Stack Idea for diesels?

Hey guys I was wondering, is it smart to use 4" Aluminum Irrigation pipe as a exhaust stack on a diesel truck? I've seen/heard people using copper tubing for stacks on diesels, I did some looking and aluminum melts at 1221* F and the exhaust on my dads truck only gets to 1,250MAX at the pyro on the down pipe after the turbo at WOT pulling a 25,000lbs trailer up a grade. going 60+mph. now I can tell you the exhaust pipe underneath the truck only gets to 1,000* F before the gutted converter and about 800* F at the side pipe on it right now.

Now that said My dad IS NOT going to put it through the bed, only outside it on the passenger side front corner of the bed. how tall should it be since we have a fithwheel camper and a 28' goose-neck flatbed trailer? the camper isn't used much so no worries about getting it black because it is far enough from the excessive amount of smoke it makes when the HPOP and turbo up-pipes is working like they should.

And if you got a truck Gas or Diesel With a stack feel free to post here.

I wouldnt. Thats just me though, im not a scientist. I just wouldnt trust it.

no.. bad idea. aluminum admits toxic fumes when heated. plus its pretty thin, and aluminum has a low melting point, which means that it could deform. just get some steel pipe and paint it black-hi temp paint

willis923 wrote:

no.. bad idea. aluminum admits toxic fumes when heated. plus its pretty thin, and aluminum has a low melting point, which means that it could deform. just get some steel pipe and paint it black-hi temp paint

Willis From where I'm from ECO people in office consider Diesels the Devils brother because they are Heaping toxic black smoke emitters, AKA Washington State. so we are not at all worried about it. Like I said Aluminum has a melting point of 1221* F the exhaust only gets to 400-900* F at running temps around town and running WOT on the freeway up a grade so its not going to deform.

I'm about 99.9999% certain that AL does not emit toxic fumes, unless heated to a point WELL beyond "normal", beyond the melting point even. Generating fumes from actually burning it MIGHT be another story, but if I'm wrong, y'all better put away your aluminum pots and pans...

As for the exhaust system- there has GOT to be a good reason we NEVER see aluminum exhaust pipes.

my mistake doc.. i was assumeing. since its irrigation pipe, and is exposed to the elements, i figured its galvanized. which WILL emit noxious fumes.. either way, like you said. there is a reason we dont see aluminum exhaust

I've seen them before they have a different noise to them, Like have you guys seen Square tubing used as a Exhaust pipe/stack? or a headache rack on a truck used as a Exhaust system?
And the High Quality Stainless steel used on Diesel Exhaust's is mostly Aluminium. 30% Stainless and 70% AL,

Theres a difference between high grade aluminum and the stuff they use for irrigation.

I know....... I looked and its a higher quality irrigation pipe, its the same thickness of electrical Conduit that I have.

thanks TD! today I went to town, looking for a 8' long peice of 4" tubing and the two 90* elbows for exhaust is $100+, Stainless was about $150, might as well put the POS muffler back on and get 8mpg vs, straight pipe and get 15mpg

OK, Thanks TMJ That may just work.