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Old 07-01-2019, 09:16 AM
Hinckley Bill is offline
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Originally Posted by clockguypete View Post
Here are a couple earlier videos I made running the new engine.
https://youtu.be/xGTtIIcAGfs
Second video shows a successful hand start after some initial needle adjustments. I figured out the little surging condition was due to a slightly lean condition on the low carb adjustment screw. I richened it up 1/8 turn and it smoothed right out with good transition to high throttle!
https://youtu.be/q30k2tberBo

Thanks so much for the information and great videos
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Old 07-01-2019, 09:25 AM
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Thanks so much for the information and great videos
Thanks for the nice comments Bill😊
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Old 07-02-2019, 12:10 PM
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@ clockguypete . I'd sure like to know how the 100LL gasoline performed. I have a ZDZ 90 and it calls for 98+ octane.
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Old 07-02-2019, 01:15 PM
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@ clockguypete . I'd sure like to know how the 100LL gasoline performed. I have a ZDZ 90 and it calls for 98+ octane.
I have not tried the 100LL fuel yet. My cylinder temps never got above 180degF. Most of the time when I checked them they were 130 to 164deg F running on the test stand, with ambient outside temp 75degF. I am not cowling in this radial, so I doubt I will need to spend over $5.64/gal on the Aviation fuel. I may still try some out of curiosity, but I am not convinced it is necessary.
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Last edited by clockguypete; 07-05-2019 at 11:45 AM.
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Old 07-02-2019, 07:59 PM
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Well I've got the Evolution 260 and it's never been fired up. I'm wondering now if It was a mistake purchasing this engine with now no support from Horizon ( or so i'm told?). Will the UMS engine's interchange with the Evolution engines for parts and support? Options?? just asking
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Old 07-03-2019, 08:31 PM
CH Ignitions is offline
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Well I've got the Evolution 260 and it's never been fired up. I'm wondering now if It was a mistake purchasing this engine with now no support from Horizon ( or so i'm told?). Will the UMS engine's interchange with the Evolution engines for parts and support? Options?? just asking
Some parts will , but do not worry , if you have issues I can help you or any EVO radial engine.

Adrian
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Old 07-04-2019, 06:13 PM
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Some parts will , but do not worry , if you have issues I can help you or any EVO radial engine.

Adrian
This is why I will likely buy one of these around Xmas this year.
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Old 07-26-2019, 01:35 AM
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Originally Posted by clockguypete View Post
Here are a couple earlier videos I made running the new engine.
https://youtu.be/xGTtIIcAGfs
Second video shows a successful hand start after some initial needle adjustments. I figured out the little surging condition was due to a slightly lean condition on the low carb adjustment screw. I richened it up 1/8 turn and it smoothed right out with good transition to high throttle!
https://youtu.be/q30k2tberBo
Hi does the engine run smoothly with pump or without pump?
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Old 07-26-2019, 07:19 AM
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I found the engine would run well with or without the pump after it is well primed. I do however recommend using a pump since it will provide a consistent fuel supply to the carb during initial cold start and while engine is under load flying in all aerobatic orientations. The cause of the slight surging I noticed on the test stand was simply the low end carb setting 1/8 of a turn too lean. Once I richened the low end, the engine smoothed right out.
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Old 07-27-2019, 11:12 PM
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What is the pros&cons between ums7-160 and moki180. Which is the best option apart from the thrust
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Last edited by vickyz; 07-28-2019 at 06:00 AM.
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Old 07-28-2019, 07:17 PM
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just curious - maybe i overlooked it, but what is the warranty like that comes w the UMS radials?
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Old 07-29-2019, 07:53 PM
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I'm pretty sure a UMS radial is in my future. Either a 5 or 7 cylinder would look nice in the cowl of the big Phoenix Waco.
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Old 08-05-2019, 09:31 AM
CH Ignitions is offline
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just curious - maybe i overlooked it, but what is the warranty like that comes w the UMS radials?
It comes with 1 Year warranty.

Adrian
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Old 08-09-2019, 09:31 PM
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How can i get the sound of a moki engine "deep bass" from ums 7-160? Is the exhaust muffler material play the role? Any suggestion if i can replace the exhaust ring to other material to get the moki sound?
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Old 08-12-2019, 08:56 AM
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How can i get the sound of a moki engine "deep bass" from ums 7-160? Is the exhaust muffler material play the role? Any suggestion if i can replace the exhaust ring to other material to get the moki sound?
The exhaust is Aluminum on both , needs a bigger diameter but even so...Moki is 5 cylinders , 160 is 7 cyl .
And lets say at 1000 RPM you can distinguish the Moki better since are less instances happening. In one cycle you have 5 instances that are spaced more apart and can hear better VS 7 instances in 1 cycle .

Adrian
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