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PVC y pipe gt40 muffler delete

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Category: General Correct Craft Discussion
Forum Name: General Discussion
Forum Discription: Anything Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=37092
Printed Date: May-20-2024 at 1:56am


Topic: PVC y pipe gt40 muffler delete
Posted By: NAUTIQUEjunky
Subject: PVC y pipe gt40 muffler delete
Date Posted: August-17-2015 at 6:53pm
Well thought I would share this, anyone running the hull hugger muffler here is a option for you to get more sound if you like. The Only thing I've seen on the Internet was the custom aluminum built y pipes and the High dollar Centek y pipe$$$.. This was made using schedule 40 pvc parts from Lowe's and my buddy giving me some pipe as well.. It's deff louder at idle which was what I was after and probably 20% louder at cruising speed 21mph.. Comments welcome.. If u had to buy the parts from Lowe's I'm guessing it would b less than $50 http://s1114.photobucket.com/user/862001/media/Mobile%20Uploads/20150814_205538.jpg.html" rel="nofollow"> [/IMG]        http://s1114.photobucket.com/user/862001/media/Mobile%20Uploads/20150814_214059.jpg.html" rel="nofollow"> [/IMG]

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1977 MasterCraft Stars&Stripes
1994 Ski Nautique
2000 Super Air Nautique
1986 Ski Nautique 2001
1999 Sport Nautique gt40 current











Replies:
Posted By: Gary S
Date Posted: August-17-2015 at 7:05pm
While I admire the effort I'm concerned about using plumbing pipe and the heat generated. If it was a good idea think of the money a boat builder could save when building multiple boats. It is the only thing between you and the bottom. If something happened I think an insurance company or a lawyer would be rubbing their hands with glee if that was found IMHO.

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http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS
95 Nautique Super Sport


Posted By: Hollywood
Date Posted: August-17-2015 at 7:07pm
Scary.

Straight pipe with no couplers or elbows is dangerous enough...


Posted By: NAUTIQUEjunky
Date Posted: August-17-2015 at 7:15pm
Gary.. time will test it.. with out motors having wet exhaust and temps around 160 range plus the heat from the risers also.. We ride 5min from the ramp so if one the joints do spring a bad leak from heat as you say.. I don't have far to get towed lol..

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1977 MasterCraft Stars&Stripes
1994 Ski Nautique
2000 Super Air Nautique
1986 Ski Nautique 2001
1999 Sport Nautique gt40 current










Posted By: NAUTIQUEjunky
Date Posted: August-17-2015 at 7:18pm
Originally posted by Hollywood Hollywood wrote:

Scary.

Straight pipe with no couplers or elbows is dangerous enough...


Kevin.. your not a fan of straight pipe exhaust on Correct Craft. Come on now..what a awesome sound.. music to my ears

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1977 MasterCraft Stars&Stripes
1994 Ski Nautique
2000 Super Air Nautique
1986 Ski Nautique 2001
1999 Sport Nautique gt40 current










Posted By: Orlando76
Date Posted: August-17-2015 at 7:30pm
I believe PVC has a heat rating of 140. The other day I wrapping up a warm engine temperature hunt and I was curious as to what my exhaust temp was. With the engine at 160 my exhaust was only 104. My bath water is warmer than that. I doubt the pvc melting is an issue.

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Please support The Cystic Fibrosis Foundation
1976 Ski Nautique 351 Escort
1993 Ski Nautique purple and black 351 HO PCM


Posted By: 8122pbrainard
Date Posted: August-17-2015 at 7:36pm
Originally posted by Gary S Gary S wrote:

While I admire the effort I'm concerned about using plumbing pipe and the heat generated. If it was a good idea think of the money a boat builder could save when building multiple boats. It is the only thing between you and the bottom. If something happened I think an insurance company or a lawyer would be rubbing their hands with glee if that was found IMHO.

I totally agree with Gary. With the exhaust being below the water line, the use of the PVC is very risky. Make sure you keep close to shore and you have plenty of bilge pump!

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54 Atom

/diaries/details.asp?ID=2179" rel="nofollow - 77 Tique

64 X55 Dunphy

Keep it original, Pete
<


Posted By: 8122pbrainard
Date Posted: August-17-2015 at 7:40pm
Originally posted by Orlando76 Orlando76 wrote:

I believe PVC has a heat rating of 140. The other day I wrapping up a warm engine temperature hunt and I was curious as to what my exhaust temp was. With the engine at 160 my exhaust was only 104. My bath water is warmer than that. I doubt the pvc melting is an issue.

