Thats probably why its only the cat-back. And the exhaust doesn't get that hot anyway.

 

Depends on what type of aluminum they used...seeing as it's piping I am pretty sure they use a much lower grade. Some aluminums tend to melt as low as 1200 degrees. They will also heat cycle and become more brittle compared to steel. I would definately not run a aluminum downpipe as I guarantee on a road course you could deform it.

 

how did you get the video to post up that way and not as link.. I didnt think Evom supported the embed.. Id love to know because it helps to know where the video traffic comes from when post like this..

 

Aluminum race muffler, interesting.
Wonder how much lighter it is then a Burns Stainless muffler.

 

Can you get some interior shots of the exhaust note?

When I hear the exhaust in my car its always coming from the engine bay not from the rear. Thats probably why I get so annoyed from it. If the noise comes from the rear I wouldnt mind too much because its passive, but from the front its like its drilling into my head.

 

These guys are awesome. They are making my entire turbo kit. Manifold, downpipe, intercooler piping, small battery kit, and eventually the same exhaust. I will post before and after pics as soon as the kit is done.

 

Ok everyone first of all if your downpipe ever gets to 2000 degrees your turbo is gonna be melted. Second if you take your entire exhaust off the exhaust is so cooled already by the end. i have a downpipe thats just mild steel so i still retain the awesome flow. also its very high quality aluminum not junk. i two stepped quite a few times and guess what nothing is melting so if flames fly out of it im sure its good. The muffler is 2 pounds which is gonna be lighter than cheap and i mean very cheap thin wall stainless which will warp. everyone thinks stainless is the only way to go. Think out of the box supra guys have been running aluminum exhausts and even downpipes. Even a roadcourse car ran a downpipe with thicker walls with no problems a whole season. I see no problems i welded aluminum it can take some heat.

Ok what else did i need to answer um oh inside is alot quieter than outside. i rode around with my sis and she was impressed over my hks which is a quiet exhaust. Aluminum asorbs sounds and doesnt resonate them another problem with stainless it resonates like crazy hence loud interior and exterior. this exhaust is just a single muffler where my hks was a resonator and a muffler and if destroys it. it is very stealth people actually called it a grocery getter with that exhaust thats what im talking about bye bye loud exhaust tickets from fartcans everyone. its 3 in pipe also you can get more mufflers or whatever you want

mike awd you just post the link of the video not the embed and it will automatically do it for you. Do i get any parts for that lol jk jk someone did tell me to call you for parts might have to do that sometime lol


Also any more questions keep it up i will answer as soon as possible. As far as vids i might have to enlist a friend and right now my clutch is shot and so is my tranny now. Thank you for the interest

 

FYI most aluminum will start to deform at 1200 degrees which your o2 housing and front part of the downpipe can see. It is not uncommon to see ~1700 degrees in the exhaust manifold on the road course.

With that said I have comtemplated a very similiar idea as aluminum does absorb sound very well and the catback is not something that needs to maintain heat for exhaust velocity. Problem is there aren't many muffler options or shops close that charge decent rates. Props for you to going outside the box. Curious as to what grade of aluminum was used too?

 

oh one more thing it fits a jdm rear all you do is cut the tip and your good to go cant beat that

 

First off, you aren't "thinking out of the box." Don't talk down to us, as we've already discussed this here and it has already been done numerous times on various cars including EVOs. I've got a 4" aluminum cat back sitting in my basement I made 3 years ago.

https://www.evolutionm.net/forums/we...-cat-back.html

That said, the burns muffler is similar in weight. However, it's also rebuildable and extremely compact. Not to mention very well made with superior materials given the temperature range of the applications.

Stainless is going to hold up better, where you come off saying it's cheap is laughable. The whole reason to use aluminum is that it's so much cheaper then Inconel 625, 321 stainless and titanium.

6000 series aluminum has a solution temperature under 1000 degrees. It has an artificial ageing temperature of 325F. Anything above that temp wants to harden the material rather quickly, leading to fatigue issues.

I'm a fan of aluminum for exhaust systems because it is so cheap for it's weight, but it is not the best material to use. I've got a box of 0.035" wall 321 stainless for a downpipe and 0.065" wall 6061 aluminum for the catback sitting around waiting for me to get some time to weld it up.

 

Let me see that aluminum exhaust after a year of daily driving and then we'll talk.

 

If you build the hangers right, there is very little stress in the tubing and it seems to hold up pretty well from the few street cars I’ve seen posted using aluminum exhausts. If something hits it though, it's going to dent/collapse.

 

aluminum gets more brittle with every heat cycle. I bet a dollar its a headache on a street car.

also everything I read says aluminum resonates more than metals. obsorbing sound is exactly what causes resonance. if sound goes in it has to get back out = resonance

I will give two thumbs up for experimenting

 

We actually sell this exhaust system of TAB's and has proven to be very robust. It's seen the harshest conditions I would expect anyone could see being in the Midwest. Terrible roads, -10 degree weather, snow, salt etc (no road race examples yet). The previous posted link "https://www.evolutionm.net/forums/welding-fabrication/467055-evo-aluminum-cat-back.html"
is the same system made by TAB. Shearer just started fabricating aluminum exhaust systems as well.

Of all the mufflers that have come through here, I havent found one as light as the 2lb aluminum one used in these systems. These systems typically utilize a stainless downpipe, no one as of yet has an aluminum dp.

-Colton
ImportEvolution.com
319-665-6612

 

Yeah i would stick with a stainless or mild steel downpipe. i was not saying stainless is cheap but to try to get to the same weight your gonna have to use paper thin stainless and its gonna be alot easier to break than alot thincker aluminum. i do daily my evo in snow and salt i live in a area where salt is how they plow lol. i might paint it so it doesnt corrode like crazy but other than that i should have no problems at all. and yes my end of my downpipe while beating on it gets up to 1100 degrees or so but i mean thats not how hot the pipe is. pipe is maybe 700 800 degrees top. I will see how mine holds up but i am forseeing no problems. Also if i have any problems guess what its warrentied. and one more thing i worked on aluminum diesal tanks and tanks would come in 20 25 years old and where still not corroded through by the straps. so aluminum can hold up to salt very well