high temp coating for header
10-17-2006, 12:55 AM
#1
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Join Date: May 2006
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Posts: 55
high temp coating for header
hey all..soo I have had a set of dynatech headers sitting around for awhile now due to some missing parts which I just recieved in the mail! YESS! But I was wondering if any one with this set up has or is considering getting a high temp coating for there headers? is it worth it spending the extra few bucks? ..I know my set up is 304 stainless, but I live in canada where rust can certainly be a problem! will they rust even though they are this grade of steal? or should I just poper in as is? thanks and cheers!
10-17-2006, 01:40 AM
#2
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Join Date: Mar 2006
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RE: high temp coating for header
There are two reasons for high-temp coatings to be applied.
First, is to prevent rust.
Second, is to reduce the thermal conductivity of the header. This keeps the underhood temperatures down, and it also can improve power a little bit by keeping the exhaust gases hot--otherwise they cool down, gas velocity drops, and the headers don't scavenge quite as well.
However, if you already have 304 stainless headers, then you're in luck. You don't need the coating. 304 is a very high grade of stainless and it will not rust. Furthermore, stainless steel already has poor thermal conductivity. You don't get any real benefit from adding the coating.
I say, save your money--you don't need the coating.
On the other hand, if you had plain steel headers (not stainless) then it would be a very good idea.
First, is to prevent rust.
Second, is to reduce the thermal conductivity of the header. This keeps the underhood temperatures down, and it also can improve power a little bit by keeping the exhaust gases hot--otherwise they cool down, gas velocity drops, and the headers don't scavenge quite as well.
However, if you already have 304 stainless headers, then you're in luck. You don't need the coating. 304 is a very high grade of stainless and it will not rust. Furthermore, stainless steel already has poor thermal conductivity. You don't get any real benefit from adding the coating.
I say, save your money--you don't need the coating.
On the other hand, if you had plain steel headers (not stainless) then it would be a very good idea.
08-19-2009, 10:58 AM
#4
2nd Gear Member
Join Date: May 2009
Location: SC
Posts: 247
I got the kooks lt without the coating, I talked to a friend of mine I told him it'll be 200$ more for the coating, he said unless you're putting your car in a show you're wasting your money.
Kooks are already reliable, and I don't see a reason to put a coating on except to reduce the temp under the hood, but like you said since you're not racing it won't be useful.
Kooks are already reliable, and I don't see a reason to put a coating on except to reduce the temp under the hood, but like you said since you're not racing it won't be useful.
08-19-2009, 06:03 PM
#5
2nd Gear Member
Join Date: Dec 2006
Location: Florida
Posts: 329
Wow, this thread is back from the dead...
I remember seeing an article in Sport Compact Car many years ago that tested ceramic coated headers vs. uncoated and the difference between underhood temperatures between the two was quite high while the car was idling, but the temperatures were the same when the car was travelling over 35mph.
Blair
I remember seeing an article in Sport Compact Car many years ago that tested ceramic coated headers vs. uncoated and the difference between underhood temperatures between the two was quite high while the car was idling, but the temperatures were the same when the car was travelling over 35mph.
Blair
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