Todd,
You're measuring the water temp. What's the exhaust temp? Yes, the overall temp is a blend of the two but there are hot spots. If anything happens with the RWP, there may be a meltdown if not caught right away. At least the PVC would cool down when the hull floods!

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/diaries/details.asp?ID=1622" rel="nofollow -

54 Atom

/diaries/details.asp?ID=2179" rel="nofollow - 77 Tique

64 X55 Dunphy

Keep it original, Pete
<


Posted By: TRBenj
Date Posted: August-17-2015 at 7:51pm
Agreed that the exhaust water is not that hot under normal conditions... It's the unexpected overheat that'll cause problems fast. I've seen exhaust hoses melt and they're good for 200+. Not a great place to try and save a buck, but that's just my opinion.


Posted By: baitkiller
Date Posted: August-17-2015 at 7:54pm
Well I hope you used CPVC cement at least???? I think what the guys above me think.

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Jesus was a bare-footer.............


Posted By: peter1234
Date Posted: August-17-2015 at 8:14pm
cpvc cement is for cpvc.. please dont give bad advice. solid core pvc is generally rated for 180 deg but i would never use is (lowes home depot sells foam core) foam core is not for exhaust either i guess you could try sch 80 but it is only really used for 95 + venting exhaust on newer high eff heating /Hw systems .. i completely agree with above posts   dont trust the pipe dont trust the joints and def dont trust the glue..

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former skylark owner now a formula but I cant let this place go


Posted By: Orlando76
Date Posted: August-17-2015 at 8:20pm
Originally posted by 8122pbrainard 8122pbrainard wrote:

Originally posted by Orlando76 Orlando76 wrote:

I believe PVC has a heat rating of 140. The other day I wrapping up a warm engine temperature hunt and I was curious as to what my exhaust temp was. With the engine at 160 my exhaust was only 104. My bath water is warmer than that. I doubt the pvc melting is an issue.

Todd,
You're measuring the water temp. What's the exhaust temp? Yes, the overall temp is a blend of the two but there are hot spots. If anything happens with the RWP, there may be a meltdown if not caught right away. At least the PVC would cool down when the hull floods!


I actually shot up inside the pipe for a temp, don't recall that actually number but it was close. My experience overheats seem to happen quick and sometimes too late. Exhaust Hoses melt. Maybe the pvc will be the weak link and melt and flood the boat before the motor cracks. I wouldn't use the pvc for anything more than temporary, but then again, four years later and my temporary gorilla tape is still plugging a leaky exhaust hose.

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Please support The Cystic Fibrosis Foundation
1976 Ski Nautique 351 Escort
1993 Ski Nautique purple and black 351 HO PCM


Posted By: peter1234
Date Posted: August-17-2015 at 8:31pm
gorilla tape is a whole different thing. id trust is more than welded stainless...........

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former skylark owner now a formula but I cant let this place go


Posted By: NAUTIQUEjunky
Date Posted: August-17-2015 at 8:32pm
Appreciate everybody's opinion and comments thus far.. Schedule 40 has to see close to 200F before it even starts to soften.. I agree if this pipe fails it will be in a joint.. and yes I did use high quality Oatly pipe cement for the fittings.. I don't mind being the guinea pig for testing it lol.. If it does fail like I said I don't pull far from the ramp so I will just have to shut her down immediately and get a tow from one of my buddys..

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1977 MasterCraft Stars&Stripes
1994 Ski Nautique
2000 Super Air Nautique
1986 Ski Nautique 2001
1999 Sport Nautique gt40 current










Posted By: peter1234
Date Posted: August-17-2015 at 8:42pm
good idea i would never listen to a plumbers advice either

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former skylark owner now a formula but I cant let this place go


Posted By: NAUTIQUEjunky
Date Posted: August-17-2015 at 8:42pm
By the way this is what the inside of a exhaust hose looks like after someone overheats the *************** out of there motor   
http://s1114.photobucket.com/user/862001/media/Mobile%20Uploads/20150814_084816.jpg.html" rel="nofollow"> [/IMG]

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1977 MasterCraft Stars&Stripes
1994 Ski Nautique
2000 Super Air Nautique
1986 Ski Nautique 2001
1999 Sport Nautique gt40 current










Posted By: 8122pbrainard
Date Posted: August-17-2015 at 8:55pm
Originally posted by NAUTIQUEjunky NAUTIQUEjunky wrote:

I did use hight quality Oatly pipe cement for the fittings.. .

