howardsmed
Ragged trousered Philanthropist
I found this dyno sheet when i was tidying up the external hard drive
the engine is one i built for Steve Mann CRMC sidecar racer, this is about 6 years old now, the lower trace is using a Megacycle 25-020 cam, the higher trace is a Smedspeed 2.5 cam, which is the same cam but with some computer smoothing and more valve overlap. the lift and duration are exactly the same
the rest of the engine spec is 750cc, Wossner 9:1 compression pistons,533 rod length, Dell Orto PHF36mm carbs, and XV 750 valves, with a really good valve seat cut, the ports are completely stock
A year later we added a 3.5 cam, more compression from 10:1 compression JE pistons and got 76hp on the same dyno ( we always use TTS for dyno work)
two years later we built an 880 which got us 93 hp
just thought it might interest some people, not many peeps dyno their work
the engine is one i built for Steve Mann CRMC sidecar racer, this is about 6 years old now, the lower trace is using a Megacycle 25-020 cam, the higher trace is a Smedspeed 2.5 cam, which is the same cam but with some computer smoothing and more valve overlap. the lift and duration are exactly the same
the rest of the engine spec is 750cc, Wossner 9:1 compression pistons,533 rod length, Dell Orto PHF36mm carbs, and XV 750 valves, with a really good valve seat cut, the ports are completely stock
A year later we added a 3.5 cam, more compression from 10:1 compression JE pistons and got 76hp on the same dyno ( we always use TTS for dyno work)
two years later we built an 880 which got us 93 hp
just thought it might interest some people, not many peeps dyno their work