:31 PMYeh Greg, post some pics and yes your boat is very load. I can state that now that I am a law abiding quiet boater. Doug
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- Oct 2008
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02-25-2009 11:38 PMThere is no difference in power between equivalent wet and dry systems. If you pick up power, it's because you got better exhaust, not because water is no longer mixing. Dry pipes are dry purely to combat water from being drawn back into the engine due to big cam overlap- reversion.
Eickerts will make the same power as CMI's, but they don't look as cool. Manifolds will corrode and headers will vibration crack. But I've seen way more cracked headers than rotten manifolds, especially if you maintain your boat properly and fresh-water flush. And tube headers cost more.
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02-26-2009 02:47 AM
I like the way my CMI's are set up. They are dry through the transom with a switchable muffler on the end. The water mixes in the muffler. With the mufflers open, they sound like dry exhaust. When they are closed, they sound like your average wet exhaust with switchable mufflers. I would not like it without the mufflers.
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02-26-2009 11:36 AM
Dry pipes are just plain rude and will cause all the problems listed above. A 420 HP engine does not need them at all. A nice set of CMI headers will gain some power. I have rather large power with wet exhaust and downturns to keep the exhaust underwater at idle. I am well below the legal limit at idle. If we as boaters continue to thumb our nose at the noise issues our fun will end with enforcement. Every state has noise laws some are not enforced very well...yet. Boat nice.
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03-01-2009 07:39 PM
I want good sound, I do NOT want to be kicked off the lake! lol..
How MUCH louder will a set of manifolds (wet) be as compared to the stock exhaust? I have the corsa quick/quiet system which will be pulled off..
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03-02-2009 02:02 AM
They aren't any louder if you are rafted up at Dripping Springs!
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03-02-2009 07:25 AM
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- Join Date
- Feb 2009
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- E Dock & Bartlesville OK
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- 51
03-02-2009 09:49 PMYes we do. From 9:00 PM to 9:00 AM anywhere on the lake and anytime within 50 feet of a public or private dock. The sound level is 90 decibels per the SAE J2005 standard. See Subchapter 7 of the rules (300:35-7-6) on the GRDA website. We are just lucky they do not enforce it. There is also the water muffling rule (300:35-7-5). This is why I put the mufflers back on my boat since I run it mostly at night.
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03-02-2009 11:53 PM
I was always under the impression that headers would lead to better power gains over stock than the high performance manifolds. It seems some people don't necessarily think so...... So which is it? Do high perf. manifolds like the S/M perform as well as something like CMI headers? I've been considering an upgrade on my 502 currently running just under 500 hp.
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- Join Date
- Nov 2008
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- 231
03-03-2009 10:38 AMStainless Marine exhaust = Clint Eastwood. Everybody's headers = Curt Kobain
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03-03-2009 01:12 PM
Dry exhaust... (with a little water at the tip to keep the flapper happy).
http://www.youtube.com/watch?v=SSzU4...e=channel_page
We pulled into Shoreline Village with the boat and someone asked us how fast it was from the dock. We told them 112mph but we probably had a couple more miles an hour with a prop change... guy gave us a big grin and a thumbs up. Gotta love a 75mph boat that sounds like she runs a hundred!
It has Gibsons on it now and it's pretty tolerable.
"Tear gas and draft beer don't mix."
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- Join Date
- Feb 2009
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- E Dock & Bartlesville OK
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- 51
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03-05-2009 08:45 PM
What about Dana? Some seem to swear by them.
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- Join Date
- Nov 2008
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- Port Tobacco, MD
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- 26