| Author | Message | ||
     Rivrunr |
Just has a stock header pipe ceramic coated, on my 09 uly, (3400 miles) in an effort to help the warm leg problem, no other changes to the bike ,bone stock. Now the the surface temp on the header pipe is 150-200 degrees hotter than the uncoated pipe. HELP any ideas | ||
| Od_cleaver |
I remember hearing that an exhaust leak can cause this. However, I don't have any first hand knowledge that this can be true. Did you replace the exhaust gasket (I assume that there is one)? | ||
| Rivrunr |
I had a second stock uly pipe and that's, the one I had ceramic coated. I had High Country Buell/HD swap the two pipes. The invoice shoes new gaskets. | ||
| Etennuly |
The ceramic coating works by containing the heat within the pipe. If you measured the temperatures with it sitting still idling it seems that the high readings would make sense. | ||
| Electraglider_1997 |
So what has been gained by ceramic coating the pipe? | ||
| Dr_greg |
Looks cool! Well, that was my reason...plus, it will never discolor. --Doc | ||
| Rivrunr |
It was supposed to have kept more of the heat in the pipe as explained to me. The pipe does look better but I would not have spent the $ on looks, function before form you know. What kind of surface temps are you guys getting at idle? Thanks | ||
| Will547_us |
"Looks cool! Well, that was my reason...plus, it will never discolor." I'm seriously considering using HPC to coat my header when my Drummer arrives. I had the headers on my GMC coated 15 years ago and they look nearly as good as new! A friend said the proper way to do the coating was to do it inside and out? I don't remember if mine were that way, were your Uly headers done inside and out? Cheers, Will (Message edited by will547_us on May 31, 2009) (Message edited by will547_us on May 31, 2009) | ||
| Blake |
1. How are you measuring the temperature? 2. How are you ensuring that all factors are identical for the two different scenarios? 3. What type of coating and what color and finish texture is it? Most infra-red (IR) temperature sensing meters will not accurately record temperature of a reflective metallic surface. It is unlikely that the laws of physics have broken down. The likeliest explanation is that one or both measurements are grossly inaccurate due to significant IR reflectivity of the surface being measured. The extreme difference in temperature that you report leads me to suspect that your coated headers are not IR reflective, but the stock finish indeed is. An interesting side note: Though an IR absorptive coating will significantly reduce actual surface temperature of headers, greatly increased heat radiation can render the effect moot as the same or even greater amount of heat reaches you leg, just more due to radiation and less due to convection. I learned this after having some headers coated inside and out with flat black ceramic. I suspect that anything less than the glossy silver metallic ceramic coating will end up producing significant heat radiation, where the stock bare metal finish does not. (Message edited by Blake on May 31, 2009) | ||
| Rivrunr |
Blake-- I even stepped up to the plate and had something called insulcost applied to the pipe prior to having the ceramic coating applied. It was supposed to insulate even more heat. I chose a steel gray color for the final coat over the insulcoat and it's not a shinny finish. The inside of the pipe was not coated. Wish I would have known the difference between the IR and radiated heat scenario. The pipe does look though. I guess special ops heat barriers are next. thanks | ||
| Blake |
I found that I really like header wrap. It's VERY effective. | ||
| Rivrunr |
I was wondering about header wrap, I might give it a try when I feel I can r&r the pipe myself it's a little above my comfort level right now. Thanks for the info. |
