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Location:
Colac, Victoria
Registered:
May 2002
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HPC coatings - advantages-disadvantages - benifits
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Tue, 15 July 2003 11:32
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heys -
quick reference to hpc coating - in particular on dump pipes ..
does this provide any additional benifit for piping life or cooling or is it just there to look pretty?
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Location:
Montrose, VIC
Registered:
May 2002
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Re: HPC coatings - advantages-disadvantages - benifits
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Tue, 15 July 2003 11:39
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It's good stuff - holds heat like nothing else, as well as being damned tough. I tried to remove a bit of the stuff with an angle grinder to weld something else on, it ends up destroying cut off wheels a lot faster than itself. Go grab it, make sure it's the black stuff though!
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: HPC coatings - advantages-disadvantages - benifits
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Tue, 15 July 2003 11:45
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all reports i've heard are that it decreases heat loss from the pipe, decreases under bonnet temps, slows rate of corrosion of the pipe... as for increasing power by retaining temp in exhaust, i think it would be slight... but would be worth it for the underbonnet temps and increased part life alone..
what about piston coatings? i'm interested to hear how they perform, compared to say.. the 4AGZE coated pistons...
Cya, Stewart
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Location:
Sydney
Registered:
April 2003
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Re: HPC coatings - advantages-disadvantages - benifits
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Tue, 15 July 2003 11:47
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HPC coating is not just for looks.
When used on dump pipes, extractor etc it actually keeps the temperature in the engine bay down and extends the life of the piping and everything around it. Definately not just for looks.
I guess the one disadvantage is that it is in Victoria, so if you live outside Victoria its the hassle of disassembling the exhaust to ship it to them to get coated.
The temperature in Turbo cars are quite high and the HPC coating helps lower the temperature, therefore the intake temperature will be cooler and give you a bit better performance.
Definately worth it for extractors and dump pipes in high performance cars.
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Location:
Montrose, VIC
Registered:
May 2002
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Re: HPC coatings - advantages-disadvantages - benifits
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Tue, 15 July 2003 12:27
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There's other companies that do it around australia too... although I'm sticking with HPC because a mates old man runs the place  and also because I had my stuff done there a while back, and I like the stuff, I'll be going back soon for some more.
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Location:
Brisbane
Registered:
May 2002
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Re: HPC coatings - advantages-disadvantages - benifits
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Tue, 15 July 2003 23:18
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Yup, heat insulation is the main reason most people get pipes HPC coated. I had my dump pipe HPC'd because it runs very close to the steering rack, and I didn't want to fry anything with excessive temperatures.
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Location:
Eskilstuna, Sweden
Registered:
May 2002
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Re: HPC coatings - advantages-disadvantages - benifits
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Wed, 16 July 2003 08:18
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Must agree, impressive stuff. Plus the guys there were good to deal with.
I had to send a bunch of stuff down there in a large box and it all came back wrapped up in bubble wrap and within two weeks.
Nice!
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Location:
Colac, Victoria
Registered:
May 2002
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Location:
Montrose, VIC
Registered:
May 2002
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Re: HPC coatings - advantages-disadvantages - benifits
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Wed, 16 July 2003 11:06
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Why not get the turbine housing HPC'd as well? They do them, too... Then fabricate a dirty great heat sheild for it, try to keep that evil heat away from frying stuff... 
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Registered:
May 2002
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Re: HPC coatings - advantages-disadvantages - benifits
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Wed, 16 July 2003 11:40
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Classique, while you've got the dump pipe off, check the coolant hose that runs behind the dump and under the turbo.
Easier to inspect while it's off, a number of gt4's and mr2 t's have died from this hose....it's got an insulation around it, and it's common for te insulation to hide the leak abit.
Sorry it's a bit off topic, but if you've ever had to change one....
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Location:
GoldCoast/Brisbane
Registered:
May 2002
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Re: HPC coatings - advantages-disadvantages - benifits
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Wed, 16 July 2003 23:33
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Just a quick question about the HPC coatings...
When they coat extractors..... is it a job that is done from the outside or inside or both???
One other question..... Lets say that the extractors are coated and maintain most of the heat within the manifold...... does this increase the temperature of the exhaust gases escaping by getting hotter from the temperature from within the extractors radiating into the gases passing by??
Just curious, as don't CAT converters start to DIE if exhaust gas temps become too hot?????
Hope I am making sense..... just got back from night duty and I'm almost sliding off my chair here!!  
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Location:
Adelaide
Registered:
June 2003
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Re: HPC coatings - advantages-disadvantages - benifits
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Thu, 17 July 2003 02:26
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Three quick Questions:
1. What does HPC stand for?
2. Does anyone know of a place in Adelaide that can do it?
3. How long would it be expected to last?
Thanks
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: HPC coatings - advantages-disadvantages - benifits
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Thu, 17 July 2003 04:37
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the exhaust gases are hotter.. than they would be without the coating. heat is lost from the gas to the extractors, whereas with the coating, this loss is reduced.
hmm, interesting point, from what i know, cat material works best around 400 deg C, and above that their efficiency decreases.. (well, the thermodynamics of the reactions work against efficiency, the actual platinum catalyst still works)
i'm not too sure on the max temp, but it is around 6-700deg C. the lower the temp, the longer it lasts, but more heat is generated in the cat when their is a rich mixture, since the fuel then burns inside the cat!!! i'd be more worried about rich mixtures than retained heat from coatings...
HPC... High Performance Coatings?
only australian distributor for HPC is in Victoria. are there other mobs that do as good work?? maybe a good time for a holiday to Vic
how long do they last?? a mate of mine has a set of 20 year old extractors on his racing KE15. i don't know who coated them, but it is still in almost brand new nick... the reduction in temp is such that you can hold your hand very close to the pipes when the engine is running, and after it shuts down, you can touch the extractors after a few minutes, and the are much cooler than the end of the exhaust pipe!!
