VAF Forums

VAF Forums (https://vansairforce.net/community/index.php)
-   Electronic Ignition Systems (https://vansairforce.net/community/forumdisplay.php?f=103)
-   -   Electronic ignition and fuel systems (poll) (https://vansairforce.net/community/showthread.php?t=152123)

humptybump 08-07-2017 07:14 AM

Electronic ignition and fuel systems (poll)
 
I've always been curious about the different combinations of fuel and ignition choices builder / owners make with their airplanes.

RV6_flyer 08-07-2017 07:23 AM

Quote:

Originally Posted by humptybump (Post 1193895)
I've always been curious about the different combinations of fuel and ignition choices builder / owners make with their airplanes.

One thing left off the poll would be dual electronic ignition and dual mags.

The LASAR and G3i systems are both dual electronic with dual mag backup.

Toobuilder 08-07-2017 07:40 AM

Another choice which is gaining momentum is dual EFI and EI, such as the SDS system I'm installing.

As a fallback choice, my last 3 airplanes have been injected (Bendix) and dual EI.

humptybump 08-08-2017 04:00 AM

Interesting results thus far with 45 respondents.

rmartingt 08-08-2017 04:16 AM

My choice is "other" - - full electronic fuel injection and ignition. (SDS).

humptybump 08-09-2017 10:40 AM

The sample set is not very big (81 data points at present) but the "trend over time" has been interesting to watch.

The general trend of responses has been 2:1 in favor of fuel injection vs carburetor. On the carburetor side, the responses have trended 2:1 in favor of a single EI while on the fuel injection side it has trended 2:1 in favor of dual EI.

Canadian_JOY 08-09-2017 11:29 AM

A comment on your trend observations, Glen... It's been my observation that some of those who tend to operate from "less improved" airstrips and over less populated land often do their systems planning with independence in mind. The carb guys (I'm one) keep a mag because the combination of carb and impulse-coupled mag means one has the ability to get started while out in the boonies, long after some idiot left the master switch on and made hand propping a necessity. I've gone one step further by installing a manual priming system, again to avoid any dependence on the flow of electrons.

AttackPilot64 08-09-2017 11:54 AM

Poll
 
Dual EMAG PMAG with Fuel Injected engine plus GAMMI injectors = one smooth fuel efficient machine!

Bevan 08-09-2017 12:05 PM

Quote:

Originally Posted by Canadian_JOY (Post 1194692)
A comment on your trend observations, Glen... It's been my observation that some of those who tend to operate from "less improved" airstrips and over less populated land often do their systems planning with independence in mind. The carb guys (I'm one) keep a mag because the combination of carb and impulse-coupled mag means one has the ability to get started while out in the boonies, long after some idiot left the master switch on and made hand propping a necessity. I've gone one step further by installing a manual priming system, again to avoid any dependence on the flow of electrons.

That's cool. I would like to know more about how you accomplished manual priming.

Bevan

humptybump 08-10-2017 05:51 AM

Quote:

Originally Posted by Canadian_JOY (Post 1194692)
A comment on your trend observations ...

I don't think I'd ever be able to Devine the "why" in the data. With such a small sampling - currently a little over 100 out of thousands - there are definitely too many variables to make many scientific observations.

I also think there is a case for the "observer effect". While the poll is not quantum physics, the fact I commented about observed trends has changed those trends. :cool:

Currently, fuel injection is almost 3:1 compared to carburetors. The fuel injection responses have surged. The carburetor data is still trending 2:1 in favor of a single electronic ignition while fuel injected installations are narrowing a bit to 1.7:1 while still favoring fuel electronic ignition.

humptybump 08-11-2017 06:50 PM

With a little over 120 results it's 8:5 in favor of fuel injection. The splits are still mirrored with carburetors going 7:4 in favor of a single EI and the injection crowd going 4:7

I want to interview for a job as a Vegas bookie.

622BH 08-12-2017 07:25 AM

EFII
 
I agree with the respondents who have no option to vote for EFII systems.

49clipper 08-12-2017 08:31 AM

49clipper
 
One electronic ignition and mag, and carbed.

humptybump 08-12-2017 11:04 AM

Quote:

Originally Posted by 622BH (Post 1195479)
I agree with the respondents who have no option to vote for EFII systems.

