PVC y pipe gt40 muffler delete

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.

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..

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.

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!

Well I hope you used CPVC cement at least???? I think what the guys above me think.

8122pbrainard wrote: 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.

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..

By the way this is what the inside of a exhaust hose looks like after someone overheats the *************** out of there motor   
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8122pbrainard wrote: 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

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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Lmao! You got me on that one Pete!

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

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

That won't keep the boat from sinking