Cya, STewart
[Updated on: Thu, 17 July 2003 04:40]
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Location:
Sydney
Registered:
April 2003
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Re: HPC coatings - advantages-disadvantages - benifits
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Thu, 17 July 2003 05:35
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There is also another company in Victoria which does ceramic coating on exhausts etc like HPC
Jet-Hot
26 Elizabeth Street, Castlemaine 3450, Victoria, Australia
Info: 03 54706416 Orders: 1800 700 HOT [468]
www.jet-hot.com.au
I am pretty sure the company is American based and this is their branch in Australia.
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: HPC coatings - advantages-disadvantages - benifits
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Thu, 17 July 2003 07:27
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When Jet Hot quote 3-4 days to do the job, change days to weeks.... 
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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PRICES Re: HPC coatings - advantages-disadvantages - benifits
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Fri, 18 July 2003 03:14
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Hey all,
got some quotes from HPC and thought i'd share. prices are GST inc.
4 cyl headers, coated inside and out, in polished ceramic finish $187. thermal wraps are not recommended on top of the coating.
Pistons $33 each. adds 2.5thou to top of piston and 1 thou to sides, so slight change in dimensions.
for heads, combustion chamber $33, ports $11 each, valves $11 each.
HPC also say that there are no thermal expansion problems between the coating and aluminium.
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with the question do they wear? some times yes some times no , every engine is different , the way people put engines together is different. We have seen and got pistons out of V8 supercars , Drag cars etc and they have been excellent. With pistons that have problems with the top ring lands , that can be caused by detonation or running to lean in the cylinder , not by the TBC
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so, the bottom line is, for $396 i can have ceramic coated piston, combustion chamber, valves and exhaust ports!!! (i wouldn't bother with intake ports)
i reckon i'll have to do it next motor
fwiw, at uni i work on TBC (thermal barrier coatings) for jet turbine blades. the coatings are around 50-100microns in thickness (0.05-0.1mm = 2-4thou) and reduce blade alloy temps by 100-150deg C (ie allow higher running temps of 1150C vs 1000C). as long as these coatings stay on, they should work well!
Cya, Stewart
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Location:
Adelaide
Registered:
May 2002
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Re: HPC coatings - advantages-disadvantages - benifits
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Fri, 18 July 2003 09:29
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WHAT!!!!
This is a cut and paste of an eMail from Rex to HPC...
Hi Chris
To coat a 4 cyl turbo manifold in the Hipercoat Extreme coating will
cost $440.00 including GST .
A lot of people use Australia Post to ship parts over, you can Register
or insure the parts through them
The Hipercoat Extreme is the best coating for turbos it can dramatically
reduce the skin temperatures on exhausts.
Best Regards
Craig
-----Original Message-----
From: Chris Kirby [mailto:two_fat_ladies@hotmail.com]
Sent: Monday, 19 May 2003 8:20 pm
To: hpcvic@tpg.com.au
Subject: Turbo manifold in SA
HPC,
Im looking at having my newly constructed Turbo manifold coated. You
guys
are the professionals so i was wondering what you would reccommend and
how I
would go about it (Im in Adelaide, SA). And of course what sort of cost
i
would be looking at.
Thanks
Chris
[/PASTE]
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: HPC coatings - advantages-disadvantages - benifits
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Sat, 19 July 2003 07:29
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difference is that your quote is for HiPerCoat EXTREME!! whereas mine was for just the normal HiPercoat. the extreme is thicker, made of better stuff and is safe to much higher temps.... i think $440 is still not bad considering the amount of temp drop you will have on the outside of the manifold... and more heat retained in exhaust gases... but it aint cheap either... but neither is a turbo, so it's all part of the territory
it's not often you see NA manifolds red hot, but you alwasy see pics of turbo motors with their manifolds glowing brightly!!!
ask them if they can get you in contact with someone near you who has had it done, so you can see it in person?
Cya, Stewart
| Rex_Kelway wrote on Fri, 18 July 2003 19:29 |
Hi Chris
To coat a 4 cyl turbo manifold in the Hipercoat Extreme coating will
cost $440.00 including GST .
A lot of people use Australia Post to ship parts over, you can Register
or insure the parts through them
The Hipercoat Extreme is the best coating for turbos it can dramatically
reduce the skin temperatures on exhausts.
Best Regards
Craig
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Location:
Adelaide
Registered:
May 2002
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Re: HPC coatings - advantages-disadvantages - benifits
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Sat, 19 July 2003 09:59
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Yeah,
I know it was for the HPC extreme, and it is quite a bit dearer. What im looking to find out though is just how much more worth it the Extreme stuff is.
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: HPC coatings - advantages-disadvantages - benifits
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Sat, 19 July 2003 10:12
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I'd be going for the best one for a turbo, especially if you're beefing up the boost
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: HPC coatings - advantages-disadvantages - benifits
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Sat, 19 July 2003 10:45
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well, the hipercoat can withstand 700degC, whereas the hipercoat extreme can go much higher.
the extreme will be much better in a turbo situation as too high a temp will cause the hipercoat to fail, so you may as well not have it there. if the extreme coat will be retained in high temp conditions, then it is worth it compared to the cheaper one.
is it worth it overall?? dunno, if you could see a coated and uncoated turbo on a dyno i guess that would decide it for you....
anyone seen that comparison?
Ca, Stewart
| Rex_Kelway wrote on Sat, 19 July 2003 19:59 |
Yeah,
I know it was for the HPC extreme, and it is quite a bit dearer. What im looking to find out though is just how much more worth it the Extreme stuff is.
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