Kawasaki Sportsbike Riders Club - Australia - Online Forum

I'm guessing the limit to boost may be the crank seals???? Reversed cylinders. Guess it would fly?

Put some work into it and FMD Wouldn't she scream

bizarre. I don't know how that could possibly work.

Gosling1 wrote::shock: bizarre. I don't know how that could possibly work.

if it actually does.... the turbo lag would be awful.

open the throttle and maybe tomorrow, next month the thing would start to accelerate ... quickly.
In the meantime... grass would grow.

No way! The timing of the ports in the cylinder means that the exhaust port is open way after the intake port closes. This means that there will be no pre-compression of the intake charge, even when the blower is boosting.

Might make a smidge more power because of blown scavenging, but the benefit will be marginal, if any, and the fuel consumption would be monsterous.

(-8

BrettZZR wrote:No way! The timing of the ports in the cylinder means that the exhaust port is open way after the intake port closes. This means that there will be no pre-compression of the intake charge, even when the blower is boosting.

Might make a smidge more power because of blown scavenging, but the benefit will be marginal, if any, and the fuel consumption would be monsterous.

(-8

I agree. I would imagine the turbo might give you a tiny bit of back pressure, but no where near enough for it to work. The turboed two strokes that I have seen on the net that look like they work, all had expansion chambers before the turbo so they still created the back pressure for the exhaust port.

The only two-strokes that can work with boost are those large two-stroke diesels, they are often turbo and supercharged, (think ships, large minimg equipment and huge gen-sets). These can work on boost because they have four valves in the head (ALL exhaust valves) that are timed to be closed when the pressure charge is flowing in...

It's a fundamental problem.

(-8

Hmmm Leminz