Maxam

My Feedback: (62)

Mick, I run my APS pump on only 4.8 V . I hope that keeps the pressure below 4 bar. -Tom

mick15

Not FOUR BAR! FOUR PSI !

Greg Wright

My Feedback: (6)

Dang!!! That's like over 58PSI I hope you have everything secured tightly...

rbgetz

Hi Mick15.. I was curious as to what voltage you're using on the APS pump to give you the 4 psi?

Maxam

My Feedback: (62)

ooopsey, You all knew I meant 4 psi!!!! I need to be put down. Yes rbgetz me too.
Greg I meant 480 volts to get 4 bar.... I am using all steel braided line

Ragz

On the new emcotec fuel pump RX...I need to setup the pump at 30% to 60% depending on engine size. I think I will start with 30% on the ATV trim to make the pump run at 30% and give it a try.

mick15

I have always used a Flightworks 100 controlled with a rotary knob through a cheap brushed speed controller. The feed to the carb is 4mm Teed with a3mm loop back to the tank. This setup gives you a small amount of mixture control whilst the basic pressure is set by the length of the 3mm loop, the longer the 3mm loop the higher the pressure. Extra to this although not necessary, I have a mix with the throttle to trim the pump speed.

m

Ragz

how can you tell if you need to increase the pump speed? I reckon its surely pumping at much higher pressure than the stock engine pump.

mick15

With a pressure gauge.

M

Maxam

My Feedback: (62)

Jaketab, I just finished running one of my 215's with the added oil. Like always a little bit of grease came out but Just like Dave Mogman said, no messy oil spray. The grease seemed just a bit softer. I think we are good to go. Thanks Mogman!

Scott Prossen

Mick,
Are you familiar with Mr Sven Lange of SL-Proppeller? I just got an adapter, 3-blade hub, spinner, and a beautiful set of 32" black painted with yellow tipped wood blades. I got them from him because there was nobody else I could find that has it available for the new MOKI 300 since it has a larger shaft.

I have to say that Sven's product appears first class and very nice. Won't get a chance to use it till June or July. I'm impressed with the product. will supply pictures and more info soon.

Scott

mick15

Hi Scott, nice to hear from you mate. No I've not heard of him, then I don't have a 300 so wouldn't need such an adapter.

m

Ragz

Guys, I ran up the 250 on my carf p47 with a baffled cowl. I did not run the engine at full power...just bursts. Immediately after shut down, the temps were 103, 95, 68, 69, 98 celsius the first reading being cylinder #1. I don't use a turbolator, only a pump. I have not tweaked the factory needles yet. Any feedback would be nice. I didn't have a tachometer handy, but I will get one and tach this down to 3800 rpm on the ground with the carf 4 bladed CF prop set at 30x14. I plan to run the pump on 5.9V (via a powerbox spark switch) at full speed (for lack of better term).

Jaketab

My Feedback: (2)

Ragz,

Don't be shy about leaning the needle settings. I found the low needle to be most critical. The temps on #3 and #4 suggest your settings are too rich. Running the engine too rich you risk gumming or sticking the valves. Just for reference, the needle settings on my 250 are high 1-1/2 and low 3/4 to 7/8. Monitoring your engine temps will tell you if your settings are getting too lean. Cylinder #3 will generally lag behind the others but will start to even out after the engine is run in. Monitor your temps both with and without the cowl installed. That will tell you how effective your baffles and cowl venting is.

Regards - Jaketab

Ragz

ok thank you Jaketab. I will start with leaning out the mixture a bit and will report.

Ragz

I just checked and the H needle on my engine is 1.75 and the L is around 1.25. Seems very rich as compared to your engine jaketab... but mine is still new... what do you suggest? Can i lean it out to H:1.5 and L:1 since I'm using the pump? I have mixed 1 gallon of 40:1 motul as its the first few runs.. will move to 50:1 from the second gallon.

Greg Wright

My Feedback: (6)

Here is my Engine running in my Carf P-47 today. I have a pump installed in the plane.


https://youtu.be/uwtljufuYXM

wojtek

My Feedback: (73)

What procedure did you use for the break in Greg ?

I looked at your video , and this came ups as "related" lol nothing quite like a moki idling!

https://www.youtube.com/watch?v=l3DbZzfoZew https://www.youtube.com/watch?v=l3DbZzfoZew

Voy

Ragz

Greg, you engine sounded great.
Voy, that dog "idling" sounded great too

Greg Wright

My Feedback: (6)

Voy,
I've run about a gallon of fuel thru it on the ground at a mix of 32:1 mix running it at different throttle settings. I would allow the engine to completely cool down in between each run. Now i will switch over to a 40:1 mix using redline oil and i will start to fly it at that ratio for the entire life of the engine.

Now the dog thing that was funny.

rbgetz

Hey Greg,

Looks and sounds great. you'll have to let me know when you fly it. I'd like to come out and watch. I'm going to use redline oil on my engine as well. I know many recommended 40:1 to break-in and then go to 50:1. Do you think 50:1 is too thin a mix?

Greg Wright

My Feedback: (6)

I don't think it's to thin of a mix. I just want a little extra insurance for now. If i start to see any carbon build-up then i will go with less oil.

Gotz Vogelsang will recommend that you run 50:1.

The first few flights will be done down in Mississippi in a few weeks...

Growler84

My Feedback: (8)

We operate two Moki 250s (one early version, one late version) in Las Vegas during the Summer and both have only run on Redline at a 50:1 mix ratio. The older Moki has 100+ 20 minute flights on it, the newer one has 35 20 minute flights on it. No issues with either engine. Our props (Solo) are set for 3500 RPM max on the ground and anytime the nose comes down the throttle stick is at 1/2 maximum. Perhaps conservative but we love the scale sound and we live in an oven.

wojtek

My Feedback: (73)

Greg,

do you have the RPM set with the throttle opening or via needle setting ?


all best,

Voy

Growler84

My Feedback: (8)

Full throttle, high end needle adjusted for max RPM. Low end needle set such that the engine is a bit hesitant to accelerate out of idle when cold. Both engines are pumped, but no other doodads. No wait, Mike has the K&N air filter setup from Goetz on his. I'm going to install one too, considering what these things cost, we should at least afford them the protection you'd give a lawnmower engine. Both engines use the older "top hat" ignition.

Maybe I should clarify that the prop pitch is set such that at full throttle on the ground the engine will not pull more than 3500 RPM.