75% power at 10500 density altitude?

[BillL]

The FAA sponsored some testing with 100L and other fuels for detonation limits.

Here is a link for searching. http://f10011.eos-intl.net/F10011/OP...pleSearch.aspx

I think it should work. Let me know if it does not.

There are some good test reports in there. They use 100L as the baseline and several different engines. Some high compression and even turbocharged. I think a 320 is in there somewhere too. I think there are 6 reports when searching for detonation. Note the temperatures of heads, inlet air and note that the cooling airflow is extremely low measured as delta-p across the engine. I downloaded the reports for later study but it does show detonation comes on pretty quickly at some settings.

Detonation is more going to be a function of BMEP than % power. It is calculated in the better written papers.

[glenn654]

At 10k + altitude your fuel flow seems to be high even at full throttle.

You may need to recheck your K factor for fuel flow, if its off that would affect the indicated %power.

Glenn Wilkinson