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-   -   Gibson Turn Down Tips (https://www.offshoreonly.com/forums/general-q/206661-gibson-turn-down-tips.html)

Dock Holiday 04-11-2009 02:28 PM


Originally Posted by hoozeyurdaddy (Post 2841626)
I have the long one's, and they do splash a lot of water, but sitting at the dock is much better, they help a little at cruise also, but the main thing is the fish cops don't all turm and look as soon as I start up.
larry

FISH COPS

Never heard that before but I like that!

blackboat 04-11-2009 04:47 PM

Is water reversion any problem turning these pipe ends down in to the water?

Dock Holiday 04-11-2009 06:01 PM

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

Dock Holiday 04-11-2009 06:02 PM


Originally Posted by blackboat (Post 2841701)
Is water reversion any problem turning these pipe ends down in to the water?

I have always thought there would be less of an issue with these.

Boatally Insane 04-11-2009 10:28 PM

I had GGB make me a set a couple years ago as their mufflers were too loud. I was 94 db at idle :eek: 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......

http://i130.photobucket.com/albums/p...e/P1020877.jpg


Doug

Plum_Crazy 04-11-2009 11:11 PM


Originally Posted by Dock Holiday (Post 2841736)
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 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.

http://img.photobucket.com/albums/v2...onic/tail1.jpg

http://img.photobucket.com/albums/v2...onic/tail2.jpg

http://img.photobucket.com/albums/v2...onic/tbar2.jpg

http://img.photobucket.com/albums/v2...onic/tail3.jpg

KachinaShadow 04-12-2009 01:17 AM


Originally Posted by Dock Holiday (Post 2841642)
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

Not a real good idea to have ANYONE on the swim platform if you're backing up:eek:

bobbowobbo 04-12-2009 06:49 AM


Originally Posted by Dock Holiday (Post 2841643)
FISH COPS

Never heard that before but I like that!

yep that was a lake powell term and I lived in glenwood springs.. does that ring a bell

GLH 04-12-2009 08:13 AM

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]

http://www.offshoreonly.com/forums/a...-dsc00653a.jpg

http://www.offshoreonly.com/forums/a...-dsc00654a.jpg

http://www.offshoreonly.com/forums/a...-dsc00656a.jpg

http://www.offshoreonly.com/forums/a...-dsc00655a.jpg

GLH 04-12-2009 08:15 AM

See them running on plane here.


http://www.limestonedev.com/tiger/000Cig1.jpg


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