Chris Craft Stingers Forums
General Category => Chris Craft Stingers => Topic started by: czmpjx on November 16, 2013, 09:19:44 am
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Good afternoon all;
I am the current owner of a 312 stinger, this is a STOCK boat w/twin 454 (330 hp) motors & alpha drives. I have ben a boater for over 30 years.
The info I am looking for is: Adding thru hull exaust to this boat. I am looking at a sielent choice style exaust.
I can aquire the" Kits" (tips, diverters, hardware, ect..) But the problem I see is I need to make the exaust exit ABOVE the rub rail. If I use the "Kitts as supplied the exaust exits below the rub rail and thru the hull & swim platform.
Question: Is there a riser or adpter to rase the exaust exit to above the rub rail ? I know this sounds like a stupid question ...But I want to do it corectly. (years ago I put thru hulls on a boat low near the waterline...I dont want to do this like that agan....too many issues!)
ANY HELP ????
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To answer you questions:
First the silent choice exhaust can be of many manufacturers. I have "Shotgun" exhaust on my boat and it opens up around 1200-1300rpm. there are lots of other types that are vacuum operated or solenoid operated. Check out the used parts section you might get lucky
As for the exit of the exhaust, I recommend that you keep it below the swim platform. I have mine below on my 390 and it is still quite loud! On my 260 the exhaust was above the swim platform and intrusive. It looked and sounded cool but I like the pipes below the platform for aesthetics and for sound. These were unrestricted tubes for small blocks and quite loud!
On the 390 I have big blocks and the exhaust has vacuum operated flaps on the outside tips. You could do this as you only need a set of stock Mercury manifolds, as that is what I have on my boat, and the pipes are held in by short sections of rubber connecting hoses that go to the stainless tips.
My 260 with exposed tips:
(http://i113.photobucket.com/albums/n202/ve3lt/260c.jpg)
My 390X with tips exiting just UNDER the swim platform
(http://i113.photobucket.com/albums/n202/ve3lt/mv7k.jpg)
Notice how clean it looks with the tips underneath and they don't stab you in the back when your sitting on the platform
(http://i113.photobucket.com/albums/n202/ve3lt/mv1-1.jpg)
This one you can barely see the exhaust tips (sorry I don't have a closup picture of the tips) but they are just above the water line and under the platform.
(http://i113.photobucket.com/albums/n202/ve3lt/mv6c1_zps0437586b.jpg)