PeteP
Well Known Member
I have an stock O320E3D in my 9A with 2.6 hrs SMOH and no test stand run in. It is swinging the Vans recommended Sensenich 70CM prop pitched at 77 inches. The engine is complete stock in terms of pistons, mags, carb and etc. Also the prop has a max RPM limit or 2600.
At this time, according to the Skyview with a Vans tach generator, it will only turn up 2450 RPM WOT in cruise at 5 or 6K altitude with good CHTs and EGTs and truing out at about 125 knots. I have not yet installed the wheel pants or gear leg fairings.
I am going to try to check the tach with an external tach to verify the Skyview accuracy this weekend. I found the Sensenich specs on the prop and they call for a minimum static RPM of 2100 - 2250 RPMs which I am pretty sure I am making but will check again.
Could this be an engine break-in issue or an over pitched prop issue? .
At this time, according to the Skyview with a Vans tach generator, it will only turn up 2450 RPM WOT in cruise at 5 or 6K altitude with good CHTs and EGTs and truing out at about 125 knots. I have not yet installed the wheel pants or gear leg fairings.
I am going to try to check the tach with an external tach to verify the Skyview accuracy this weekend. I found the Sensenich specs on the prop and they call for a minimum static RPM of 2100 - 2250 RPMs which I am pretty sure I am making but will check again.
Could this be an engine break-in issue or an over pitched prop issue? .
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