To avoid all possible permutations from each vendor, the survey choices were generalized.

Based on the website - "EFII stands for electronic fuel injection and ignition", it aligns well with the other solutions providing "fuel injection" and "two electronic ignition".

Toobuilder 08-12-2017 12:07 PM

In that case, my vote remains unchanged. That said, the difference between the mechanical injection systems and the ECU driven, high pressure electronic systems is at least as compelling as the difference between the former and a carb. But it is your poll and I dont know what your end result needs to look like.

rvator51 08-12-2017 01:25 PM

Surprising to see how few are running magnetos. I thought it would be higher.

Brantel 08-12-2017 01:42 PM

I should have waited to vote. I will soon have 2 electronic ignitions!

humptybump 08-12-2017 02:53 PM

Quote:

Originally Posted by Brantel (Post 1195574)
I should have waited to vote. I will soon have 2 electronic ignitions!

Congratulations :)

humptybump 08-12-2017 02:54 PM

Quote:

Originally Posted by rvator51 (Post 1195570)
Surprising to see how few are running magnetos. I thought it would be higher.

I think the poll is somewhat "self selective" since it's title focuses on combinations with electronic ignition.

Ironflight 08-12-2017 03:54 PM

Let's see, its a little hard to address the poll, since we have different configurations on different planes - you can sort it out Glen!

Two planes with dual P-Mags and fuel injection (one Bendix, one Airflow Performance)

One plane with Slicks and a carb

One plane with dual P-Mags and a Carb

And there there is the work in progress that will have an Aerovee and whatever ignition and induction system that goes with that.... ;)

Paul

humptybump 08-12-2017 06:58 PM

I've got to give this a try ...

Quote:

Originally Posted by Ironflight (Post 1195604)
Two planes with dual P-Mags and fuel injection (one Bendix, one Airflow Performance). One plane with Slicks and a carb. One plane with dual P-Mags and a Carb.

RV-8 - Slicks and a carburetor
RV-6 - pMags and a carburetor
RV-3B - pMags and fuel injection
Tundra - pMags and fuel injection

It's a tough call on the assignments. The RV-3B is pretty certain but the Valkyrie has been around a while and Mikey has had numerous upgrades. :)

David Paule 08-12-2017 07:15 PM

I went with 2 Pmags and a carb for my RV-3B. I chose the Pmags for ease of starting and efficient fuel burn.

My engine was delivered with a carb, and since I'm not planning on acro and don't plan to do inverted flight, that let me eliminate the inverted system and the fuel tank flop tube. On my certified plane, I've got an ARP carb ice detector and it finds ice in real time, so carb ice is not an issue. It's easily identified and controlled, and I have one for the RV-3B. Spruce sells them if that's a concern for you.

At my location, much of my flying is full throttle and leave it there until I descend for landing. Carbs aren't that bad at full throttle, I've read.

There you have it.

Dave

Ironflight 08-12-2017 08:42 PM

Quote:

Originally Posted by humptybump (Post 1195652)
I've got to give this a try ...



RV-8 - Slicks and a carburetor
RV-6 - pMags and a carburetor
RV-3B - pMags and fuel injection
Tundra - pMags and fuel injection

It's a tough call on the assignments. The RV-3B is pretty certain but the Valkyrie has been around a while and Mikey has had numerous upgrades. :)

Close - you've got the six and eight reversed. Mikey is totally old school!

humptybump 08-13-2017 10:01 AM

There's been a surge in polling data (161 results) from fuel injection 5:2 over carburetor. The carburetor install with single EI are 4:3 while the fuel injection installs are back up to 2:1 in favor of dual EI.

humptybump 08-15-2017 07:12 AM

The poll has settled down (for the most part). I'd like to say "thanks" to everyone for participating and for the comments.

As of now, with 170 data points, it's 5:2 with fuel injection results more than double that of carburetor. The carburetor results are 6:5 with the single EI reporting ahead. The fuel injection results continue to hold at 2:1 in favor of dual EI.

Rbpilot 09-05-2017 02:06 PM

I have replaced mags on my 0-290 with dual ignition (EFII). Injection to come later. Looks like FLYEFII has some new stuff out.


All times are GMT -6. The time now is 08:54 AM.