Because of its low emissivity and insulating effect, JET-HOT Sterling creates a thermal barrier to protect headers - inside and out - while reducing heat transfer into the engine compartment. But the good news goes beyond protecting headers from thermal fatigue. Plugs, wires, fan motors, water pumps and other heat-sensitive parts get a break, too, in a cooler environment. Plus, power normally increases and safety for racers improves with lower temperatures.
The graph shown to the left, developed independently by a major US automobile manufacturer, shows just how effectively JET-HOT Sterling beats heat. The company's engineering team was astounded by temperature reductions exceeding 300°F when JET-HOT Sterling was applied to standard exhaust components. Car Craft also took a cool breath, after measuring temperature reductions of over 60% on header surfaces following the application of JET-HOT.
Nevertheless, JET-HOT Sterling will normally boost power when applied to headers for two reasons. First, the coating promotes denser, more potent fuel/air charges by insulating the engine bay from exhaust heat. At the same time, it accelerates the pulsed-vacuum effect on “tuned” headers, resulting in more effective scavenging of cylinders. The increased velocity of exhaust gases produced by higher exit inertia not only clears each cylinder more quickly; it also draws in the next fuel/air charge more efficiently.
