Editing H engine (section)

=== Powerboat racing engines ===
{{refimprove section|small=yes|date=November 2019}}
German firm Konig, who specialised in racing outboard motors,<ref>{{cite web |title=Quincy vs Konig |url=http://www.quincylooperracing.us/gpage8.html |website=www.quincylooperracing.us |access-date=16 November 2019}}</ref> built a few 1000cc  H-8s in the 1970s, which were basically two of their VC500 flat fours mounted one above the other, with the direction of rotation reversed on one of them. Each half of the engine was a water cooled 2-stroke with rotating disc valve driven by a toothed belt via two 45/90 degree pulleys, plus two siamesed expansion chamber exhausts, fed by two single choke carbs. Both cylinders at each end of each engine fired at the same time, hence the siamesed exhausts for each pair.