CorvAircraft> Fuel injection for Corvairs

[Dave Morris "BigD"]

Some data points for you from the certified world.  I've been 
examining this recently in the difference between similar airframes 
(in this case early Mooney models) and their Lycoming O-360 versus 
IO-360 engines:

Carb
1. If the carb is installed in such a way that it gets direct heat 
from the engine block, the ability for carb ice to form is so 
drastically reduced that the need for carb heat is virtually 
eliminated.  My CFI with 4000 hours in Mooneys instrumented his carb 
with a temp gauge for years, and told me not to use carb heat the way 
I would have in a C-172.

Fuel Injection
1. Several recent incidents of plugged injectors or spiders, causing 
INSTANT engine failure and dead-stick landings.  Doesn't happen in a 
carb system.  Some freezing of injector lines due to position in 
cooling air stream with resulting need for air deflection baffles.
2. Injectors can produce more consistent fuel/air mixtures across 
cylinders, resulting in an ability to lean past peak EGT and derive 
huge fuel savings and more power.

Dave Morris


At 10:26 AM 4/9/2007, you wrote:
>Gene,
>
>In my view, the biggest advantage to fuel injection is the saftey 
>aspect associated with not having to worry about carb ice.
>
>The disadvantages are increased weight and complexity.  Cost is a factor too.
>
>Right now I tend to favor the carb... but I would love to see 
>someone make a break through that would change my mind.
>
>
>
>
>eng1 at vzavenue.net wrote: Hi Folks,
>
>What are the expected advantages of EFI?
>
>I exchanged emails with someone at Simple Digital
>Systems and they told me that the engine would get
>HP and fuel economy benefits only if run at higher
>rpm by using a redrive.
>
>Thanks,
>
>Gene Weber
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