Terry Syd
Addicted to ArboristSite
I did some calculations on the width of the intake plus the two strato port windows (transfer port window width) to see what the combined intake and strato ports gave as a percentage of bore diameter. I knew that the intake and strato ports together would be a good size gulp, but I wasn't ready for the actual number.
The 450 has a piston diameter of 44mm. The intake port is 15mm and the two transfer ports (strato intake) have a combined width of 27mm.
The combined width of the intake and strato ports is 42mm.
That gives a total intake cycle opening of 95% of bore!
Not only is it 95% of bore, but the openings are flat, there is no curvature to the opening like a conventional two-stroke.
Don't even worry about the small size of an intake on a strato, with the combination of the strato intake these engines can gulp air a lot quicker than any conventional two-stroke. As such, the strato should also be able to use less intake timing than a conventional two-stroke.
Now that I have run the numbers, I can see that a strato has more potential for power than a conventional two-stroke.
The 450 has a piston diameter of 44mm. The intake port is 15mm and the two transfer ports (strato intake) have a combined width of 27mm.
The combined width of the intake and strato ports is 42mm.
That gives a total intake cycle opening of 95% of bore!
Not only is it 95% of bore, but the openings are flat, there is no curvature to the opening like a conventional two-stroke.
Don't even worry about the small size of an intake on a strato, with the combination of the strato intake these engines can gulp air a lot quicker than any conventional two-stroke. As such, the strato should also be able to use less intake timing than a conventional two-stroke.
Now that I have run the numbers, I can see that a strato has more potential for power than a conventional two-stroke.