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HelicopterGasser Model RC HelicoptersEngines › Fuel Injection now available?
03-08-2016 05:21 AM  19 months agoPost 21
SKYBORNE

rrNovice

Ottawa

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OK,

I'm learning that this is much more complicated than I originally thought. Sounds like this would be a custom job.

I was looking at this: http://www.ecotrons.com/products/2_..._injection_kit/

In the pipe, 5X5.

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03-08-2016 01:58 PM  19 months agoPost 22
Chris Bergen

rrElite Veteran

cassopolis, MI USA

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That's the system we've installed on our Twin, with the 28mm throttle body.

It would be too large, in TB and injector, for the 26cc single cylinder.

Chris D. Bergen

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03-11-2016 04:33 PM  19 months agoPost 23
jharkin

rrApprentice

Holliston, MA - USA

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We might yet get EFI hobby engines. DA has done it for industrial and government drones for many years and they just put up on their Facebook page they are testing one for the hobby market

http://www.flyinggiants.com/forums/...ad.php?t=194163

Watch at YouTube

Cheaper than the 5 figures they charge the Feds but still very expensive and a lot of extra heavy hardware to shove onto a small heli frame. Interesting nonetheless.

-Jeremy
Whiplash-G
Helix 700G
T-Rex 450 fbl conversion
alot of planks

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04-16-2016 04:31 AM  18 months agoPost 24
Chris Bergen

rrElite Veteran

cassopolis, MI USA

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As an update...

I've ordered the newest EFI system from ecotrons for 2 birds we're building on contract. While discussing the order and what we're using the system on, they mentioned they NOW have a 14mm throttle body!

I think with the larger single cylinder (big block) engines of 29cc, this 14mm TB will probably work just fine.

This newer system is $1600 so you'll REALLY have to want it or need it, but it appears that your wishes are coming true...

Chris D. Bergen

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04-16-2016 02:38 PM  18 months agoPost 25
RM3

rrElite Veteran

Killeen, Texas - USA

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I think I would rather tune every once in a while than to pay $1600...

That is really cool that they now have a small enough carb to work on a sub 30cc engine...most high performance carbs used in High rpm RC boat engines use Walbros that have 13.5mm bodies... I have one running in a highly modded 22cc and it works very well.

Now if they could just get the price down by another 70-85%...

showing a preference will only get you into trouble, 90% of everything is crap...

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05-01-2016 12:45 AM  18 months agoPost 26
Chris Bergen

rrElite Veteran

cassopolis, MI USA

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Some pics of the new system...

Chris D. Bergen

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05-01-2016 02:31 AM  18 months agoPost 27
ICUR1-2

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Ottawa, Ontario

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just something I saw

How much does the efi set up weigh?

spending time, paying attention

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05-01-2016 03:07 AM  18 months agoPost 28
Chris Bergen

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cassopolis, MI USA

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I haven't weighed it yet. In addition to the system, you'll need a battery to power the fuel pump and ECU.

I'll also be parsing down the harness, as I did with the first system, and eliminating some unnecessary items, such as the Econ switch. So the weight of the complete system will vary slightly from what I'll have on the heli.

I'll throw it on the scales and see what we get.

Of course, on our Twin, I'm not that concerned with the weight vs the benefits gained for this application.

Edit, I've already fixed the ball link... Not sure I'll be using their servo setup, though it is very nice. Unfortunately it's not a HV servo and we'll be running a 2 cell lipo for onboard power...

Chris D. Bergen

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05-01-2016 03:10 AM  18 months agoPost 29
Gearhead

rrMaster

Vt

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like the song says "we got a long way to go"

Jim
Buzz Buzz Buzz

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05-01-2016 03:17 AM  18 months agoPost 30
Chris Bergen

rrElite Veteran

cassopolis, MI USA

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True, but 6 months ago we didn't have a TB that would work with the single 26cc engines, now we do.

I call that pretty quick progress....

Chris D. Bergen

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05-01-2016 03:25 AM  18 months agoPost 31
Gearhead

rrMaster

Vt

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well that's because no one did the work, the technology was there years ago

Jim
Buzz Buzz Buzz

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05-01-2016 03:30 AM  18 months agoPost 32
ICUR1-2

rrElite Veteran

Ottawa, Ontario

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You need demand to produce as well as technology.
and then price has to be acceptable for the demand.

Glad to see it happening finally

spending time, paying attention

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05-01-2016 04:21 AM  18 months agoPost 33
Chris Bergen

rrElite Veteran

cassopolis, MI USA

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No one did the work? Is that like "you didn't build that"?

Chris D. Bergen

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05-01-2016 04:34 AM  18 months agoPost 34
Gearhead

rrMaster

Vt

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No one did the work? Is that like "you didn't build that"?
no , I'm saying the technology was there 15 years ago, maybe longer, but no one used that technology for a small 2 stroke till now

Jim
Buzz Buzz Buzz

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05-01-2016 06:00 AM  18 months agoPost 35
RM3

rrElite Veteran

Killeen, Texas - USA

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no one used that technology for a small 2 stroke till now
well considering that our small 2strokes run at pretty much a set RPM range, we tune accordingly to that...so really, EFI is a luxury and really does not benefit us much unless we are constantly changing RPM band, constantly changing elevation and temps due to location...I can see where it would benefit an industrial rig where this tends to happen and you just need to get it running now (time is money) and need the most fuel efficiency.

but for weekend hobbyists...thin market considering the cost, complexity and additional weight.

showing a preference will only get you into trouble, 90% of everything is crap...

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05-01-2016 06:42 AM  18 months agoPost 36
Gearhead

rrMaster

Vt

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so really, EFI is a luxury
true, but if some one started working on an EFI Walbro 20 years ago for our heli engines the price would be much lower than it is today

a simple 3 needle Walbro carburetor would help today LOL

Jim
Buzz Buzz Buzz

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05-01-2016 12:32 PM  18 months agoPost 37
fastflyer20

rrKey Veteran

N. Tonawanda, NY

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In any normal development cycle, once a few OEM's get interested for higher volume production, the price will come down.

When I was in the automotive industry, we would make transmission and power steering connectors for the OEM's, typically in prototype quantities of 10-20 the price would be $250 each . Once in production with high volumes and different equipment, the price would drop to between 50 cents and 75 cents. Think about how much time and development is behind the $10 sensor in a FBL system...

Tom
CAUTION - my posts are based on my experiences, yours may be different.

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05-01-2016 04:22 PM  18 months agoPost 38
RM3

rrElite Veteran

Killeen, Texas - USA

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Think about how much time and development is behind the $10 sensor in a FBL system...
very true...but there was ALOT of potential uses for it...besides our helis, ALL drones have them, phones now have them, cordless screwdrivers, kids toys, cars, tablets...

the market demand was very high for such a development, so the work was not focused on by one or two companies but rather a dozen or more all in hopes of getting in first.

this EFI (for 2 strokes) does not really have the same potential...so for the price to come down we need to see some sort of high volume demand, like that of lawn care equipment or the like...

but who is gonna care about a weedeater/leafblower/push lawnmower with EFI, for extra $? nearly all handheld 2stroke powered equipment runs within a specified RPM band...how would this EFI benefit them and still be cost effective over a traditional, simple two needle carb (or self adjusting carbs for that matter)?

showing a preference will only get you into trouble, 90% of everything is crap...

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