Exhaust Coatings - MVAgusta.net
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post #1 of 14 (permalink) Old 07-06-2006, 09:10 PM Thread Starter
 
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Talking Exhaust Coatings

I was wondering if anyone out there has done any aftermarket ceramic coating on their exhaust systems? There has been some discussion regarding this topic, but it would be interested to know any results from this process. The companies that do this claim about a 1% increase in power for every 10 deg F reduction in temperature of the exhaust. The average reduction in temperature from stock is around 120 deg which would result in a 12% increase in horsepower. If this is true, coating our Brutale's exhaust system should increase power about 12-15 hp. Given the relatively low coast of a coating job, this is cheap horsepower, plus the motor will run cooler as well (a definite attraction by itself given the hot nature of these engines). What I am shooting for is a cooler, more efficient motor with a possible increase of around 12-15 hp. With the anticipated mods of cat pipe replacement, PC III, BMC filter and possible coating job, there maybe the potential of 130+ BHP from a good dyno job. Just food for thought and any experiences out there involving ceramic coatings would be appreciated.

Lorenzo
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post #2 of 14 (permalink) Old 07-06-2006, 10:31 PM
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An interesting thought and well worth a look. What does ceramic coating cost?

Would that require a new chip or does it make no difference to fuel injection and ignition timing?

- Matt H.


'05 F4 1000S
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post #3 of 14 (permalink) Old 07-06-2006, 11:03 PM
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Quote:
Originally Posted by lorenzotx
The average reduction in temperature from stock is around 120 deg

Lorenzo
I'm no expert but that seems a too large decrease in temp. Just a bit of healthy skepticism on my part. Having said that, running cooler is definitely a good idea.
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post #4 of 14 (permalink) Old 07-07-2006, 02:08 PM
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The temp reduction outside of the headers/link pipe is not what increases power. It's keeping the exhaust pipes and gases hot on the inside that does that. A side benefit is lower temps on the external headers and link pipe - but the interior exhaust gases stay hot longer inside:

"Wrapping headers maintains hotter exhaust gases that exit the system faster through decreased density. Increased exhaust scavenging is produced, along with lower intake temperatures." - from thermotec

- Matt H.


'05 F4 1000S
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post #5 of 14 (permalink) Old 07-07-2006, 03:04 PM Thread Starter
 
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hoovdinii said:
The temp reduction outside of the headers/link pipe is not what increases power. It's keeping the exhaust pipes and gases hot on the inside that does that. A side benefit is lower temps on the external headers and link pipe - but the interior exhaust gases stay hot longer inside:

"Wrapping headers maintains hotter exhaust gases that exit the system faster through decreased density. Increased exhaust scavenging is produced, along with lower intake temperatures." - from thermotec

I agree, it is not the reduction in temperature in of itself, but what is causing the reduction in temperature, that is using heat energy to help flow the exhaust better inside the pipe therefore increasing horsepower. BTW, my local ceramic coating guy will do my exhaust, including mid-pipe for around $165 USD. Even if I only got 5-7 extra hp, it would be worth it. Of course the cooling effect would be a big help, especially during the hellish Texas summers. They offer a variety of colors and they have a nice satin gold finish that just about matches the color of the colored stainless that is already on the pipes now. I think having a nice uniform gold satin finish from header to mid pipe would enhance the asthetics as well.
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post #6 of 14 (permalink) Old 07-08-2006, 06:03 PM
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Where does one go to get this ceramic coating done? And will your $165 guy deal w/ shipping?
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post #7 of 14 (permalink) Old 07-08-2006, 06:23 PM Thread Starter
 
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Quote:
Originally Posted by giomanach
Where does one go to get this ceramic coating done? And will your $165 guy deal w/ shipping?
I am fortunate to have the coating company here locally right done the street. However they have a website and I am sure they will ship your exhaust after the project is done. However, there are folks in California that do the same kind of work and I believe there are some companies in Encino as well. Just Google ceramic coatings in California. My concern was to find someone who could coat the exhaust with a color that closely matches the stock heated stainless. My local guy has a nice golden color that looks very similar to what is stock. The other benefit is to have a nice nice golden satin patina from the headers all the way through the midpipe. I think this will give a nice finished look in addtion to adding performance.

Lorenzo
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post #8 of 14 (permalink) Old 07-08-2006, 06:25 PM Thread Starter
 
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Quote:
Originally Posted by giomanach
Where does one go to get this ceramic coating done? And will your $165 guy deal w/ shipping?
Here is the link to my local coating company.
http://www.polydyn.com
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post #9 of 14 (permalink) Old 07-10-2006, 07:36 PM
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post #10 of 14 (permalink) Old 07-11-2006, 10:41 AM
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I have my headers and mid pipe ceramic coated with Ti exhaust cans on the F4. From my previous dealings with track and club race cars I would be extremely skeptical of any real gains in bhp. Do it for thermal efficiency not bhp IMO.

JamesC

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