Engine talk notes

[Norqy]

The following are some notes from the May 14th talk on engines.
Please help with any corrections or clarifications.

Put a fine screen on a Continental oil filter pickup. (Lycoming already uses fine screen).
Flush or replace oil coolers when overhauling an engine.
Carbon tracks can cause detonation.

Hollow carburetor floats can fill with fuel (can experience pressure that causes
Use solid epoxy floats on carbs.
Service Bulletin said all Blue Floats by 12/31/2008

Lycoming mystery failure. Could be new cylinder hold down bolts. 
Continental requires replacement on overhaul.  Lycoming doesn't.   
Dave says “torque once (use it once) than throw it away” (regarding these bolts).

Tuning the EMS for best power comes out to a little rich.

Embry Riddle runs their planes at full rich.  EMS saved them 19% and also gives 7 or 8 more hp.

Compression ratio doesn't give you that much more horse power.  Beware of performance claims.

Balance for the rpm that you run at.  Balancing for 8000 rpm is useless.

Porting, polishing, doesn't last long.  Because of build up of exhaust is different between cylinders.

Cyl. Temp:  keep below 400 deg.

Don't run “Lean of Peak!”   Run a little rich to cool the engine better.

G&N says to use straight weight, but if you want a multi-grade then use
Phillips 20-50, because it is ALL oil and will build up a varnish that will protect the engine better.

Lycoming price increases happen every October.  G&N can order ahead to avoid that increase.

Running it up to Temperature.   210 in the sump for half hour to get the moisture out of the oil.

Auto fuels will bubble and cause leaning the 106 def. F.

Hand turning an engine will wipe the oil off the parts and the oil pump won't turn fast enough to put new oil back on the parts.

!!! consider how to  pressurize the oil on the engine before starting it !!!