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This question continues to be asked by all levels of the racing community. We have followed up on this with a top coating specialist and learned coatings are very helpful to both the life and performance of pistons as well as many other engine components.  Coatings are used to reduce the effect of heat caused by extreme applications. When a ceramic coating is applied to the top of a piston, it acts as both an insulator and barrier. First, the heat is dispersed or reflected away from the piston surface. This surface insulation reduces heat transfer to internal components such as rings, pins & rods, while helping to prevent oil contamination through oxidation. Second, a thermal barrier coating (ceramic) on the piston top and a dry film lubricant coating on the sides, will help control thermal expansion due to heat transfer allowing tighter piston to cylinder clearance. An additional benefit is the ability to move the top ring slightly closer to the deck of the piston, which increases compression and ring seal. Third, if the entire combustion chamber and valve faces are ceramic coated, the area can withstand greater chamber temperatures without failure. All this adds up to the ability to run higher compression, leaner fuel mixture, and a little more timing for a net gain of substantial horsepower. Ceramic coatings work. If your engine builder is a NASCAR guy or a Top Fuel type, he probably already knows about coating since many have been using them for years. It’s time for competitors at every level to reap the benefits of ceramic coatings. Every setup is different and every application is unique but in each case there are proven advantages with coatings!   Coating prices...

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