Sentence:  [W]ill it be possible to mount a larger engine for use in La Paz? I doubt very much if the standard 165 would get off the ground up here with a student. I wish you would take that up with the factory and see if they can put out a job with a <WSD>suped-up</WSD> seven-cylinder job. The R-540 I think it is. 
Meaning of the word marked with <WSD> tags:  Of an engine, a motor vehicle, etc.: modified for higher performance.