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Kroma 180 Engine Review

Old 04-29-2006, 03:41 PM
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Goggles
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Default Kroma 180 Engine Review

Well I picked up this huge 40% yak and I needed a big engine for it. I opted for the Kroma 180 from [link=http://www.drhobbies.com/shop/]DR Hobbies[/link], I gave sales rep Todd Blose a call and in 3 days it was in my hands.

I happened to have a set of 125cc cans and headers from a DA 150 so I tried them on for size. I ended up opening up the bolt holes to the next largest size and it bolted right in. The ports were a little smaller so I opened them up a bit also. Tod recommended using 3W 200 headers, and I did buy them, but the port opening was practically the same size as the 150 so I used the 150 headers.

I installed the engine in the plane then it was time to fire it up. With the help of a couple friends to hold it back I choked it, throttle to half and 5 flips it fired off and quit. Choke off, throttle to idle, 4 flips and away it went. I figured for a new engine it would have taken a lot longer than that to get it running but all of us were surprised at how quickly and easily it started. Man what a wind storm behind this thing. I'm using a 32x10 for a breakin prop then I'll jump up from there.

We ran it only for a couple of minutes as it was getting dark and didn't have time to get to the flying field, but I was more than happy at how it started.

Plans are tomorrow to go flying, weather permitting, but I'll get more pictures, rpm numbers and perhaps a video then add onto this review.

Here's a few to start with:
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Old 04-29-2006, 03:43 PM
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Default RE: Kroma 180 Engine Review

more:
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Old 04-29-2006, 03:45 PM
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Default RE: Kroma 180 Engine Review

more.....
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Old 04-29-2006, 08:11 PM
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ben beyer
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Default RE: Kroma 180 Engine Review

Nice! I'm interested in this engine brand to. I know Max Blose really well and I've seen his son fly a bunch. I'd like to get a DR 2.6M Extra to and i'm sure they would try to sell me one of these. I'm interested to see what you find. Everyone I read about that has one really likes them.
Old 05-05-2006, 12:20 AM
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Default RE: Kroma 180 Engine Review

I got a chance to put 4 flights on it Sunday and so far I like it. I'm still running it rich and it's a little boggy from throttle up so I still need to fine tune it for good throttle transition.

I'll get more info after I have a chance to tweak the needles and get some time on it.
Old 05-11-2006, 12:28 AM
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Default RE: Kroma 180 Engine Review

Well I put 3 more flights on the Yak tonight and with each flight I tweaked the low needle a little each time. I think I'm getting close, the transitioning is getting much better each time.

As for starting, I'm pretty impressed on how it starts. First start of the day was 4 flips choke on, fires. Choke off, 4 more and its running. On the 3rd flight I didn't use any choke and fired off on the second flip, you gotta like that. For the $1495 price tag, I think this 180 is a good deal.

I'll get some video still but it won't be anything amazing, I'm still learning how to handle this big plane and I have a long way to go in learning 3d.
Old 05-11-2006, 12:37 AM
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JohnVH
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Default RE: Kroma 180 Engine Review

Proof it flies..
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Old 05-18-2006, 01:30 AM
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Default RE: Kroma 180 Engine Review

I'm now up to 5 1/2 gallons through this engine and I really like it. It starts super easy, runs really well, and I know it's only going to get better.

Here's a couple videos for the proof.

[link=http://www.gailvin.com/kroma1.wmv]Video 1[/link]
[link=http://www.gailvin.com/kroma2.wmv]video 2[/link]
Old 06-01-2006, 10:48 AM
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Default RE: Kroma 180 Engine Review

The Kroma 180I really a good engin.It is super easy to star and powerful.
Here is the vedio of Krom 180I
http://frankyyeh.myweb.hinet.net/csav20062(new).wmv
Old 06-01-2006, 11:33 PM
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Default RE: Kroma 180 Engine Review

That's freak'in ridiculous, I can't hover or harrier yet and you're doing it from behind your back [sm=eek.gif].

I'm done with the break in process now and I've run 2 tanks of synthetic through it now. I did notice it richening some and the prop noise is louder now since I put the new oil in it, I'm using BelRay mc-1 synthetic.

I do have a little problem with fuel blow by or blow out though. I believe it is from the prop blast over the carb and drawing some of the fuel out since the carb sits almost out in the open. I bought a large intake from 3W and after enlarging the holes it bolts right in. I did have to replace the carb bolt as they were not long enough with the intake on. I'll have a chance this weekend to do more playing around with it and see how well it likes the new intake.
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Old 09-23-2006, 08:31 PM
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Default RE: Kroma 180 Engine Review

Anybody happen to know the function of the capped off ports on the top of the cylinders?
Old 12-08-2006, 02:06 PM
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Default RE: Kroma 180 Engine Review

looks to me like they have used basicaly the same casting originaly used for a piston ported single, and thats the exterior of the intake port that you can see (in other words a carb would have fitted there)
Old 06-15-2007, 11:08 AM
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Default RE: Kroma 180 Engine Review

I'm bringing this thread back up from the grave. Any update on how the Kroma is performing? I'm seriously considering.
Old 06-15-2007, 06:17 PM
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Default RE: Kroma 180 Engine Review

I originally had the 180 with headers from DA for the 150 with a few alterations to make it fit. I also had muffler cans for the exhaust and I was getting 5800 rpm with a mezlik 32x10. I was having problems with the cans, headers and the teflon connectors, part of it being very limited room in the tunnel, and burning through the connectors.

I since changed to stock mufflers, a little louder noise, but I picked up 400 rpm and now get 6200 rpm and a huge performance boost over the cans.

This is what I now recommend because there doesn't seem to be a good fitting header for it yet, or the last time I had checked there wasn't. I did get a header from 3W and it was a closer fit but because of the tight fit in the plane it still didn't work for me, but if you have more room in the tunnel than I have and you need a quiet plane, then that's an option for you.

I have about 120 flights on this engine and it's running really well so I would recommend it if you need a little more power.

Kelvin.



Old 09-14-2007, 10:52 AM
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Default RE: Kroma 180 Engine Review

Goggles:

I've got the same airframe and am looking for a replacement engine... Does the Kroma 180 provide stupid power -or- is it just Ok pulling out of a hover???

Thanks...
Old 09-15-2007, 10:49 AM
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Default RE: Kroma 180 Engine Review

If you want stupid power then probably the ZDZ 210 would be a good choice, however if you have some sort of a budget and can't afford stupid price (about $2300 total) then the 180 is a good alternative. It has decent pull out.
Old 02-06-2008, 12:28 PM
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smokin
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Default RE: Kroma 180 Engine Review

can anyone tell me the weight and hp of this engine?
Old 08-24-2020, 08:16 AM
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What Carb are you running on your Kroma 180? I have a used one and it runs good, but carb leaks after shut down. Looking for new Carb for this engine. Any help?

Scott
Old 08-24-2020, 08:19 AM
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tripilot
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Can you tell me what carburetor your Kroma 180 has? I have a used Kroma 180 with a Walbro WGA7 525, and would like to buy a new carb but cant find that exact carburetor. any help?

Scott

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