Bob_Belville Posted June 4, 2014 Report Posted June 4, 2014 12.5 gph is at 65%. That is the power i use most of the time. LoP doesn't really work on my plane at 20 degrees BTC. Different engine of course but I wonder about the timing comment. My IO360 runs fine LOP @ 20o BTC.
jetdriven Posted June 5, 2014 Report Posted June 5, 2014 Different engine of course but I wonder about the timing comment. My IO360 runs fine LOP @ 20o BTC. How much speed do you lose from 50 ROP to 20-25 LOP?
Bob_Belville Posted June 5, 2014 Report Posted June 5, 2014 Byron, here's what I posted a few weeks ago. It would not be 50 ROP but 100. LOP would be at least 20 deg on the richest cyl. This was an actual test flight checking out "rebuilt" engine. 158k @ 70% ROP @ 10.3 GPH or 146k on 8.2 GPH LOP with really cool oil and CHTs! The 12 k +/- seems to be consistent with other checks.
Bob_Belville Posted June 5, 2014 Report Posted June 5, 2014 Byron, here's what I posted a few weeks ago. It would not be 50 ROP but 100. LOP would be at least 20 deg on the richest cyl. This was an actual test flight checking out "rebuilt" engine. 158k @ 70% ROP @ 10.3 GPH or 146k on 8.2 GPH LOP with really cool oil and CHTs! The 12 k +/- seems to be consistent with other checks. Ignoring extra burn in climb and winds aloft, the above MPG means 100 nm greater range on 42 gallons (52 usable minus 10 gal reserve) running LOP 748 vs.644 nm. For my frequent NC-MA trips LOP might be the difference re a fuel stop.
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