More Thunder Less Silent
08-09-2006, 08:26 AM
#11
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Re: More Thunder Less Silent
Actually "rambunctious " here
before you cut big hoes in your show surface of yoru swim platform , I have two other options
1)
remove or cut out the baffle plates that are about 5" from teh square tips. I did this with a very long saw zall blade, through the square tip openings. start at teh bottom ( 1" gap exists, cut up, over, and down, like a dog house hole.
this makes it louder, but still muffled
before you cut big hoes in your show surface of yoru swim platform , I have two other options
1)
remove or cut out the baffle plates that are about 5" from teh square tips. I did this with a very long saw zall blade, through the square tip openings. start at teh bottom ( 1" gap exists, cut up, over, and down, like a dog house hole.
this makes it louder, but still muffled
So, what is behind the "baffle"? When I open the flapper, is the "baffle" the "wall" of fiberglass you see there? I appears that the exhaust has to be directed UNDER that so-called "baffle". What you are proposing is to straighten out the exhaust flow from having to go under the "baffle" to straight thru the "baffle" and maybe a little exhaust may still find its way under the "baffle" as that part will not be cut out.
Could you use a holesaw to just cut out a decent size circle?
And in the end, this process doesn't really help performance, only makes the boat sound better, right?
08-09-2006, 08:49 AM
#12
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Re: More Thunder Less Silent
Here are the pics of the mod that I did to the underside of the swim platform. These holes are not visiblewhen in the water and running. Only visible when on a lift from underneath or on a rack.
Results are not only louder exhaust, but any relief of backpressure for the exhaust is always a good thing.
Results are not only louder exhaust, but any relief of backpressure for the exhaust is always a good thing.
08-09-2006, 10:10 PM
#13
Gone Fishin'
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Re: More Thunder Less Silent
So, what is behind the "baffle"? When I open the flapper, is the "baffle" the "wall" of fiberglass you see there? I appears that the exhaust has to be directed UNDER that so-called "baffle". What you are proposing is to straighten out the exhaust flow from having to go under the "baffle" to straight thru the "baffle" and maybe a little exhaust may still find its way under the "baffle" as that part will not be cut out.
I had tried that first, had a dull hole saw. birned my finger touching it. then went to a long blade and the project was done in 30 seconds.
the baffle is this fiberglass wall. the silent thunder patnet is the exhaust bubbling under this wall.
cut the wall out and it will sound better.
no perf improvement
Ramb
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08-10-2006, 11:43 AM
#15
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Re: More Thunder Less Silent
Originally Posted by Treads
Here are the pics of the mod that I did to the underside of the swim platform. These holes are not visiblewhen in the water and running. Only visible when on a lift from underneath or on a rack.
Results are not only louder exhaust, but any relief of backpressure for the exhaust is always a good thing.
Results are not only louder exhaust, but any relief of backpressure for the exhaust is always a good thing.
If the boat is stationery and is being subjected to back swell is there any chance that water could be ingested into the motors now there is more chance of water entering the platform because of the holes?
08-10-2006, 12:05 PM
#16
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Re: More Thunder Less Silent
If the boat is stationery and is being subjected to back swell is there any chance that water could be ingested into the motors now there is more chance of water entering the platform because of the holes?
08-10-2006, 08:42 PM
#17
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Re: More Thunder Less Silent
in my opinion, it isn't any more chance than a classic flat transom boat with short thru hull tips and no swim platform.
the formula thru hulls do have butterflys at the transom , but mine, like many others have mentioned, are burned out.
there is a decent slope to the exhaust, especially at waterline angle of these boats when floating.
ramb
the formula thru hulls do have butterflys at the transom , but mine, like many others have mentioned, are burned out.
there is a decent slope to the exhaust, especially at waterline angle of these boats when floating.
ramb
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08-12-2006, 10:25 AM
#20
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Re: More Thunder Less Silent
Originally Posted by formula1
I don't think the holes in the bottom would pose much of a problem, but cutting out the baffles seem like they could!
With that being said i do take it easy when coming off plane.
