915 iS boost pressure?

by Andrew Morris in 915iS Technical Questions 7 years ago

Does anybody know how much boost this engine can take expressed in pounds per square inch? Just curious, thanks.

Re: 915 iS boost pressure?

by Bill Hertzel » 7 years ago

Bill Hertzel

13 1.95k 8k

The Max pressure specified in the Operators manual is 51"hg of Manifold Pressure.
That would be 25 psi Absolute measured against a perfect Vacuum.

Depending on how you define "Boost"...
It would be 10 psi above atmospheric pressure at Sea Level.
And 15 psi at 10,000 Ft.

Bill Hertzel
Rotax 912is
North Ridgeville, OH, USA
Clicking the "Thank You" is Always Appreciated by Everyone.

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Re: 915 iS boost pressure?

by Andrew Morris » 7 years ago

Andrew Morris

5 21 72

Thank you so much Bill! Now I have more rabbit holes to go down and learn about. :)

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Re: 915 iS boost pressure?

by Scott Schafer » 5 years ago

Scott Schafer

2 7 27

My fuel pressure continues to exceed 51 PSI up to 54 and stays there for a prolonged time. Happens with one and/or two pumps on in high and medium power flight.

is there a way to make a regulator adjustment?

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