Gibson Turn Down Tips
04-11-2009, 06:01 PM
#12
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Any of you guys have pictures of them installed on a vee with twins?
I just measured and there should not be an issue on the outside but they will be just a few inches above the tabs. My concern is in the center. I think if I angle them both toward the center I will be fine but they are going to be real close to the steering rams if not.
Thanks
I just measured and there should not be an issue on the outside but they will be just a few inches above the tabs. My concern is in the center. I think if I angle them both toward the center I will be fine but they are going to be real close to the steering rams if not.
Thanks
04-11-2009, 10:28 PM
#14
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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
Last edited by Boatally Insane; 04-11-2009 at 11:19 PM.
04-11-2009, 11:11 PM
#15
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Any of you guys have pictures of them installed on a vee with twins?
I just measured and there should not be an issue on the outside but they will be just a few inches above the tabs. My concern is in the center. I think if I angle them both toward the center I will be fine but they are going to be real close to the steering rams if not.
Thanks
I just measured and there should not be an issue on the outside but they will be just a few inches above the tabs. My concern is in the center. I think if I angle them both toward the center I will be fine but they are going to be real close to the steering rams if not.
Thanks
Last edited by Plum_Crazy; 04-11-2009 at 11:18 PM.
04-12-2009, 01:17 AM
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Quent,
Thanks very much for the reply. At idle and around the docks is all I am looking for. I thought they would have to blow a lot of bubbles in the water but it sounds worse than I thought it would be. My concern is for my wife or anyone else on the swim platform as we back into a dock. If it is too bad I actually have a possible solution in mind that would be easy to do on the aluminum platform to shield it.
If we don't police ourselves they will do is for us and it will cost a lot more than the turn down pipes! $$$$$$$$$$$$$$$
Doc
Thanks very much for the reply. At idle and around the docks is all I am looking for. I thought they would have to blow a lot of bubbles in the water but it sounds worse than I thought it would be. My concern is for my wife or anyone else on the swim platform as we back into a dock. If it is too bad I actually have a possible solution in mind that would be easy to do on the aluminum platform to shield it.
If we don't police ourselves they will do is for us and it will cost a lot more than the turn down pipes! $$$$$$$$$$$$$$$
Doc
04-12-2009, 06:49 AM
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04-12-2009, 08:13 AM
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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.
[YOUTUBE]http://www.youtube.com/watch?v=VgcX2gXEgNg&feature=channel_page[/YOUTUBE]
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.
[YOUTUBE]http://www.youtube.com/watch?v=VgcX2gXEgNg&feature=channel_page[/YOUTUBE]
