Evolution 62 EFI Fuel Injection
 

Did you guys see the new Evolution 62 EFI

Fuel injected, and no more mixture screws to mess with.....now even the electric poeple can handle a real engine ;)



Overview

Now there’s a Giant-Scale gas engine for those who don’t want the requirement of engine expertise. The Evolution® Engines 62GXi is a potent 62cc engine with the efficiency and convenience of an electronic fuel injection system. Simple to setup and maintain, it’s a Horizon Hobby innovation that means you never have to touch a needle-valve to enjoy starting ease, reliability and long engine life. That’s because SureFire™ Electronic Fuel Injection (EFI) technology combines finely-tuned software and sophisticated sensors so the engine gets the perfect flow of fuel no matter where or what you fly.

The Evolution Engines 62GXi is the only purposely built RC engine on the market to feature an advanced electronic fuel injection system specially made for the needs of the giant-scale model pilot. There are no needle-valves to ever worry about because the SureFire EFI™ system provides smooth, reliable operation and optimum engine transition automatically, regardless of throttle position or atmospheric conditions. Just fuel, flip and fly.

Like all Evolution engines, the 62GXi is built to exact standards with high-quality materials, plus it comes ready to run with a compact 2-cell Li-Po compatible ignition and high-quality muffler. It’s the most advanced giant-scale gas power system you won’t have to touch except to fill the gas tank.


Specifications

• Type: 2-stroke gas/petrol airplane engine
• Displacement: 3.75 cu. in. (61.49 cc)
• Bore: 1.81 in (46.0mm)
• Stroke: 1.46 in (37.0mm)
• Cylinders: Single
• Total Weight: 66.6 oz (1888 g)
• Engine (Only) Weight: 53.8 oz (1525 g)
• Muffler Weight: 8.2 oz (233 g)
• Crankshaft Threads: 4-5mm prop bolts on 30mm diameter centers
• Benchmark Prop: Falcon 23 x 9 @ 7300 rpm
• Prop Range: 22 x 8 - 24 x 10
• RPM Range: 1,000-8,000
• Fuel: 87 octane and above, synthetic oil at 32:1 ratio
• Muffler Type: Inverted wraparound (included)
• Cylinder Type: Ringed
• Carb Type: Electronic fuel injection

Features:

• SureFire™ EFI electronic fuel injection system
• Electronic ignition system with 7.4V Li-Po battery compatibility
• Purpose built engine for giant-scale model aircraft
• High-quality materials and lightweight design
• Shares the overall dimensions and mounting pattern of other popular engines in its class
• Common muffler mount fits a variety of available exhaust systems
• Dual ball-bearing equipped, cantilevered crankshaft
• Common 4-bolt propeller mounting pattern
• Built-in crankcase support means only short (50mm) stand-offs are required
• High-quality CM-6 spark plug included

What does it cost?

As to what I have read so far:

List price, $580, due out in April.

WOW! Wonder how well an EFI that small works? And looking at the pics it looks to have no electric plug in. How does it get its power?

This is the next generation, and will make all existing carb engines obsolete :-)

Will be interesting to see if that price will hold. Seems too low for all that technology.

I have learned to not buy the latest and greatest until it has time on the market to eliminate the unforseen issues. I hate being the Guinea Pig.

don't count your chickens before they hatch.:D

This is not the first time a EFI system has been tried, the first one didn't work out to hot ,lets hope these do better.

I think its pretty dang cool. However, I too will let someone else work out the bugs. Dirt bikes have been slow to adopt FI, it has taken a few years to get the bugs out, and to convince people it is better. After several years, many racers are still using carbs.


I would more willing to try it in my models because I like to tinker, and a failure isn't going to leave me stranded 100 miles from no where.

Looks like more of an electronic carburetor than true pressure/spray fuel injection, but that is not all bad if it does
what it says and eliminates engine adjusting.

Throttle body injection.

