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In order to accurately determine the proper turbo Precleaner to use with any specific make or model of a diesel or gasoline engine, your must first calculate the C.F.M. (cubic feet per minute of air) requirement of that engine. In making this calculation, it is important to note that any change in the R.P.M (revolutions per minute) or the addition of a turbocharger can alter the C.F.M. rating of the engine.
Air (CFM) = R.P.M x C.I.D. x Vol. Eff. / 3456