 An analysis of the RA615H revealed that Honda had developed the power unit with the 2016 season in mind ; although no substantial revisions to the Technical Regulations had been put forward , the decision was made so that Honda could make a head @-@ start on developing its 2016 engine without wasting time trying to maintain development of a juvenile power unit in 2015 . Furthermore , with McLaren developing the MP4 @-@ 30 to have tight packaging , Honda introduced several radical concepts to the engine that allowed them to develop a smaller engine that weighed just 145 kg ( 320 lb ) and would fit within the confines of the chassis , with the trade @-@ off being that it required additional water cooling to keep temperatures under control . 
