Thanks for the reply Tom. I highly value your opinion. BTW, on this install, I firesleeved ALL the lines based on your critique of my install on my last install.
To answer your question, yes I'm already using a different port. But, it's the bottom port on the sump and that doesn't allow the return oil to drain back to the sump as well as that upper forward port does. I suspect that is because the Raven Fitting standpipe still sits below the level of the oil in the sump. So, the canister doesn't empty as quickly and, when I string together a couple of inverted figures, I get some oil on the belly. That's the problem I'm trying to solve. Rob, at Raven, says the front port works much better. And, based on my experience on the previous airplane where we used the forward port, the canister did perform better.
Frankly, it just kinda irks me that anybody designed a bracket that closes off a sump port. I'm no engineer but I think I could design a bracket that left that port accessible! I'm thinking of modifying the top piece to bend over the fitting and using additional spacers to move the bottom fitting down. I don't think I'll have any issue with hoses as I won't have to change the fuel supply line and I know I can route the oil canister return line across the front of the engine. I also don't think I'll have to modify the linkage geometry much if at all. Again, it may all be too much work for little gain. I've only got a few hours on the inverted system and am still experimenting. Right now, I've dropped the oil level to 5 quarts and will see what, if any effect that has. Thanks again for your help!
Tampa (Wimauma), Florida
RV-4 N212CS (sold)
RV-8 N184RK (flying)
Flying an A320 to pay the bills
Exempt and gladly donating anyway - Current through Jan 2019