Heli-NuBee

OK, I did some more testing today and found that the IBEC only used a total of 120 MAH for a seven minute run on the engine. Testing of the 2000 MAH battery under heavy load proved that the battery is in good condition and has full capacity. I changed the jumper on the IBEC and will now run the ignition at a higher voltage of 6.2 V. I started the engine on the new setting and it ran well. I am going to give the IBEC one more try before I give up on it.

Heli-NuBee (AKA Roger the radial rabbit)

jspauld2

Hi Guys,

In regards to the new smaller RCExl ignition versus the older style RCExl ignition: there should be no difference in the operation or the internals that would cause the issues you are experiencing. The ignition itself should use NO MORE than 500 mAh at wide open throttle. You should easily be able to run a 2000 mA battery for 1.5 hours powering just the ignition (I'm not sure about how much current draw the ibec demands). From the above post, it seems like it draws quite a bit of current.

I have also heard about a lot of guys running the ibec with no issues, maybe some of them can speak to what they are doing to be successful?

Marty H. if you haven't sent your engine in yet, I can confirm that they only need the engine. If they give you any problems with that let me know and I can straighten it out.

Thanks,
Jimmy

Marty H.

I just dropped it in the mail, you should get it early next week. It will be interesting to see what the problem is.
Thanks Jimmy.

Near Hit

Hi Jimmy,
Thanks for your reply on the ibec conundrum. If it's just a matter of using different type of batteries I can handle that.
I'll be standing by to hear from some of the others who are having success with the ibec and the 10cc.

StalkerKHV88

Hi guys! I decide to use Macs muffler 6720 with my evo10, but today i've found this comment in tech notes on Tower Hobbies "Not recommended for use on the Evo.10CC GX (gas) Motor". Whats the reason? I didnt see any complaints on forums.

TomH

My Feedback: (4)

hey Stalker, can you give me towers part number for that pipe. i want to get one.

StalkerKHV88

Stock number is LXXYM3

Heli-NuBee

I flew my Evolution 10 GX powered Pheonix 40 Spitfire again this week and continued to have engine running problems. The engine missed and ran rough again even though I changed the setting on the IBEC. I am quite sure I have a problem with the IBEC or the ignition. I removed the IBEC and installed a second switch and battery. If this does not cure the problems, we will know the ignition is acting up. I also flew my Evolution 20 GX powered GP Stuka and it continues to perform well.

Best wishes and good safe flying.

Heli-NuBee (AKA Roger the radial rabbit)

ke6gkc

I have been running the Tech-Aero IBEC on the 10gx with out any problems. I am running one pack, an A123 2300mah for both the ignition and the servos. The power for the IBEC is connected directly to the battery. I am not using the receiver buss board. If you have any questions please ask and good luck.

Bruce

the pope

Any ideas why the macs muffler is not recommended ? I got one when it was mentioned here a while ago when all the original mufflers were leaking etc . I have a OS 55 i could put it on so it wouldnt go to waste but it would have been ideal for the evo . Some input from the horizon guys would be cool as to why this may be the case . Cheers the pope

ahicks

My Feedback: (2)

I did look into it and saw the following on Mac's web site:

(MACS Product Does not guarantee this muffler when it is used on the Evo.10cc GX(gas) motor)

Knowing others have run them quite a bit, without incident, why they've chosen to take this stance is beyond me? How they're going to prove a defective one returned to them wasn't on a 55AX is another question?

earlwb

Not enough muffler pressure for it to pressurize the fuel tank properly. The Evo 10cc needs a little more muffler pressure for the carburetor to work correctly. Gasoline requires a very lean air fuel ratio mix compared to glow fuel and it only works within a very narrow air to fuel mix ratio as well, whereas glow fuel has a much more wide operating range for the air to fuel ratio in the engines. Thus the carburetor is more sensitive to that. That was one reason many engines use a fuel pump and a fuel pressure regulator in order to keep the air fuel ratio just right.

What might work Ok is to use the regular .46 AX MAC's muffler instead ofthe 55AX version. The smaller 46AX muffler would provide more muffler pressure. But I don't know for sure as I don't have one I could try.

Russmall

I've been flying my Evo 10 with the 6720 Macs muffler now for eight months without any problems. The combination runs perfect so I can't imagine what the concern would be.

FlatSpin

I agree! I've been using the MACS muffler on my Evo 10cc since about February without issue. I have 3+ gallons thru it and it is running strong. The max RPMs I have gotten with a 13x4 APC is ~14900. (DX-8 w/Tlm). I am a sport flyer, so I am not interested in worrying about every detail to squeeze out the last bit of HP, etc. In other words, YMMV, but for me the MACS is just fine on this engine.

Dave

chandley43231

My Feedback: (2)

I have N extra 10cc evo with the Pitts muffler 4886 bison got 2 for my b-25 but sold the bomber

Marty H.

Two thumbs up for Horizon Hobbies, received the engine back two weeks from the day I mailed it. Aparently there was play in the piston wrist pin, which caused some metal to go through the engine. They sent me a new motor. I will not hesitate to buy another Horizon product. Stand up company. Hopefully I can get it in before the weekend, then its off to do some full power Cubans.

flyinwalenda

My Feedback: (5)

When did you purchase the engine ? Curious if this was an early production or later. Seems a few of us had problems on early production engines with crankshaft pins.

Marty H.

I purchased it in February, I would say it's a fairly early model. Quick question is there any problem with breaking in an engine in cold weather, say 5ºC?

flyinwalenda

My Feedback: (5)

The first one I broke in right after I received it in February. I did it on the ground (didn't want to trudge through snow to retrieve a possible dead-stick) and carefully monitored the engine temps as I went along. Some say it may not get hot enough in the air on a freezing cold day to properly break-in......I'm not so sure about that.

Marty H.

I have a temp sensor around the plug. I will keep an eye on my temps.
Thanks Brian

JuzzaAus

I know I am about 10 years too late but my evo 10cc is bolted in and ready for maiden on my RV8. I had a little play on the ground but time to set her free. Now only to find some where quiet and away from park rangers.

Heli-NuBee

I flew my Evolution 10cc gas engine powered Pheonix Spitfire again this week but now it has a separate battery for the ignition. I removed the IBEC and installed a second switch and battery for the ignition. The engine now runs great and did not miss or run rough as it did on the IBEC. The engine does have a tendency to flame out when running at idle during landing. The engine is not fully broken in as yet and some fine tunning of the low speed needle should cure the low throttle flame outs.

Best wishes and good safe flying.

Heli-NuBee (AKA Roger the radial rabbit)

NM2K

My Feedback: (14)

Too bad you can't break-in the engine on alcohol. It would break-in much faster than gasoline, as gasoline has much more lubricity than alcohol. It's not worth the effort to bother converting the carb to an alcohol metered setting.


Ed Cregger

Marty H.

Installing my new 10gx this morning that Horizon replaced and I noticed no washer on the sparkplug. I can't remember if there was one there before. The sparkplug was already on the motor, I noticed it when I was wrapping my temp sensor around the plug. I did a search with google image found this image. Anyone know where I can find one those washers easily? I don't have any spare plugs, I guess its time to find some. Also would it be a bad idea to run the motor without that washer?

Marty H.

I found one, I remembered I had some old glow plugs stored away. After digging and swearing at myself "where did I put those #$%#@! damn things". Perfect fit, should be good to go now.