dean.psiropoulos(at)veriz
Guest
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 Posted: Sun Dec 04, 2011 6:31 pm Post subject: Aux pump Circuit |
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Excuse me for jumping in here Fred but...given your comments I've summarized
below...ARE YOU KIDDING ME? YOU HAVE THESE KNOWN ISSUES AND YOU CONTINUE TO
USE AUTOGAS??!! Is it because 100LL is not available where you are or you
just want to save money? I like to save money too but I wouldn't bet my
life on it! How about forgetting about the auto boost pump circuit and
running 100LL, especially in the SUMMER?
If you absolutely HAVE to have some autogas in the tank, how about running a
mix of 100LL and autogas? I'm no expert so don't do this without consulting
a chemist who knows about petroleum formulations. Maybe there is a
moderating effect of mixing autogas with 100LL that will increase the vapor
pressure sufficiently to avoid the vapor lock and still allow a percentage
of autogas that makes the cost per hour a bit less of a bite on the wallet.
Again, I'm not the expert so experiment with this at your own risk.
Better yet, just get the 100LL, I'd hate to see our fellow RVers have to do
a missing man formation for you.
Dean
RV-6A N197DM
Flying, 3+ years
-------------Original message ----------
From: "Fred Stucklen" <wstucklen1(at)cox.net>
Subject: Re: Auto Aux Fuel Pump Circuit Idea
... other Vapor lock issues if the pump is left ON with the fuel just
circulating within the pump (causing the fuel to heat up and vaporize).
..in excessively hot weather on the ramp while idling with the pump ON, can
vapor lock, causing the engine to stall, and a VERY difficult restart.
I have also seen situations while using Autogas on hot days where the
same issue exists in the air. ....engine stumbles because of the low fuel
pressure
(I have the ES Airflow Fuel Pump kit on the IO-360 RV-7A. Because of
its ability to cause vapor lock, I use it very judiciously.)
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