Where is the pump? Where is the ECU? What about the engine itself? Not made by MVVS so is this just a new Chinese produced engine like most of the newer Horizon / Evolution offerings. Not really being critical here but I'm certainly curious for some of the answers. One thing I can guarantee, I won't be one of the early adopters / Beta testers.

Found some more pics...

Yea, those pics have some wires going to the carb. I wonder about the 02 sensor, is there one?

Looks like Evolution is branching away from MVVS line...
I am guessing that the reason the price is low is because it is made in China with Tiwan injecters.....

As far as motorcoss racers using carbs? All of the 5-major manufactures use EFI...and will not be going back to Jets....

I am not sure about the 2-stroke KTMs that are still made, I am guessing they used carbs to keep the simplistic view....
That is the entire concept of buying a 2stroke now days (the ones that are being MADE yet)


Hey.... look QQ has a Inverza 60cc plane out!...... cool.

KC66 was riding a non-injected bike in Baja this year, as he did for his H&H bike which dominated. I give it 2 more years, and there will be more FI than carbs, but not right now.

Based on that trend, I give it 5 more years before we have reliable FI.

Motocross? I don't get motocross.

I'll answer some of the questions here.

1. O2 sensors dont work with oil in the fuel - they would last about 20 minutes so we don't have one.
2. Manufactured at a dedicated Evolution engine factory in China to a US design from our Evolution design team.
3. The Throttle Body Electronic Fuelnjection carb is US made with some overseas components.
4. It utilizes a single 2S LiPo to power the EFI and the Ignitions sytem which are wired together.
5. The electronics package os mounted riht on the throttle body and includes inlet air sensors, throttle position senssors, case temperature sensors and rpm sensors.
6. It works by using an algorithm that takes the rpm and throttle position to descide on the fuel needed.
7. The EFI automatically senses load changes and compensates for different props and exhaust systems.
8. Built in automatically controlled choke so the start is to simply flip the prop (4-6 times) and the engine starts and continues to run properly. The extra fuel for the choke will automatically stop after 10-30 seconds depending upon the starting temperature of the engine.
9. The engine mounts, prop mount and exhaust mounts match that of a DA60 so you can utilize already purchased components.
10. prop range for the engine is 22 x 10 through 24 x 10. The best prop we have tested so far has been a Falcon Carbon 23 x 9.

Pete

Thanks for the info Pete.

The EFI carb looks about the same size as a walbro unit.
Will it fit on, say the evoulution 58gx ?

It will but the programming is specifically for the new Evolution 62cc engine. For right now we will not be making this a ailable as a standa alone part.

Pete

Thanks for your comments.

The the engine is made to our specifications in China. The EFI is manufactured and programmed by our partners in the USA.

Pete

Wasn't the ME-109 fuel injected? And didn't it do so without O2 sensors and electronic controls?

Kudos to Horizon for having the initiative to come up with such a design. Given the number of threads on all the forums dealing with engine operation, eliminating tuning should be a popular step for many modelers.

There is a world of difference between mechanical Fuel Injection like the ME 109 had and Electronic Fuel Injection.
Mechanical injection does not have the need of an O2 sensor, Manifold Absolute Pressure sensor, Throttle position Sensor, Electronic Control Unit and so on.
While Mechanical is just that it utilizes a high pressure pump and injectors set to pop at a certain time and pressure
Granted the electronic is far more fuel efficient but we all got by with the Mechanical for years and years.

Anyway back to the engine at hand here, W/O and O2 sensor or ECU I can't see how it can operate properly. The early Holley Projection unit's didn't have an O2 sensor and the ECU got lost constantly it was a Major PITA to deal with.
I'll let someone else try this out for now and see how well it does work, Besides I like to tune my engine's myself anyway.

Back to my point; Good job, Horizon!

Thanks for the info Pete! Your brief write-up of the EFI system is exactly what needs to be circulated with the early release notes and photos. I wish you luck with this project.

It wouldn't hurt to publish the same info in some of the other popular forums.

I think that this is really great. I like it. It will defintely be interesting to see these out in the field soon. I am quite impressed with what Evolution has done here.

Found a few more pics ;)