Has anybody ever tried this? I know that aluminum exhausts work; But will it work pre-turbo? It's 6061 tubing going into a stainless adaptor piece that will be home to the wastegate. Welcoming all opinions!

 

Don't run antilag....lol Might be gettin kinda close to the limit of that 6061 though

 

 

I would not do that

 

What thickness of aluminum is that? I'll be definitely interested in seeing how well it holds up. you should take into account the fatigue characteristics. And yield strength at temperature.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by k24em2 &raquo;</TD></TR><TR><TD CLASS="quote">Don't run antilag....lol Might be gettin kinda close to the limit of that 6061 though</TD></TR></TABLE>

dude anti lag would be sick in that thing imagine a car backfiring then bam the exhuast shoots out of the bottom of the car hahha

 

Heat is one thing, heat and pressure is a whole different ballgame. I wouldn't give it long. Judging by the fact that it's not welded up, i'm guessing you feel the same and thought it would be funny to make a post about it? lol

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by k24em2 &raquo;</TD></TR><TR><TD CLASS="quote">Don't run antilag....lol Might be gettin kinda close to the limit of that 6061 though</TD></TR></TABLE>

exactly what i was thinking... but i dont know!

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bailhatch &raquo;</TD></TR><TR><TD CLASS="quote">I would not do that</TD></TR></TABLE>

care to go any further into detail as to why you would not do that?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by .RTErnie &raquo;</TD></TR><TR><TD CLASS="quote">What thickness of aluminum is that? I'll be definitely interested in seeing how well it holds up. you should take into account the fatigue characteristics. And yield strength at temperature.</TD></TR></TABLE>

roughly .065" i believe...


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">Heat is one thing, heat and pressure is a whole different ballgame. I wouldn't give it long. Judging by the fact that it's not welded up, i'm guessing you feel the same and thought it would be funny to make a post about it? lol</TD></TR></TABLE>

Thats the same mindset I have. He's willing to try it. The turbo's are in the back of the car so I'm building I guess really long 3" up-pipe's connecting the headers to the turbo's. One thing I have also been thinking about is running at the track vs. on the dyno with the whole heat issue.

I really don't know if it will work or not. I think it will!

 

Its a bad idea as far as turbchargers are concerned....

You want the largest temperature and pressure drop as possible across the turbine wheel... making the pre turbine piping out of aluminum will dissipate the heat at a much higher rate than the ss... lowering your dT across your turbine wheel.

Try doing thermal coatings inside and out... and measure temperature loss with some temp probes...that would an interesting comparison (alum raw, alum coated, mild steel, 304ss, 316ss, inco)

 

haha, give it a shot but hang the turbo with some extra safety wire just in case

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bigTom &raquo;</TD></TR><TR><TD CLASS="quote">


care to go any further into detail as to why you would not do that?

</TD></TR></TABLE>

fatigue problems mostly, but now that I know it's at the back I agree with what ernie said about loseing some of your energy. Why not use some 18g stainless? it's pretty light too.

 

im still trying to figure out why ppl use aluminum for high heat exhaust applications especially on turbo setups stainless steel for the win comrade

but thats my .02 cents...

 

I've seen aluminum adapter flanges (for bolting a turbo to a stock manifold) melt.

6061 has a melting point of 1090*F.
5052 has a melting point of 1130*F.
7075 has a melting point of 900*F

 

My guess is 1000+ deg F and 30psi pressure inside the alum. tube will make a very interesting looking aluminum balloon!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">My guess is 1000+ deg F and 30psi pressure inside the alum. tube will make a very interesting looking aluminum balloon! </TD></TR></TABLE>

maybe it'll be like blowing glass

 

exceptional webpage texan comrade...keep on truckin

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">My guess is 1000+ deg F and 30psi pressure inside the alum. tube will make a very interesting looking aluminum balloon! </TD></TR></TABLE>

Yea.....hes gonna have a 3" tube instead of a 2" tube rather quickly

 

aluminum oxide has a much higher melting point than 5-6000 series alumium

FYI 7k series aluminum isn't weldable and can't be mandrel bent like that

Dont put any load on it...and minimize the stress on the part..and I bet it lives longer than you think weld some heat sinks on it too.. lol

 

Yes but aluminum oxide forms a layer less than a mil thick and it is brittle. When you weld aluminum, any oxide forms "tectonic plates" over the puddle. It's not going to keep the manifold from melting or deforming.

I just don't understand why people are willing to risk so much for a little weight savings. Why not use Titanium tubing? Cheaper than buying a new exhaust every 2 races.

 

Fence post.

/Thread