TTI vs Dougs

Mattax said

This shows a problem in the testing. Ambiant (air) temperature can not be read with a 'gun'. They can only read surface temperatures. Even there, on the more expensive ones can be set to compensate for the surface reflectivity.
That doesn't mean the test is invalid. Just their summary interpretation of what they were measuring is incorrect. A surface near the header very well could have been 200* cooler.

It's unfortunate there's no specifics about the coating.
It could have been whatever it is these folks use. Xtreme Performance Heat Coatings
or one of these products of the same name. Xtreme Temperature Coating - High Temperature Paint - Header Paint - Stove Paint
Really no information about the products in either case.

Click to expand...

Agreed that Ambient air temp can't be read with a gun. Bad choice of words by the author of the article, however, the claim of 200 degree temp drop is valid as tested in this article. Also, his suggestion that a temp drop of that magnitude in an enclosed unventilated space ( underwood with no fresh air inlets) would make a significant power difference is also valid . My take-away is the same as Dennis H in his post above.. any heat drop under the hood is welcome even if that's the only benefit. I am also inclined to believe that TTI knows exhaust technology as good or better than most and if they offer this option, it should work pretty well. I have it, I use it, my under hood temperatures are most definitely lower than the old exhaust manifolds and headers I used in the past. As well, my headers look as good as they did when I installed them 1200 miles ago. To me the coatings were worth the extra expense.