What about the primer? I don't see any evidence of it in the pictures!

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/diaries/details.asp?ID=1622" rel="nofollow -

54 Atom

/diaries/details.asp?ID=2179" rel="nofollow - 77 Tique

64 X55 Dunphy

Keep it original, Pete
<


Posted By: NAUTIQUEjunky
Date Posted: August-17-2015 at 8:59pm
Originally posted by 8122pbrainard 8122pbrainard wrote:

Originally posted by NAUTIQUEjunky NAUTIQUEjunky wrote:

I did use hight quality Oatly pipe cement for the fittings.. .

What about the primer? I don't see any evidence of it in the pictures!

And you won't see the primer I used past the fittings Pete because I measured how far to apply it on the pipe/fitting so it wouldn't show.. my OCD kicked in

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1977 MasterCraft Stars&Stripes
1994 Ski Nautique
2000 Super Air Nautique
1986 Ski Nautique 2001
1999 Sport Nautique gt40 current










Posted By: peter1234
Date Posted: August-17-2015 at 9:01pm
Pete we have a new code here for gas exhaust venting we have to use the purple primer   in your neck of the woods too?


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former skylark owner now a formula but I cant let this place go


Posted By: baitkiller
Date Posted: August-17-2015 at 9:54pm
Originally posted by peter1234 peter1234 wrote:

cpvc cement is for cpvc.. please dont give bad advice. solid core pvc is generally rated for 180 deg but i would never use is (lowes home depot sells foam core) foam core is not for exhaust either i guess you could try sch 80 but it is only really used for 95 + venting exhaust on newer high eff heating /Hw systems .. i completely agree with above posts   dont trust the pipe dont trust the joints and def dont trust the glue..


Bad advice? Jesus H Christ what the hell is wrong with you? You allergic to sarcasm or so wrapped up in plumber tech you cant see over the sprinkler heads? STFU


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Jesus was a bare-footer.............


Posted By: a0128
Date Posted: August-17-2015 at 10:02pm


Posted By: NAUTIQUEjunky
Date Posted: August-17-2015 at 11:23pm
http://s1114.photobucket.com/user/862001/media/Mobile%20Uploads/i-dont-always-3kb7xs.jpg.html" rel="nofollow"> [/IMG]

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1977 MasterCraft Stars&Stripes
1994 Ski Nautique
2000 Super Air Nautique
1986 Ski Nautique 2001
1999 Sport Nautique gt40 current










Posted By: 8122pbrainard
Date Posted: August-17-2015 at 11:40pm
Originally posted by NAUTIQUEjunky NAUTIQUEjunky wrote:


And you won't see the primer I used past the fittings Pete because I measured how far to apply it on the pipe/fitting so it wouldn't show.. my OCD kicked in [

Your OCD is flawed. You still have the alignment marks on at the joints!

Peter,
I'm not aware of any ruling about having to use the purple primer in this area but, it sure is a good one. The other big problem with primer is not using it at all (typ. on DWV with plumbers cutting corners) or letting it dry before applying the solvent cement. I'm proud to say that after running close to 2000 feet of sch 80 10" and down to 3" and then hydro'd to 250 psi we didn't have one joint push apart. BTW, we have been back up and running for over 6 weeks now after the repair.

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/diaries/details.asp?ID=1622" rel="nofollow -

54 Atom

/diaries/details.asp?ID=2179" rel="nofollow - 77 Tique

64 X55 Dunphy

Keep it original, Pete
<


Posted By: NAUTIQUEjunky
Date Posted: August-17-2015 at 11:47pm
Lmao! You got me on that one Pete!

