turbo

[steve traynor]

has a turbo ever been tried to force cooling air through the centre of engine?

[graham]

There is a problemTurbochargers needs a reliable oil supply at pressure. First job is to design a sump and a high pressure pump, then a feed and return to and from the turbo. On overrun, turbo speed can rise to 200000 rpm. Working speed can be 100000 so the bearing always need a good oil feed. Water cooling of the bearing housing is often required too. Why not keep it simple with an exhaust ejector. They don't have to be noisy.Graham.

[steve traynor]

mine is! didnt think of turbos needs just thought it might provide fan cooling to engine core, cheers graham

[Richard Negus]

......... one of the little beauties I've just added to the Gallery !Driven by toothed belt from a pulley fixed on the O D of the generator rotor at about a 7 : 1 ratio and the outlet ducted to the normal air inlets.Outlet from the centre plate ducted to a muff around the silencer to disperse the smoke.Then decent carburettors and run on 100:1 fuel/oil mix (or a four outlet oil pump) to lubricate the apex seals.Result ? Street legal noise is possible with a useful increase in power or, alternatively, a bit more noise and a lot more power.Seemples!R.Not that I'm encouraging anyone to use a noisy, smoky, bike on public roads, you understand ........