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01-11-2010, 08:46 PM
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Join Date: Oct 2009
Location: Uberaba, MG, Brazil
Posts: 122
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Fuel injected or not?
Hi
I am plannig on the engine for a RV10 and have been talking to a couple of friends that are argueing that I would be better off with a carburated engine (O-540) instead of the fuel injected option (IO). They argued that The carburated would be more fuel efficient and much better to start when hot (that is very hard to start a hot fuel injected io540) and so on. Considering I live in Brazil and fly mostly down here (tropical weather), what would be my best shot?
Thank you
Moura
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01-11-2010, 09:59 PM
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Join Date: Oct 2005
Location: Vancouver, WA USA
Posts: 908
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Don?t listen to them, they have obviously not used a FI engine before and there full of BS, Given the choice I would never chose a carb over FI.
Fuel economy will be better with the FI even if it?s only balanced average, balance it well and you get the idea.
They all have there reluctance to start hot, carb or FI, either way you will find the sweet method to get it started.
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01-11-2010, 11:26 PM
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Join Date: Aug 2006
Location: santa barbara, CA
Posts: 1,681
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FI is the way to go. Read up on the benefits of running lean of peak and that is reason enough. Hot start is just not that big of a deal - its all in the technique.
erich
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01-12-2010, 01:22 AM
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Join Date: May 2008
Location: Houston, Alaska
Posts: 292
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If the support is all the same then get FI as you will get better fuel economy, but if your able to get carb parts much easier then that may be a factor.
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01-12-2010, 10:14 AM
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Join Date: Jan 2005
Location: Sherwood, Oregon
Posts: 981
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I went thru this same fear factor from friends who had never flown FI, discounted same and have been flying with injection going on 3 years. I would NEVER want to go back to carb.
Cheers,
__________________
Jerry Cochran
Sherwood, Oregon
RV-7a 707DD Bot from David Domeier 12/01/11
Lycoming IO-360 Catto 3 blade Panel upgrade in progress
RV6a 18XP 1st flite 03/21/07 sold to Dale Walter 10/22/2011
Superior IO-360, Hartzell Blended, GRT/Dynon
Happily "autopaying" DR
"Suppose you were an idiot, and suppose you were a member of Congress; but I repeat myself."
Mark Twain
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01-12-2010, 10:52 AM
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Join Date: Oct 2009
Location: Uberaba, MG, Brazil
Posts: 122
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WOW, you guys are fast. Well, so far I have not seen any advantages of the carburated over the injected, except that it masy be easier to get parts for it. Are there any other advantages of carb over FI? Do you guys users of FI have any trouble hot starting your engines? What are the methods used for hot starting a IO540?
What about troubles, we know sometimes (perhaps quite often) in aviation the simpler the better and we know carbs are very simple and proven design. FI users are facing or have faced any kind of troubles with your IOs?
Sorry to insist but I am trying to understand the advantages and disadvantages of each option because once the option is make, it will be to late to change the mind. So far FI are way ahead, lol.
Thank you
Moura
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01-12-2010, 11:09 AM
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Join Date: Jun 2006
Location: Delaware, OH (KDLZ)
Posts: 4,194
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Quote:
Originally Posted by Moura
Do you guys users of FI have any trouble hot starting your engines? What are the methods used for hot starting a IO540?
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If you use a purge valve, the hot fuel is pumped back in to the tank and cold fuel is used to start. |
01-12-2010, 11:57 AM
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Join Date: Mar 2005
Location: Dallas area
Posts: 10,762
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It's very similar to the F/P vs. C/S argument. Both have advantages and disadvantages. Carb is cheaper, easier "hot" starting, and runs with much less fuel pressure. FI has better distribution, very low risk of induction icing, allows for inverted operations (so long as you have inverted oil and fuel pick-ups), and slightly better operating economy.
__________________
Mel Asberry, DAR since the last century.
EAA Flight Advisor/Tech Counselor, Friend of the RV-1
Recipient of Tony Bingelis Award and Wright Brothers Master Pilot Award
USAF Vet, High School E-LSA Project Mentor.
RV-6 Flying since 1993 (sold)
<rvmel(at)icloud.com>
Last edited by Mel : 01-12-2010 at 12:00 PM.
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01-12-2010, 12:01 PM
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Join Date: Jan 2005
Location: The Beautiful NJ Shore
Posts: 409
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No one mentioned that you cannot get 'carb ice' with an FI system. Carb ice can form even in tropical climates.
__________________
Greg Piney
RV-8 2547
Empennage Done!
Beginning Fuselage Final Assembly!
(Tub finished, on to Landing Gear).
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01-12-2010, 12:08 PM
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Join Date: Mar 2005
Location: Dallas area
Posts: 10,762
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Quote:
Originally Posted by gpiney
No one mentioned that you cannot get 'carb ice' with an FI system. Carb ice can form even in tropical climates.
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CAUTION! Induction icing is still possible with fuel injection even though it is extremely rare.
__________________
Mel Asberry, DAR since the last century.
EAA Flight Advisor/Tech Counselor, Friend of the RV-1
Recipient of Tony Bingelis Award and Wright Brothers Master Pilot Award
USAF Vet, High School E-LSA Project Mentor.
RV-6 Flying since 1993 (sold)
<rvmel(at)icloud.com>
Last edited by Mel : 01-12-2010 at 12:19 PM.
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