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1977 MasterCraft Stars&Stripes
1994 Ski Nautique
2000 Super Air Nautique
1986 Ski Nautique 2001
1999 Sport Nautique gt40 current










Posted By: Gary S
Date Posted: August-17-2015 at 11:56pm
Down in my part of Florida Pete the inspector wants to see primer slopped all over,don't see it,it don't pass

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http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS
95 Nautique Super Sport


Posted By: DayTony
Date Posted: August-18-2015 at 3:44am
I'm no plumber but i have built some pretty good potato cannons. and some not so good.
But knowing what the pvc looks like after a good range day I would have to say i wouldn't trust any bit of it below the water line on my boats. especially with the exhaust gasses which are extremely corrosive. i wonder what it would do to the pvc.

also do you have any idea how quickly you will be swimming with the fishes with a 3" hole under the waterline of a boat that small? I just finished safety drill training at my local coast guard base which covered this specifically. And just to give a little perspective, an open exhaust pipe below water line left unnoticed can leak roughly 150-200 Gallons per MINUTE, becoming exponentially more as the hole gets deeper in the water.
So play on the safe side and if you are going to be a test hamster than bring a hammer and some exhaust size wooden plugs if you don't already have some in your ditch bag. Because time to get towed in may be too long.
-Tony

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1988 Barefoot nautique-454


Posted By: backfoot100
Date Posted: August-18-2015 at 10:06am
Originally posted by NAUTIQUEjunky NAUTIQUEjunky wrote:

By the way this is what the inside of a exhaust hose looks like after someone overheats the *************** out of there motor   
http://s1114.photobucket.com/user/862001/media/Mobile%20Uploads/20150814_084816.jpg.html" rel="nofollow"> [/IMG]


EXACTLY!!!!! And this is designed to withstand that heat for short periods of time. Wait till you overheat the s**t out of that PVC. You won't have delaminated hose that simply needs replacing. You'll have a three inch hole directly thru the hull after the PVC has completely melted away.
This is no different than somebody putting an automotive rated carb, dizzy, alternator, starter or fuel pump on their boat. Sure, it'll probably work fine maybe for as long as you own the boat, but all it takes is that "one time" when it goes boom and your boat is up in flames or sunk and people can potentially die all in the name of saving money.

By all means let us know how that works out for you when that "one time" does happen.



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When people run down to the lake to see what's making that noise, you've succeeded.



Eddie


Posted By: GottaSki
Date Posted: August-18-2015 at 10:24am
meh. the late eighties budget centurians came with PVC pipes from the factory and are still going.after 25+ years. They are the dull ones with the fiberglass engine cover with a tiny apolstered pad on top of it.

Agreed, offshore, not even a consideration. I just don't buy most the doom and gloom.

They sound like blue man group on meth, don't like the sound one bit

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"There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing."

River Rat to Mole


Posted By: 74Wind
Date Posted: August-18-2015 at 10:35am
Keep 2 tennis balls in the boat,. In the event of an emergency they can be stuffed into the exhaust ends.

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1974 Southwind 18
1975 Century Mark II


Posted By: Hollywood
Date Posted: August-18-2015 at 10:58am
That won't keep the boat from sinking


Posted By: scootdogydog
Date Posted: August-18-2015 at 11:13am
this isn't the place I'd try to save a buck -- and usually when I can save a buck, I would. If you're purely removing the muffler, you'd need what, 3' per side of 3" copper? ~$200 total? so why try to save $150 on something below the waterline. my $.02

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http://www.correctcraftfan.com/diaries/details.asp?ID=7183" rel="nofollow - 1999 Python
1980 Ski Tique
1968 Mustang WIP


Posted By: SNobsessed
Date Posted: August-18-2015 at 11:31am
I made a cover frame out of PVC pipe for my Jet Jon. Not only did the material distort badly in summer sun, some of the properly primed & glued joints let go.

Don't know if it is economical, but you could wrap the PVC in epoxy resin-ed glass, then it would be safe. Put in hose clamp bumps while you are at it.    

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“Beer is proof that God loves us and wants us to be happy.”

Ben Franklin


Posted By: 74Wind
Date Posted: August-18-2015 at 11:31am
Was just something I read once, but it seems plausible in theory. A tennis ball diameter is 2.7 inches, not sure what exhaust tip inside diameter is exactly, maybe wrap in a rag first. Anything would be worth a try to not go down without a fight.

Mine has a transom ladder and no platform so they'd be easy to get to, not sure I'd wanna try it with a platform boat


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1974 Southwind 18
1975 Century Mark II


Posted By: Hollywood
Date Posted: August-18-2015 at 11:38am
His pipes are 3.5 in and 4 out. He needs a [4"] plug as Tony mentioned.


