Other Aftermarket Electronic Fuel Injection

[I-MKLK]

Ernst,
Do you mind to eplain to me how those purge valves work?

[N427EF]

I'd Be glad to,its just a little awkward typing on the phone
Since I am away from home.
Purge valve is attached to the spider on top of the cylinders.
When opened it directs fuel back to the tank or a T in the fuel
Intake line somewhere between the tanks and the electric fuel pump.
On a hot engine you simply keep the purge valve open, turn the boost pump on
And purge hot fuel and vapor back to the tank.
It allows you to fill the entire fuel system up to the spider
With cool fuel and proceed with a normal start.
In addition when you open the purge valve to shut down the engine
And leave it open you will not have fuel percolating into the cylinders
And flood the engine while it is sitting on the ground,another
Contributing factor to difficult hot starts.
It basically acts as a second mixture cut off only better in that
It results in a abrupt and clean shut off.
There is an extra push pull cable required to actuate the valve
As well as a little extra plumbing but well worth the extra effort
And small expense.
I'll post some pics when I get home

[Mark33]

Originally Posted by I-MKLK

Hi all,

I'm pretty new in the forum, I'm coming from Italy and I just started an RV7 QB.
I'm through the diffucult engine choice process:
I'd like to have a 360/370 fuel injected but, due to the high fuel cost in Italy, I'll run on Mogas.All of the people installing a classic mechanical fuel injection and running on Mogas are experiencing very difficult hot start due to vapour lock.
I'm seriously thinking about installing the EFFI ignition and injection system.
Do you have any suggestion and report about the affordability of this system?
Am I right or not about that just few of the Vans community installed such kind of system?Except for the cost do you think is a good choice for my new engine?

Thanks

Hi Marco,
I'm installing the complete EFII system in my 7 build. I know there are not as many of these systems out there as there are other systems, but more and more are coming on line all the time and I really think this type of setup is the way of the future. It's very easy to install and it's MOGAS compatible. Robert, at EFII is great to work with and his customer service is top notch.

Mark
RV-7 getting closer all the time!

[I-MKLK]

Originally Posted by Mark33

Hi Marco,
I'm installing the complete EFII system in my 7 build. I know there are not as many of these systems out there as there are other systems, but more and more are coming on line all the time and I really think this type of setup is the way of the future. It's very easy to install and it's MOGAS compatible. Robert, at EFII is great to work with and his customer service is top notch.

Mark
RV-7 getting closer all the time!

Thank you Mark,

I also think that such kind of system should be the future even if a lot of people are skeptical about its reliability.
Did you choice the two batteries cinfiguration or two alternators or both of them?
I'm worry about incresing weight but considering also the use of electronic ignition the weight gain should be around 15lbs.

[Mark33]

Originally Posted by I-MKLK

Thank you Mark,

I also think that such kind of system should be the future even if a lot of people are skeptical about its reliability.
Did you choice the two batteries cinfiguration or two alternators or both of them?
I'm worry about incresing weight but considering also the use of electronic ignition the weight gain should be around 15lbs.

Yeah, it's understandable that some people would be skeptical about a system such as this....it's hard to change old traditional ways of thinking. There's nothing wrong with the old school way of doing things...it's proven itself well in its long history, but electronic fuel injection and ignition has also been around for a long time and has also proven itself well but it just hasn't matured quite enough in airplanes for a lot of people to be comfortable with it. I kind of think of it like the growing pains that the new all electronic EFIS systems went through compared to the old steam gauges. If you have enough redundancy built into your system, I think it's just as reliable as any other system. To answer your question though, I'm running both a two battery and two alternator setup. The EFII system is lighter than a traditional mag and carburetor setup, so you'll have some nice weight savings there. I think overall, by the time you add an extra battery and or an extra alternator, the overall weight will be close to the same.

[N427EF]

On the the engine side.



On the cockpit side.

[IMG][/IMG]

[I-MKLK]

Thank you Mark, thank you Ernst.

Now I just have to decide.....

The airflow performance/dual P-Mags could be a good alternative to EFII System.
Engine is choosen:aerosport IO-375 with WW 200RV

Thanks again