Hey, I was browsing through the internet looking for information regarding exhaust system tuning (mainly to play off of Rotarygod's idea about porting the exhaust ports of the renesis engine because I think the exhaust system of the engine would be detuned by this unless a custom header was developed). Anyways I came across the World Intellectual Property Organization and holy shite, some amazing tech articles, thought I'd post up a few (these aren't for the technically faint of heart :) ) Lots of good stuff in there

Engine exhaust http://www.wipo.int/pctdb/en/wo.jsp?wo=1997009520&IA=WO1997009520&DISPLAY=DESC

variable stroke honda engine http://www.wipo.int/patentscopedb/en/fetch.jsp?SEARCH_IA=JP2007067220&DBSELECT=PCT&C=10&TOTAL=27286&IDB=0&TYPE_FIELD=256&SERVER_TYPE=19-10&SORT=1220431-KEY&QUERY=%28FP%2FEngine%29+&START=1&ELEMENT_SET=B&RESULT=25&DISP=25&FORM=SEP-0%2FHITNUM%2CB-ENG%2CDP%2CMC%2CAN%2CPA%2CABSUM-ENG&IDOC=1801442&IA=JP2007067220&LANG=ENG&DISPLAY=STATUS

Rotary engine improvements http://www.wipo.int/ipdl/IPDL-IMAGES/PATENTSCOPE/67/46/5f/01465f.pdf