Posted By: M3Fan
Date Posted: August-18-2015 at 12:22pm
How much more resistant to heat are the fiberglass/epoxy components such as the hull hugger muffler, Invertaflo muffler, or in the case of the hull hugger, the fiberglass sections that go from the riser to the muffler? I've already had to replace one of those due to overtightening and probably heat from the PO years ago.

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2000 SN GT40 w/99 Graphics/Gel
2016 SN 200 OB 5.3L DI
https://forum.fifteenoff.com






Posted By: peter1234
Date Posted: August-18-2015 at 6:39pm
Originally posted by baitkiller baitkiller wrote:

Originally posted by peter1234 peter1234 wrote:

cpvc cement is for cpvc.. please dont give bad advice. solid core pvc is generally rated for 180 deg but i would never use is (lowes home depot sells foam core) foam core is not for exhaust either i guess you could try sch 80 but it is only really used for 95 + venting exhaust on newer high eff heating /Hw systems .. i completely agree with above posts   dont trust the pipe dont trust the joints and def dont trust the glue..


Bad advice? Jesus H Christ what the hell is wrong with you? You allergic to sarcasm or so wrapped up in plumber tech you cant see over the sprinkler heads? STFU

what does stfu stand for?

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former skylark owner now a formula but I cant let this place go


Posted By: Jonny Quest
Date Posted: August-18-2015 at 6:57pm
STFU = Shut The Freak Up. I have seem the word Freak replaced with a more colorful alternative.

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Current
2003 Ski Nautique 206 Limited

Previous
2001 Ski Nautique Open Bow
1994 Ski Nautique Open Bow

Aqua skiing, ergo sum


Posted By: peter1234
Date Posted: August-18-2015 at 7:33pm
uhm i was being sarcastic   ha ha

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former skylark owner now a formula but I cant let this place go


Posted By: 8122pbrainard
Date Posted: August-18-2015 at 7:57pm
Originally posted by M3Fan M3Fan wrote:

How much more resistant to heat are the fiberglass/epoxy components such as the hull hugger muffler, Invertaflo muffler, or in the case of the hull hugger, the fiberglass sections that go from the riser to the muffler? I've already had to replace one of those due to overtightening and probably heat from the PO years ago.

Joel,
You can NOT compare a thermoset to a thermoplastic. They are two completely different types of non metalics. Go back to your BMW!! It was not heat that busted up your hull hugger. Vibration and a cheap build/poor engineering if you ask me.

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54 Atom

/diaries/details.asp?ID=2179" rel="nofollow - 77 Tique

64 X55 Dunphy

Keep it original, Pete
<


Posted By: SNobsessed
Date Posted: August-18-2015 at 8:29pm
I respectfully withdraw my earlier suggestion. Got curious & looked this up on US composite site:

9. Do you sell high-temperature epoxy?

No. Our marine and commercial use epoxy systems can only withstand temperatures from 150 to 195 degrees. Most high-temperature epoxies on the market will require autoclave or oven cure cycles.

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“Beer is proof that God loves us and wants us to be happy.”

Ben Franklin


Posted By: marlo14
Date Posted: August-18-2015 at 9:52pm
Great idea if you are only looking for a test method. NOT a permanent solution. The pvc will fail and boat will sink. The resins used on the exhaust components are different, if you try to patch one of those using standard boat resin, it will not hold together over time. I agree with the idea of if you like how it sounds, spend the money and get the proper setup to avoid a catastrophe. My $.02


Posted By: NAUTIQUEjunky
Date Posted: August-19-2015 at 1:06am
Well guys this got much discussion as I hoped it would.. I built the y-pipe to see if it would work.. which it did.. will it work without failure?? Probably not! So I've come to the conclusion the added sound and unknowns is just not worth it using this method.. And the PVC has kinda a weird exhaust note .. So the Hull hugger muffler goes back on until I decide to purchase a Centek y-pipe in the future.."

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1977 MasterCraft Stars&Stripes
1994 Ski Nautique
2000 Super Air Nautique
1986 Ski Nautique 2001
1999 Sport Nautique gt40 current










Posted By: ScottZ
Date Posted: August-19-2015 at 1:33am
Have you thought about gutting the muffler?

