Exhaust tips advice-to flap or not to flap
06-06-2004, 09:20 PM
#1
Registered
Thread Starter
Join Date: May 2003
Location: In the Mountains
Posts: 11,772
Likes: 0
Received 0 Likes
on
0 Posts
Exhaust tips advice-to flap or not to flap
I'm hoping next weekend to start the manifold/riser replacement on my 311 Formula. (thanks to Too Old). At the same time I am ditching the "bolt on" silent thunder swim platform exhaust box. I am going to go with new thru hull exhaust tips as the stock ones are way to short for my taste. Question is do I want to go with tips with the "internal" flappers. I don't like the looks of the traditional "Salsbury Flappers" but I've heard the internal ones burn out frequently. Who has what and with what success? Feedback please.
Thanks.......
Thanks.......
06-06-2004, 09:31 PM
#2
Registered
Join Date: Nov 2000
Location: Grand Haven, MI USA
Posts: 3,124
Likes: 0
Received 0 Likes
on
0 Posts
Re: Exhaust tips advice-to flap or not to flap
Yes on the flappers, internal may burn up but may not. The external will keep water out when backing up. They help keep noise down also. I would say external at the least. I have both but the ext are stainless (shotgun) exhaust.
06-07-2004, 06:42 AM
#4
Registered
Join Date: Oct 2001
Location: Tampa,Fl.
Posts: 1,124
Likes: 0
Received 0 Likes
on
0 Posts
Re: Exhaust tips advice-to flap or not to flap
I like the cleaner look of the internal (stainless steel). I had slashcut on the Donzi with SS internal flapper and it never gave me trouble. As for the sound of metal noise, no way if your exhaust is throaty. The flapper really never gets a chance to close while the motor is running.
06-07-2004, 07:24 AM
#5
Registered
Join Date: Mar 2002
Location: Brandon, MS.
Posts: 1,135
Likes: 0
Received 0 Likes
on
0 Posts
Re: Exhaust tips advice-to flap or not to flap
I had the quick and quiets on mine w/ external flapper.....swapped them out for Rex Marine 90degree angle cuts w/ internal flappers. You can hear the internals a bit at idle but it's not really that bad. I like the sound much better with these.
06-07-2004, 08:06 AM
#6
Registered
Join Date: Nov 2003
Location: Melbourne, FL
Posts: 1,243
Likes: 0
Received 0 Likes
on
0 Posts
Re: Exhaust tips advice-to flap or not to flap
I'd go with BOTH---but then I've been burned by water ingestion--cost me two engines.
The real problem was mechanic didn't put the 3" riser extensions in exhaust and there wasn't sufficient fall in exhaust line. From my experience make SURE you watch that issue.
Poorsche
The real problem was mechanic didn't put the 3" riser extensions in exhaust and there wasn't sufficient fall in exhaust line. From my experience make SURE you watch that issue.
Poorsche
06-07-2004, 08:20 AM
#7
Registered
Thread Starter
Join Date: May 2003
Location: In the Mountains
Posts: 11,772
Likes: 0
Received 0 Likes
on
0 Posts
Re: Exhaust tips advice-to flap or not to flap
Originally Posted by Troutly
I'd go with external rubbers 
06-07-2004, 10:25 AM
#8
Registered
Join Date: Jan 2003
Location: San Dimas, California
Posts: 185
Likes: 0
Received 0 Likes
on
0 Posts
Re: Exhaust tips advice-to flap or not to flap
Our older no burn flaps are a little noisy at idle particularly with large cams. The new Superflappers however are very quiet and offer much more longevity as well. We have yet to lose a set even on blown motors.
06-07-2004, 02:13 PM
#10
Registered
Join Date: Jan 2002
Location: Toledo, O-hi-O
Posts: 523
Likes: 0
Received 0 Likes
on
0 Posts
Re: Exhaust tips advice-to flap or not to flap
Speeking of Flap's, I have Gill 4" thru-hulls with the internal flap.
One is shot and the other one aint pretty. Some one has to make replacements,
any one know who to call?
Thanks,
Uncle Ernie
One is shot and the other one aint pretty. Some one has to make replacements,
any one know who to call?
Thanks,
Uncle Ernie
