I am re-building a Hapi turbo with the intent to fly normalized compensation [without pressuring the manifold]. Normally aspirated engines suffer from reduction of manifold pressure as they climb, which pilots compensate for by pushing in the throttle. At about 7,500 feet the engine runs "out of throttle". As the altitude increases, the manifold pressure decreases and the plane slows. Flying higher becomes more and more inefficient.
Turbo normalizing can help manitain H.P at altitude. Excess heat is a problem in any engine but compounded by a turbo. This excess engine heat can decrease the life of componets there by causing more attention to maintanance. Adding a turbo to stock engines has a histroy of, and will compound cooling problems and decrease the operational hours of the engine by as much as 50% depending on the way the turbo is used and how well the cooling is handled. Turbocharging adds to the complexity of engine operation also, and adds more componets that can fail. I am convensed that if the cooling problem for any engine [turbo or otherwise] is address the engine can operate with more hours between overhauls, taking oils cooling into consideration also. I am attemping to address the cooling problems by using different materials [but proven materials] for critical componets of the engine. KRron