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Scott Zuelzke
Lake Mitchell , AL
       
1984 Ski Nautique       
1972 Skier


Posted By: DayTony
Date Posted: August-19-2015 at 2:18am
I have a y pipe that might work for you, what exactly are you looking for?
I have this pipe which you could probably modify.
http://www.ebay.com/itm/NOS-marine-muffler-XT-TPD-3504-Centek-Industries-1200442-surge-tube-3-/121693132400?hash=item1c5579d670&vxp=mtr" rel="nofollow - http://www.ebay.com/itm/NOS-marine-muffler-XT-TPD-3504-Centek-Industries-1200442-surge-tube-3-/121693132400?hash=item1c5579d670&vxp=mtr

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1988 Barefoot nautique-454


Posted By: JPASS
Date Posted: August-19-2015 at 8:50am
Originally posted by DayTony DayTony wrote:

I have a y pipe that might work for you, what exactly are you looking for?
I have this pipe which you could probably modify.
http://www.ebay.com/itm/NOS-marine-muffler-XT-TPD-3504-Centek-Industries-1200442-surge-tube-3-/121693132400?hash=item1c5579d670&vxp=mtr" rel="nofollow - http://www.ebay.com/itm/NOS-marine-muffler-XT-TPD-3504-Centek-Industries-1200442-surge-tube-3-/121693132400?hash=item1c5579d670&vxp=mtr


That's a great deal. If he's not interested, I might be if it will work on our '92





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'92 Correctcraft Ski Nautique


Posted By: NAUTIQUEjunky
Date Posted: August-19-2015 at 10:08am
Originally posted by DayTony DayTony wrote:

I have a y pipe that might work for you, what exactly are you looking for?
I have this pipe which you could probably modify.
http://www.ebay.com/itm/NOS-marine-muffler-XT-TPD-3504-Centek-Industries-1200442-surge-tube-3-/121693132400?hash=item1c5579d670&vxp=mtr" rel="nofollow - http://www.ebay.com/itm/NOS-marine-muffler-XT-TPD-3504-Centek-Industries-1200442-surge-tube-3-/121693132400?hash=item1c5579d670&vxp=mtr


That's a 3in on all opening's The rear one would need to be 4in for the outlet.. But if your price is right I could make that one work.

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1977 MasterCraft Stars&Stripes
1994 Ski Nautique
2000 Super Air Nautique
1986 Ski Nautique 2001
1999 Sport Nautique gt40 current










Posted By: NAUTIQUEjunky
Date Posted: August-19-2015 at 10:12am
Here's the one I need it's on sale for $128. http://www.discountmarinesupplies.com/Centek_Exhaust_System_3_Y_Fitting.html?gclid=CIDfp8OOtccCFY09gQod98cHLw" rel="nofollow - http://www.discountmarinesupplies.com/Centek_Exhaust_System_3_Y_Fitting.html?gclid=CIDfp8OOtccCFY09gQod98cHLw

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1977 MasterCraft Stars&Stripes
1994 Ski Nautique
2000 Super Air Nautique
1986 Ski Nautique 2001
1999 Sport Nautique gt40 current










Posted By: Toertel
Date Posted: August-19-2015 at 10:24am
So you loose the entire big black bulky muffler over the trans and it gets souder...
Does it also improve airflow? How much louder?

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1994 Sport Nautique


Posted By: Hollywood
Date Posted: August-19-2015 at 10:41am
No. The Y-pipes replace the hull hugger muffler, not the invertaflows. You would need downtubes and then a Y pipe for the older boats.


Posted By: Toertel
Date Posted: August-19-2015 at 10:46am
Would have been nice to have the addded maintenance space for just 120$

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1994 Sport Nautique


Posted By: TRBenj
Date Posted: August-19-2015 at 10:58am
Starting in '92, all small block PCM's got 3.5" risers, not 3".


Posted By: turningpoint84
Date Posted: August-19-2015 at 12:40pm
Anyone ever thought about "T" off a 1/4" water line from the Cold Water pick up after the RWP and shooting it directly into the PVC pipe a connection?

Just extra insurance?

