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  #21  
Old 04-24-2015, 08:35 PM
Charles in SC Charles in SC is offline
 
Join Date: Aug 2006
Posts: 703
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For me FI is the only way to go. Over the years it seems to me that vibration is hard on carbs. In old carbs the shafts and moving parts always become ill fitting.
You do not have to worry about carb ice and the fuel distribution is much better.
A carb is ok on my lawn mower but I do not want one on my plane.
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  #22  
Old 04-24-2015, 08:52 PM
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N941WR N941WR is offline
 
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Location: SC
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Quote:
Originally Posted by hoyden View Post
I've been flying my IO-360 FI RV6 since 2001 and thoroughly enjoy flying with FI. Flying LOP at 5 gph is a leisurely way to enjoy the local scenery. Recently I replace a magneto and Lightspeed with two P-Mags. On my first flight I leaned to 4.4 gph. I dub the setting Rotax mode.
I have a carb on my O-360 with dual P-mags and can easily fly LoP.

My typical flight is at 8500 to 11500 feet, 150 to 155 TAS and less than 7 GPH LoP.

Here is a picture of an extreme non-stop flight from Houston, TX to Greenville, SC.


I have one photo showing me running 141 KTAS while burning 3.1 GPH LOP.

It is the dual P-mags that make this happen.

With 650 hours on my FP carbureted -9, I would put the money into fuel injection before I bought a CS prop.
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RV-9 (Yes, it's a dragon tail)
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  #23  
Old 04-25-2015, 04:07 PM
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s10sakota s10sakota is offline
 
Join Date: Feb 2005
Location: Westland, MI
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(Dumb Question Alert)

Do the fuel injection engines NOT have the lower cowl scoop? I like the scoop and WANT the scoop!

I see -8's and -7's without the air intake scoop on the bottom cowl, and I always thought those were the fuel injected ones. Am I correct?
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  #24  
Old 04-25-2015, 04:30 PM
terrye terrye is offline
 
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Location: Vancouver, BC, Canada
Posts: 860
Default Both

Fuel injection servos can be mounted vertically (with the lower cowl scoop) or horizontally (with the duct or snorkel inside the cowling with the filter in the pilot's side cooling air inlet) depending on which sump you specify.
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  #25  
Old 04-25-2015, 08:36 PM
BillL BillL is offline
 
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Location: Central IL
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Quote:
Originally Posted by terrye View Post
Fuel injection servos can be mounted vertically (with the lower cowl scoop) or horizontally (with the duct or snorkel inside the cowling with the filter in the pilot's side cooling air inlet) depending on which sump you specify.
I have the horizontal servo and will be using the scoop for combustion air.

I like the scoop too.
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  #26  
Old 04-26-2015, 04:54 AM
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s10sakota s10sakota is offline
 
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Location: Westland, MI
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When I ordered my finish kit (same time as fuse kit) I bought the cowl with the scoop as I planned on using the carb because I wanted simple and inexpensive. Now that I've read through this thread, I'm seriously thinking of going FI.

At least I can still use the same cowl!
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1962 Piper Cherokee 160
2003 RANS S-10
2011 RANS S-6S
2011 Vans RV-7
2015 Zenith Cruzer
1962 Mooney M20C
2019 KITFOX Super Sport
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  #27  
Old 04-26-2015, 06:04 AM
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Mel Mel is offline
 
Join Date: Mar 2005
Location: Dallas area
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Quote:
Originally Posted by s10sakota View Post
When I ordered my finish kit (same time as fuse kit) I bought the cowl with the scoop as I planned on using the carb because I wanted simple and inexpensive. Now that I've read through this thread, I'm seriously thinking of going FI.
At least I can still use the same cowl!
Don't let these guys "scare" you into changing your life. While FI is great, a good carb system works great also. RVs and Lycomings have been flying for many, many years with carburetors. Mine has been flying since 1993 and my CHT run very evenly. I can run LOP. Lycomings and particularly RVs with Lycomings are not commonly prone to carb ice.
If you want to change over to FI, that's fine. But do a little more research before you make that big investment.
As you say, carbs are simple and inexpensive and run with very low fuel pressure.
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RV-6 Flying since 1993 (sold)
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Last edited by Mel : 04-26-2015 at 08:58 AM.
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  #28  
Old 04-26-2015, 08:08 AM
N427EF N427EF is offline
 
Join Date: Oct 2005
Posts: 1,516
Default FI

One more reason to consider FI
FI is your friend if you plan on running mogas.
You can certainly run mogas with a carbed engine but having your fuel system pressurized to 25 psi (typ for FI) lowers the likely hood of developing vapor lock in your fuel system.
AFPs FI is approved for all types of gasoline including pure ethanol.
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