PVC (Or ABS) Exhaust Tees and Piping

[Mark44]

CPVC is similar to PVC, but has added chlorine which reduces its reaction to heat. So it retains good mechanical strength even at high temp. Max temp of CPVC is 210 F. But if it was my ski I would go Aluminum.

Royal Flush should know this information. :biggthumpup:

There end of story now get a life.:arms:

Mark44

 

[SkiNaked]

Ummm, last I checked, EVERY squarenose has a PLASTIC waterbox. So does every Waveblaster. :biggthumpup:

Your incorrect... :bs2: Mine has an aluminum one. I put it in myself after blowing up the stock plastic one. :biggrin:

Yamaha learned its lesson and fixed the problem by putting aluminum waterboxes in the roundnose. If plastic was a good idea why did they waste money on every roundnose with the added cost of aluminum waterboxes?

Moral of the story: Using plastic in exhaust systems is a bad idea!

 

[sjetrider]

It Is!!! I would personally request that a few items (such as the exhaust) be upgraded if it were mine.

Why is it so wrong to disagree about the materials chosen for the exhaust and still think it's a nice ski?

I think it's simply because my opinion of the exhaust and Charlie's opinion of the exhaust are similar.

Charlie said he had Steve let him instal (personaly) your plastic flex exhaust hose????????? Says he wants to see if it works.







































JK
Respectfully
Brian

 

[DrewNJ]

I searched the Charlotte Pipe website and just a couple of others looking for ABS pipe that was rated at 200 degrees (the same rating as CPVC) but came up with nothing. Again, I could be wrong, but I have not found any available sources for "Hi-Temp" ABS piping. :dunno:

I think you'd be fine with the 140 degree rated pipe UNLESS there was a cooling issue, but Jeff claimed to be using 200 degree rated pipe which would be even better.

I know I don't wanna tear into my tray area unless I absolutely have to, which is why I would choose aluminum or stainless.

Here you go, try this page: http://www.dynalabcorp.com/technical_info_abs.asp

You should be able to find pvc on there too.

 

[the only couch rider]

if it is accesible.... pvc or abs, if not metal all the way....... sucks if you gotta cut your stuff open to repair a cracked piece of pipe.

 

[Mile9c1]

does anyone know what exhaust temps a 2 storke runs?

By the time they got to the tray area... not hot enough to burn your skin, so I'd guess well under 140 degrees.

 

[Mile9c1]

If plastic was a good idea why did they waste money on every roundnose with the added cost of aluminum waterboxes?

Aluminum just plain kicks ass. That's why Yamaha uses it for impellers too!

 

[sclevela]

By the time they got to the tray area... not hot enough to burn your skin, so I'd guess well under 140 degrees.

id be willin to bet if u covered the end of the exhaust with you hand it would burn it...... gasses (exhaust,air etc) tend to get away with being alot hotter before they will cause a noticable burn due to the fact that they immediatly spread out and fill the area in which they are in therefore mixing with the surrounding ambient temp and dropping temperature almost immediatly

 

[Mile9c1]

Your incorrect... :bs2: Mine has an aluminum one. I put it in myself after blowing up the stock plastic one. :biggrin:

Moral of the story: Using plastic in exhaust systems is a bad idea!

Oh one other thing. I guess you should feel lucky that you've never cracked an aluminum exhaust chamber. Because cracked aluminum exhaust chambers are 10X more common than blown waterboxes :bigeyes:

 

[Mile9c1]

id be willin to bet if u covered the end of the exhaust with you hand it would burn it......

I just seem to recall that my exhaust tube by the carbs never gets noticeably hot. I've never measured the temperature there but I don't ever recall getting burned while taking my carbs off, even after WOT runs.

Bottom line, nobody is exhausting more heat than Waterdawg's 1200cc engine. So if it works for him it will probably be good enough for you :biggthumpup:

 

[sflsurfrider]

Oh one other thing. I guess you should feel lucky that you've never cracked an aluminum exhaust chamber. Because cracked aluminum exhaust chambers are 10X more common than blown waterboxes :bigeyes:

now replace that chamber w/ plastic and tell me what you think would happen.

apples and oranges, mike.

 

[Mile9c1]

apples and oranges, mike.

My only point was that plastic is used in many high temperature applications. I forgot to mention exhaust valves! If it works, why bitch about it?

 

[Mile9c1]

now replace that chamber w/ plastic and tell me what you think would happen.

Actually now that I think about it... would you use carbon fiber for the exhaust tube? But you wouldn't use that for the chamber would you! Why not???

 

[sflsurfrider]

My only point was that plastic is used in many high temperature applications. I forgot to mention exhaust valves! If it works, why bitch about it?

yes, there are high temp plastics that have a heat range suitable for exhaust applications. unfortunately, abs and pvc do not make the list. if one does choose to use them anyway, one is taking ones chances.

nobody is bitching. its a discussion (in which you happen to be wrong.):biggrin:

 

[Mile9c1]

nobody is bitching. its a discussion (in which you happen to be wrong.):biggrin:

Hey I never said I'd use ABS :biggrin:

 

[sflsurfrider]

Hey I never said I'd use ABS :biggrin:

ah, yes then....

in my best joe pesci voice....

"im done wit dis guy!"

 

[sclevela]

ill go a step further and say i wouldnt disagree with using it in an area u can get to........ but i dunno if id bury it

 

[Mile9c1]

ah, yes then....

I'd take ABS over a carbon fiber tube, however.

 

[T-bone]

Hey I never said I'd use ABS :biggrin:

i dont have a problem with using abs.

 

[Mile9c1]

Well I guess SFL really is done, now we can get the facts straight :arms:

I doubt Jeff uses a high heat ABS, but regular ABS will survive at 200 degrees (like Jeff claims to have tested his exhaust at). Here's why I think so: we mold ABS parts where I work and when we fatigue test them we beat the piss out of them at 85C which is 185F, sometimes for several hundred consecutive hours. At this temperature the ABS is quite solid, it's not anywhere close to melting. At 185F you can't touch the parts, they'll burn you. I doubt a through hull exhuast gets this hot. Maybe if you ran your ski for a long time with no cooling water it would. But at that point your engine would be toast and your rubber exhaust hose will be burning up. So you wouldn't be riding anymore, so don't worry about it!

The high heat grades of ABS that I know of have polycarbonate mixed in. They stay stiffer at higher temperatures, I don't know if they really have a higher melt temperature.