Ok, so this may go into the ballot for quite possibly the dumbest post ever, but I am curious.
Are there any resin/fabric combinations that would withstand the heat if this was made from carbon instead of stainless steel?
I’m interested too. I have seen lot of muffler made of carbon, but never a exaust pipe or header.
Try this one and tell us how it worked.
http://www.keraguss.de/Infoblaetter/keraguss_p_infoblatt.pdf
To make something to withstand those temperatures, you’re going to need to use CMC (ceramic matrix composites), which currently are way out of the price range of the average automotive hobbyist.
Any sources for this material? It is not like I need a whole lot of it.
I am first going to attempt to make this out of fiberglass with a less expensive resin to see if my process will even work. It may fail at that part, so I will wait before ordering some expensive materials.
No, I don’t have any sources for it. We use it for aerospace (propulsion) where I work.
Pyromeral is very cool stuff. We looked into it for a project in the past, and yes, it is very expensive and they like to do most of it in house, i.e. not really a material supplier type of arrangement.
most everyone uses Ti instead of steel.
you can use CMC, but that involves making a preform, cooking it at high temps, and slowly adding in ceramic vapor, to deposit in the voids (in short)…VERY expensive, and VERY highly involved. Exhaust temps are higher than any normal resin can handle. Carbon fiber might also start to break down at those temps!! Burnoff at 530c without an inert atmosphere causes carbon to burn off as well, up to 5%
edit: Pyromeral…hmm…could be interesting.
I figured this thread would lead me to say “forget this idea”.
Pyrosic
yes…but how muche does pyrosic cost?
I cannot even get the company to call me back to tell me!
Haha well the mclaren has an exhaust manifold made by them. €20,000
Seems like I remember somewhere in the neighborhood of $1000 a yard, plus processing.
Even divided by 10, I am out.
I’m really surprise because the temperature near the cylinder head in the exhaust is approximately 1200°. In the specs they give 1000° max …
In the case of the motorcycle, pipes are bends after the cylinder head, the temperature is the higher (1200°) it’s not the same thing like the picture of the turbine.
For example, exhaust pipes in titanium doesn’t resist in this area after long time of use, the titanium become porous and make a hole.
Yeah, you’re getting your units confused. The exhaust valve edges will often see 1300F+ on a racing engine. However, Pyromeral’s operating temp is up to 1000C (1800F). I have no idea what its abrasion properties are, as we were looking to use an ablative due to the conditions.
-Mike