Gibson Turn Down Tips
04-12-2009 | 02:54 PM
#22
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Posts: 3,074
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From: Fort Worth, TX
http://store.airflo.com/exhaust-elbows.html
Can someone tell me why these would not work? I am just not spending $500 + for a 4" single wall pipe with 1 bend. I do not plan to use them often.
Can someone tell me why these would not work? I am just not spending $500 + for a 4" single wall pipe with 1 bend. I do not plan to use them often.
04-12-2009 | 03:06 PM
#23
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From: Beautiful North Carolina
04-12-2009 | 03:13 PM
#24
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Charter Member #34
Joined: Oct 2000
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From: Beautiful North Carolina
I had GGB make me a set a couple years ago as their mufflers were too loud. I was 94 db at idle 
and certainly would not pass the Wisconsin idle db limit (86 db 
)
I NEVER had ANY reversion issues and they sounded GREAT on plane as well as cut some of the interior resonance....
The only thing I didn't like was the lack of "dock presence"... sounded little better than a Sea Ray at idle, (82 db at idle) but I suppose I could've cut them a bit shorter to get more sound out of them......
Doug
and certainly would not pass the Wisconsin idle db limit (86 db ) I NEVER had ANY reversion issues and they sounded GREAT on plane as well as cut some of the interior resonance....
The only thing I didn't like was the lack of "dock presence"... sounded little better than a Sea Ray at idle, (82 db at idle) but I suppose I could've cut them a bit shorter to get more sound out of them......
Doug
Doug,
That is a very nice setup. Thnks for the picture and the information.
Mark
04-12-2009 | 03:18 PM
#25
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Charter Member #34
Joined: Oct 2000
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From: Beautiful North Carolina
I was determined to meet Minnesota's ultra strict 84dB limit at idle because just getting stopped by the fish police ruins my day on the water. I also wanted to keep from bubbling directly under the swim platform and keep soot off the transom, so I went with more of an angled design. GGB built these turn-downs to my spec. They're bolted onto HPI mufflers and have DMP internal flappers. The biggest hurdle was clearing the center turn-downs with the tie-bar in the trailer position. Imco fabbed custom saddle mounts to get the tie-bar farther back. I have not had this setup on the water, yet. But, here's how it all turned out.
I sure wish I had known GGB was doing that when I bought mine a few years back. They are out of business now right?
The IMCO brackets are perfect. They look nice and solve the same problem I am faced with. I'll have to check into those.
Thanks
04-12-2009 | 03:21 PM
#26
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Joined: Oct 2000
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From: Beautiful North Carolina
I had them on my 42' Cigarette and they made a ton of difference it did keep the swim platform area wet when at the dock but How long do you stay there idling anyway.
It made the boat legal also with law enforcement here compared to being WAY over the limit before.
Mine were not Gibson they were custom made by CMI since Gibson did not offer 5" turn downs.
Here is a vid from a run where you see the boat starting as well as a bunch of pictures. I have sold the boat to Japan but still have the turndowns, they will likely go on to the MTI if we can make them fit.
It made the boat legal also with law enforcement here compared to being WAY over the limit before.
Mine were not Gibson they were custom made by CMI since Gibson did not offer 5" turn downs.
Here is a vid from a run where you see the boat starting as well as a bunch of pictures. I have sold the boat to Japan but still have the turndowns, they will likely go on to the MTI if we can make them fit.
Thanks for taking time to post the pictures. I remember the CIG now that I see it again. I always admired it every time pictures were posted.
Good luck with the MTI that's an awesome ride.
Mark
04-12-2009 | 04:40 PM
#27
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From: Port Charlotte, FL
04-12-2009 | 05:36 PM
#28
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From: IL
http://store.airflo.com/exhaust-elbows.html
Can someone tell me why these would not work? I am just not spending $500 + for a 4" single wall pipe with 1 bend. I do not plan to use them often.
Can someone tell me why these would not work? I am just not spending $500 + for a 4" single wall pipe with 1 bend. I do not plan to use them often.
04-12-2009 | 09:33 PM
#29
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From: Port Charlotte, FL
http://store.airflo.com/exhaust-elbows.html
Can someone tell me why these would not work? I am just not spending $500 + for a 4" single wall pipe with 1 bend. I do not plan to use them often.
Can someone tell me why these would not work? I am just not spending $500 + for a 4" single wall pipe with 1 bend. I do not plan to use them often.
You can go with rubber hoses for temporary use.
04-13-2009 | 12:24 PM
#30
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Joined: Jun 2006
Posts: 405
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From: Royal Oak, MI
http://store.airflo.com/exhaust-elbows.html
Can someone tell me why these would not work? I am just not spending $500 + for a 4" single wall pipe with 1 bend. I do not plan to use them often.
Can someone tell me why these would not work? I am just not spending $500 + for a 4" single wall pipe with 1 bend. I do not plan to use them often.
I do not have any problems with water splashing on the swim platform, as mine is solid. The only downside is that for 80% of the time I'd LIKE them to be louder. My boat is very sedate looking but has a VERY mean sound at idle. Really grabs peoples attention, and usually in a good way, but for the odd time it piss's someone off, it's not worth it.