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Proud 1968 mustang owner and now
http://www.correctcraftfan.com/diaries/details.asp?ID=6454&sort=&pagenum1" rel="nofollow - 1970 Mustang


Posted By: Dreaming
Date Posted: August-19-2015 at 2:06pm
Originally posted by turningpoint84 turningpoint84 wrote:

Anyone ever thought about "T" off a 1/4" water line from the Cold Water pick up after the RWP and shooting it directly into the PVC pipe a connection?

Just extra insurance?


I don't see the problem being as much heat under normal circumstances, the issue is that when the engine experiences an overheat due to lack of water or water problems, you'll overheat the PVC.   If you were using the RWP as extra insurance, the problem doesn't go away, you are still relying on the RWP either through the engine or around it.    I actually think the bigger problem with PVC is that when you heat cycle it, it becomes brittle.   We see condenser water heating systems in our area that have used PVC piping.   Standard water temp is 85°-95°F and we have seen many failures due to the brittleness of the piping.   Yes, the pipes are 20 years old, but I think vibration, more heat, and exhaust gasses would increase to the degradation rate.   I think the OP has a point that getting it all correct as a trial is a fine Idea, but I'm glad to see that a Centek is on order.    


Posted By: gun-driver
Date Posted: August-19-2015 at 2:17pm
Just find a local place that does custom exhaust and have them tig up a Y fitting out of stainless.


Posted By: NAUTIQUEjunky
Date Posted: August-19-2015 at 4:31pm
Originally posted by gun-driver gun-driver wrote:

Just find a local place that does custom exhaust and have them tig up a Y fitting out of stainless.

Yeah I already thought of that Paul but I live in a pretty small town up here by Kerr Lake and the muffler shops we have here are deff not gonna tig.. they only have brazing and mig setups which is not detailed enough when looking for water and air tight setups.. And by the time I found and paid someone for there time and materials I could by a Fiberglass y probably

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1977 MasterCraft Stars&Stripes
1994 Ski Nautique
2000 Super Air Nautique
1986 Ski Nautique 2001
1999 Sport Nautique gt40 current










Posted By: DayTony
Date Posted: August-19-2015 at 4:40pm
I can roll sheet metal and weld something up if you give me some dimensions but out of stainless its going to be more expensive than the fiberglass stuff. can also use aluminum, that would be my choice first because its easier to work with and wouldn't need to be gas backed. either way though I wouldn't be able to do it for any cheaper than the centek pipe.

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1988 Barefoot nautique-454


Posted By: JPASS
Date Posted: August-19-2015 at 4:48pm
Originally posted by TRBenj TRBenj wrote:

Starting in '92, all small block PCM's got 3.5" risers, not 3".


Damn



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'92 Correctcraft Ski Nautique


Posted By: ScottZ
Date Posted: August-20-2015 at 12:08am
Change out the risers to 3".

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Scott Zuelzke
Lake Mitchell , AL
       
1984 Ski Nautique       
1972 Skier


Posted By: TRBenj
Date Posted: August-20-2015 at 12:16am
Or just buy the 3.5x3.5x4 Y pipe instead of the 3x3x4?


Posted By: ScottZ
Date Posted: August-20-2015 at 12:57am
That too. I missed the 3 1/2 version in the thread.

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Scott Zuelzke
Lake Mitchell , AL
       
1984 Ski Nautique       
1972 Skier


Posted By: JPASS
Date Posted: August-20-2015 at 8:15am
Originally posted by TRBenj TRBenj wrote:

Or just buy the 3.5x3.5x4 Y pipe instead of the 3x3x4?


I don't really need the Y pipe, but wouldn't mind having it in case the muffler blows again. For his asking price it was a deal. Don't they cost $250-ish for new?





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'92 Correctcraft Ski Nautique


Posted By: Hollywood
Date Posted: August-20-2015 at 10:36am
JFC
Originally posted by Hollywood Hollywood wrote:

Originally posted by Hollywood Hollywood wrote:

Jones was on the right path, Centek does make a Y with 3" or 3.5" inlets and a 4" outlet. This is just a "standard y", not a "surge fitting". Surge fittings are all the same size inlet and outlet diameters.
http://www.centekindustries.com/fittings.html" rel="nofollow - http://www.centekindustries.com/fittings.html


Posted By: TRBenj
Date Posted: August-20-2015 at 1:42pm
http://www.marinepartssource.com/newdetails.asp?pnumber=VL1200415&mfg=Centek&mcat1=22&mcat2=0&mcat3=0&category=&mfgcategory=Standard%20Y-Fittings&mfgno=1200415


Posted By: JPASS
Date Posted: August-20-2015 at 3:04pm
Originally posted by TRBenj TRBenj wrote:

http://www.marinepartssource.com/newdetails.asp?pnumber=VL1200415&mfg=Centek&mcat1=22&mcat2=0&mcat3=0&category=&mfgcategory=Standard%20Y-Fittings&mfgno=1200415


Thank you sir. Used to be $230. Good deal.



