Anyone ever measure EGT temps on a non-turbo engine?
 

I'm giving my headers to my powder coater to clean up and powder coat. We're trying to decide whether we can get away with a regular high quality powder that will live to about 350 degrees, or if we need a high temp powder that will withstand 1200. He does a lot of motorcycle headers and said that on the 4 cyl Japanese bikes the exhaust temps reach 400 and need the high temp powder, but Harley and BMW pipes run cooler and are perfectly fine with a standard powder.

Normally I'd just err on the side of caution and go with the high temp, but colors tend to be limited to black, flat black, flat silver and bronze.

Egt
 

We measure temps around 2" from the port and they run in the 1200 deg F.
Mike Bruns

Do NOT powder coat your headers. You need to use a Ceramic coating. ( Like Jet-Hot, etc). No other coating will hold up to the heat.... Here, try this place.. I had them do several headers for a few of my projects.

Welcome to Performance Coatings

Here is the place I had mine done at, but for some reason, their website is down...

http://www.headercoatings.com/

Here is a picture of a header that they did for a VW Scirocco project I completed... The finish looks just like it did in this picture after 2 years....

http://members.cox.net/turbobratmoto.../DSCN1162a.jpg

Ed,

Ceramic coating is the way to go ... I've used it for snowmobile pipes to keep in the heat and
it holds up very well !

Cheers!
Phil

You're probably correct. I guess if I'd poured a second cup of coffee to get my brain in gear before I'd posted the question I'd have recalled that the IO360 in the Piper Archer I flew a couple decades ago would register 1100-1200 at cruise and even higher climbing out. And that's basically just another air cooled boxer 6 cylinder.

Thanks for the links. I know JetHot is THE source but when I talked with them about working on my 2 yr old headers they pretty much said they really didn't want to, and if they took it on they wouldn't warranty the work and would charge $350 as I recall. The friend who's done the powder work on my engine bits has done dozens of bike exhausts and headers for offroad Jeeps and offered to do my headers if I cover the $21 for the hi-temp powder. But now I'm rethinking the idea.

No problem... and I aslo forgot to mention that the headers in this pic were used.... They were not in bad shape, but none the less, they were still used. The pic is the way they looked after the process. IIRC, it was about $150 or so to do the headers....

Search out RoninLB.....here on Pelican. He seems to be the guru for aspects of CHT and EGT gauges / readings / how-to.... etc......

I have a CHT on my NA 3.6. It is located after the heat exchanger but in front of the cat. Probably about 25 inches from the exhaust port.

When running hard, I see temp up to 1300F.