Heat ..Carbon Fiber vs. Titanium pipes

[IZ]

The stock 1100 pipes put out a lot of heat under the seat..especially in the summer AZ heat.

What's the difference..if any..in heat output when comparing CF and titanium pipes?

 

[mors vito]

well carbon generally has has a lower heat capacity than titanium and other metals. Meaning it absorbs less heat, so it is cooler to the touch, if you touch it. Since carbon absorbs less heat, it will release more heat energy = hotter surroundings. Which is why you want to have carbon fiber exhaust in a open area rather than near the engine, like the Kawasaki 650r where carbon fiber can't take the heat because it can't get rid of the heat because there is already a lot of heat around it. If you want a colder butt, go with a titanium or some other metals. Though metals are more durable. No matter what kind of exhaust you get it will be hot in the summer time. As it is harder to disperse the heat energy according to newton's laws of cooling/heating.

titanium = ~0.52 J/g-°C
carbon graphite = ~0.17 J/g-°C

But you might want some personal experiences to truly make a decision.

[scduc]

Not sure if I understand that last statment. If the cans actually "asorb" less heat, then the heat would have to exit throught the tail, mixing with cooler air and making everything cooler.  Yes?

[mors vito]

Not sure if I understand that last statment. If the cans actually "asorb" less heat, then the heat would have to exit throught the tail, mixing with cooler air and making everything cooler.  Yes?

yeah sorry, I got them mixed up. Thanks.

[IZ]

So I should take a more serious look at pipes Titanium then?

I think either way..it's going to be hot under there.

If I want to eliminate it though..I should look at the boomtubes.

[Raux]

the reason the stock pipes are getting so hot is not the metal, it's the catalytic converters at the mouths of the pipes.

the CF and SS don't have them. The Ti do, if my info is correct, as they are they only ones road legal.

so, the Ti will still get as hot as stock running, just won't retain the heat like the stock cans after the bike is off.

the CF and SS won't be as hot running, and the CF will be the coolest to the touch after the bike is off.

[IZ]

the reason the stock pipes are getting so hot is not the metal, it's the catalytic converters at the mouths of the pipes.

the CF and SS don't have them. The Ti do, if my info is correct, as they are they only ones road legal.

so, the Ti will still get as hot as stock running, just won't retain the heat like the stock cans after the bike is off.

the CF and SS won't be as hot running, and the CF will be the coolest to the touch after the bike is off.

So any aftermarket slip-ons will get rid of this or do I have to get a whole system?

[ungeheuer]

So any aftermarket slip-ons will get rid of this or do I have to get a whole system?

No slipons will stop your arse from frying IMO.  Been there, done that.  Much of the heat you're feeling is from the right side aluminium sub-frame getting hot as a result of its close proximity to the stock front header snaking through the inside of it.  Gotta get that header out of there if you want a cooler butt  .  And piss off that great hunk of heat-sink posing as your flappergate too. 

Under-engine pipe will help.... several of em to choose from by now. 

[IZ]

No slipons will stop your arse from frying IMO.  Been there, done that.  Much of the heat you're feeling is from the right side aluminium sub-frame getting hot as a result of its close proximity to the stock front header snaking through the inside of it.  Gotta get that header out of there if you want a cooler butt  .  And piss off that great hunk of heat-sink posing as your flappergate too. 

Under-engine pipe will help.... several of em to choose from by now. 

I've got a nice, black scar on my leg from the left side of the subframe frying it after sitting in a traffic jam.  That got me looking at the Mark's Boomtube pipes. 

[thought]

No slipons will stop your arse from frying IMO.  Been there, done that.  Much of the heat you're feeling is from the right side aluminium sub-frame getting hot as a result of its close proximity to the stock front header snaking through the inside of it.  Gotta get that header out of there if you want a cooler butt  .  And piss off that great hunk of heat-sink posing as your flappergate too. 

Under-engine pipe will help.... several of em to choose from by now. 

would the m1100 evo's new routing solve this issue?

because i figure sooner or later you're going to be able to buy those kind of headers for the 696/796

[ungeheuer]

I've got a nice, black scar on my leg from the left side of the subframe frying it after sitting in a traffic jam. 

How many times have I told you not to ride in short pants?!  .

would the m1100 evo's new routing solve this issue?

Solve it? Not entirely. It would be less worse.  Whilst the exhaust is largely under-engine and the cans are slung low...... its the EVO's rear header which now snakes thru the rhs subframe on its way forward to do the siamese meeting with the front pipe.  So whilst theres gonna be less heat directly beneath the seat, the rhs frame is still gonna get hot IMO.

[Scissors]

I feel a lot of heat as well on my 1100, but it's from the rear cylinder's exhaust just as it comes out of the head, which is why my legs get roasted on both sides of the bike.

The only way to deal with that is to ceramic coat the "headers" themselves, so the heat remains in the exhaust gas and less is absorbed and subsequently radiated by the pipe.

[BoDiddley]

Pipe tape maybe?  I have seen a few in town with the old black tape.  This stuff looks more promising.

http://www.deicycle.com/catalog/1/motorcycle_exhaust_pipe_wrap_kits

[Triple J]

I had CF Termis on my 848, and titanium Remus cans on my M900. I could grab onto either one after a ride and not get burned...they were about the same from a heat standpoint. Get whichever you think look better. I have Aluminum cans on my SMT...same thing.

[junior varsity]

I had CF Termis on my 848, and titanium Remus cans on my M900. I could grab onto either one after a ride and not get burned...they were about the same from a heat standpoint. Get whichever you think look better. I have Aluminum cans on my SMT...same thing.

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