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'92 Correctcraft Ski Nautique


Posted By: Tadpole
Date Posted: August-20-2015 at 4:09pm
I ordered the 3.5 into 4.0 Centek for my 93 ski nautique. It sounds perfect and seems to give me a little bit more power. I love it and would highly recommend it.

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1993 Ski Nautique


Posted By: desertskier
Date Posted: August-20-2015 at 4:21pm
Originally posted by Tadpole Tadpole wrote:

I ordered the 3.5 into 4.0 Centek for my 93 ski nautique. It sounds perfect and seems to give me a little bit more power. I love it and would highly recommend it.


Can you post some pictures? How much new exhaust hose was required?


Posted By: NAUTIQUEjunky
Date Posted: August-20-2015 at 5:15pm
Originally posted by Tadpole Tadpole wrote:

I ordered the 3.5 into 4.0 Centek for my 93 ski nautique. It sounds perfect and seems to give me a little bit more power. I love it and would highly recommend it.

What about the exhaust down tubes? Did you get those from WML? Also what was the total cost so others with invertaflow SN will know for reference.

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1977 MasterCraft Stars&Stripes
1994 Ski Nautique
2000 Super Air Nautique
1986 Ski Nautique 2001
1999 Sport Nautique gt40 current










Posted By: Tadpole
Date Posted: August-20-2015 at 5:44pm
I think I spent $250 for the wire reinforced hose, but I could have used the cheaper one. I ordered it someplace online.   I had the interflow muffler. The hose attached directly to the exhaust headers.   I will take pictures and try to post a sound track when I get to the lake tomorrow. I have the 351 HO engine.

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1993 Ski Nautique


Posted By: desertskier
Date Posted: August-20-2015 at 5:55pm
Did the hose come in 6ft sections? Do you remember how much you needed?


Posted By: Hollywood
Date Posted: August-20-2015 at 5:57pm
The downtubes are ~$83 each at WLM.

N3's parts section is STILL down and STILL sucks a big one.


Posted By: a0128
Date Posted: August-20-2015 at 6:26pm
Originally posted by Hollywood Hollywood wrote:

N3's parts section is STILL down and STILL sucks a big one.


Need to click on the N3 Board Shop link then use the drop down to get to the parts shop. Rather rinky-dink if you ask me. The Parts Shop link displays a page that tells you the Online Parts Shop is coming soon. Been this way for as long as I can remember. I'd probably order parts from them if their web site was easier to use. Unfortunately for N3, nautiqueparts.com is way easier to use and I get a similar 10% discount.

Here is a link to the hoses on N3's site.

http://www.n3boatworks.com/product-category/parts-inventory/page/4/" rel="nofollow - Hoses



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If money can't buy happiness, explain beer and boats.


Posted By: Hollywood
Date Posted: August-20-2015 at 6:28pm
Ok, and then when I grab the drop down menu there is text on top of text. Garbage.


Posted By: a0128
Date Posted: August-20-2015 at 6:35pm
Originally posted by Hollywood Hollywood wrote:

Ok, and then when I grab the drop down menu there is text on top of text. Garbage.


Then try this link. It seems to work better.

http://www.nautiqueparts.com/" rel="nofollow - Link

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If money can't buy happiness, explain beer and boats.


Posted By: 8122pbrainard
Date Posted: August-20-2015 at 10:43pm
Originally posted by Hollywood Hollywood wrote:

N3's parts section is STILL down and STILL sucks a big one.

Speaking of N3, where has Zach been lately?

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/diaries/details.asp?ID=1622" rel="nofollow -

54 Atom

/diaries/details.asp?ID=2179" rel="nofollow - 77 Tique

64 X55 Dunphy

Keep it original, Pete
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