Carbon fiber exhaust

[neverlift]

Is it possible to use carbon fiber pipes for an exhuast? I know alot of you make carbon stuff, so here's a few??
would it catch fire?,not talking manifold or tubo back
from the cat or second resonator back,would the
weight savings be worth the cost?



Thank you for info and help

[BeerBringer]

It might work but it will be close. The carbon fiber can take the heat. The problem is the epoxy or what ever other plymer you might use.
If you can find a good resin(don't remeber if this is the correct word?)
It will probably work fine.

[s14xman]

i think the resin might not stand up to the heat. Iv'e seen thrust reverser backfire on C-17 aircraft shoot fire ball for a second, and i had to repair or replace all the composite panels because of the resin not holding up to the heat and the carbon plies splitting apart.

[lilredstiffy]

I'd hate to see the damage from 'bottoming out'

I don't think its worth the effort, if you want a light exhaust get something with thin tubing or made of titanium

[neverlift]

so no then,thank you guys

[neverlift]

lilred I dont see that bieng any problem,I'm not low at all

[axiomatik]

you don't even have to be lowered to scrape on a speed bump, and then your $1000 exhaust splinters to pieces. metal dents instead of falling apart.

[!Zar!]

Carbon fiber can't dissapate heat as well as metal can.

[SpeedMonkeyInc]

Carbon fiber can't dissapate heat as well as metal can.

Wouldn't that be a good thing? Keeping the exhaust energy contained?

Anyway. Carbon fiber is just too brittle. I don't think it would handle the vibration let alone a single impact. As stated alredy above.

It would be cool though to loose that much weight off the car!

[neverlift]

thanks guys,still dont think it would bottom out my car only scrapes fugly mud flaps, not installed by me, the heat dissapation I don't get cause I had a carbon muffler that you could touch while the car was running,like it never even got hot,so is that because it's at the very end of the system?

[alexchanman]

get a titanium system with a CF muffler, it should be light enough if not too light.

[neverlift]

hold on what do you mean too light ?with a flex pipe it would not break IMOP

[[email protected]]

99% of Carbon Fiber Mufflers are just overlayed...

Titanium or Inconel would be the lightest / best materials for an exhaust system... but you are looking at $...

[atom]

A real CF exhaust (meaning pre-preg "dry" carbon) would cost 10 times what your car is worth.................

[punxva]

what every1 else said, and Signal already makes one...

[koukidough]

not even worth it.

[chmercer]

lol why is everyone taking this thread seriously.

[lilredstiffy]

chmercer either contribute or don't reply

thanks

[Ricks15]

Titanium is the lightest and can take the heat. Just spend those extra hundred dollars for a well made titanium exhaust.

[axiomatik]

chmercer either contribute or don't reply

thanks

he makes a good point though

[Slidin240Wayz]

+1 for titanium

[[email protected]]

Titanium is the lightest and can take the heat. Just spend those extra hundred dollars for a well made titanium exhaust.

Not to be picky or anything...

But titanium is actually heavier then stainless steel etc... But it can be produced in a way to make a thinner pipe wall in result making a lighter tube / exhaust components...

[timtiminy]

have you actually ever came in contact with real titanium before..it is much lighter than stainless, im sure that it can also be thinner but the same thickness and size tubing from stainless to titanium will be much lighter.

[Ichi-Go]

Which means its lighter...

Helium is lighter than titanium why not make an exhaust out of that. Plus its inert so it can take the heat.

[sideview_180sx]

Titanium is the lightest and can take the heat. Just spend those extra hundred dollars for a well made titanium exhaust.

not the lightest. inconel is, along with the most expensive

spend 5 grand and have the only one:rofl:

[neverlift]

thanks guys, I searched for this but didn't find it now I'll look at signals.
Just looked at a cutaway of a carbon muffler, it is overlay,I thought of titanium but its pricey,good help keep it up

[the head]

thanks guys, I searched for this but didn't find it now I'll look at signals.
Just looked at a cutaway of a carbon muffler, it is overlay,I thought of titanium but its pricey,good help keep it up

If you think Ti is pricy quit this thread right now because full carbon will be more...much more not to mention as stated above it'll shatter if you hit a speed bump and bottom out. If you have mudflaps sounds like you need to focus ona lot more than your dream of an all carbon exaust.

Inconel is amazing shit if you can find someone to weld it for you I have also heard it doesnt bend for shit

[Efini~fc3s]

Not to be picky or anything...

But titanium is actually heavier then stainless steel etc... But it can be produced in a way to make a thinner pipe wall in result making a lighter tube / exhaust components...

One of the most common Titanium alloys is Ti-6%Al-4%V (90% Titanium, 6% Aluminum and 4% Vanadium) which has a density of about 4.5 g/cc. Titanium has an exceptional strength to weight ratio which is why they make good exhausts.

304 Stainless Steel (common) is Fe-18%Cr-8%Ni which is about 7.5 g/cc.

7.5g/cc > 4.5g/cc

Stainless steel is not lighter than Titanium.

Quote:
Originally Posted by Ricks15
Titanium is the lightest and can take the heat. Just spend those extra hundred dollars for a well made titanium exhaust.


not the lightest. inconel is, along with the most expensive

spend 5 grand and have the only one

The two most popular Inconel Alloys are Inconel 625 and Inconel 825.

Inconel 625 is 62%Ni-22%Cr-9%Mo-3.6%Nb-3%Fe-0.2%Mn-0.2%Si which has a density of about 8.4g/cc.

Inconel 825 is 46%Ni-24%Fe-22%Cr-3%Mo-2.2%Cu-1%Mn-0.9%Ti-0.5%Si-0.2%Al which has a density of about 8.1g/cc

8.4g/cc > 8.1g/cc > 4.51g/cc

Inconel is not the lightest, it's actually the heaviest out of three alloys talked about here. (SS, Ti, and Inconel)

Inconel is used because it retains it's strenth at high temperatures better than the other alloys i.e. at 800C it has higher strength.

An inconel header may be lighter than a titanium header because of the design. The Titanium header would have to be thicker than the inconel header for both parts to have similar physical characteristics at the operating temperature of the part.

Titanium exhausts are lighter than comparative stainless steel exhausts however I don't think the weight difference justifies the cost difference. The exhaust sits below the center of gravity of the car, you would be better off losing the weight from a different location on the car. Use the money saved on the exhaust to make the car lighter elsewhere. Titanium exhausts are really only necessary on full blown race cars where money isn't an issue.

[chmercer]

you are all wrong. thin wall aluminum is lighter.

[Efini~fc3s]

you are all wrong. thin wall aluminum is lighter.

true but Aluminum has a low melting point and wouldn't be able to withstand the heat that an exhaust system sees. That's why there aren't any aluminum exhausts on the market.

[the head]

4 > 810 owned

[[email protected]]

thanks for clearing that up Efini~fc3s!

[TokyoNights]

wow what a bad idea
,I thought of titanium but its pricey,
and carbon fiber isnt?