Peter R. wrote:
Matt Barrow wrote:

"Peter R." wrote in message
...
Matt Barrow wrote:

What % of power are you using? I'm usually around 360-370, but I'm
running
70-75%.

I also cruise around 75% of the IO-520's 285 hp.

What altitude? FF?

In summer temperatures at 12,000-15,000 feet I get about 187-190 kts TAS at
about 15 gph. In the winter, I see 175-180 kts TAS and 16.5 gph or so.

--
Peter

Unless the LOP "formulas" have changed (which IS entirely possible,
been a few years since I had to think/worry about it) anything much
over 14.5 GPH would be considered higher than 75% power.

285 HP x .75 = 213.75 HP / 14.9 HP/G = approx 14.3 GPH @ 75% operating
LOP

If your CHT's are closer to 300 F than 400 F running those settings,
you've got one of the "cooler" installations that I've ever heard of...

TC