Isn't 3M including two headers for each engine?
I think I saw it at 3M site.

Hey guys, what do you think i should get?
For my funtana i originally thought of either the MOKI 135 or 180(over 1 kg in weight) but now i am having second thoughts.Which one should i go for?

I would go with 3M 140, YS 140... Overall weight less than 4.4 Kg.

I definitely would go for less overall weight with good performance, than overpower and heavy plane!!!

Lightest is 3M 140. 768gram. YS 140L weighes 890gram.
I am getting a 3M 140.

How long has the 3m been in the market ? How durable and lasting is this engine compared to OS or Webra ? What I mean is the maintenance cost compared to other 2C engines.......

hey guys I was surfing the internet and i found some engine rpm figures.
i was just comparing the MOKI 135 with the 3M Mintor 140 and i found some interesting results;
the 3M Mintor 140 with tuned pipe and 15 percent nitro fuel turns an APC 16*12
at 8350 rpm.It costs with pipe $518

The Moki 135 on straight fuel with a standard silencer turns an APC 16*12 at 8300 rpm.
It costs with silencer $300.

We can see from these results that the Moki is a lot more powerful because it is only 50 rpm slower when on straight fuel without a pipe , unlike the mintor)
As you can also see the Moki 135 is also a hell of a lot cheaper(by $218!). One guy in my club has a Moki 135 and it seems to throttle brilliantly( as good as a YS engine).

On looks alone the 3M Mintor wins but if you are concealing the engine inside a cowl then it doesn't count for much.

It is clear that the MOKI 135 is cheaper,and more powerful, therefore better!
you can by the Moki series of engines at
www.justengines.co.uk
Luke

Luke,

The reason people choosing Mintor, OS Webra is the rear exhaust or wrap around header with pump.

3M 140 only weighs 768 gram while the Moki 135 weighs 820 grams.
That is about 2 oz. That is not bad at all compared to OS 140 or Webra 145.

Having fuel tank on CG, you will need pump or at least regulator. Probably a little more weight for pump or regulator (1 oz)

If using a tuned pipe to use on Pattern type planes, you will have to add tuned pipe to the Moki price.

That is $300 + header ($30 ~ 40) + Tuned pipe ($100) + pump ($30 for Perry, $60 for Cline regulator).

Total for Moki 135 in pattern $460.00 minimum. It is not bad at all. I've never tried Moki, but heard it is very good engine.
I have no idea how much the Moki 135 costs in US, so I assume it is not very much cheaper here.

The reason for 3M mintor is the lightest weight in its class. Those serious guys are willing to pay more for light weight engine and 3 oz weight saving.

I know there was at least one guy using Moki for FAI plane at World championship, but most used OS & YS. No idea why.

By the way, Moki 135 straight out of box with straight fuel on 16x12 turned 6900 rpm on one page. Another review page shows 8300 Max rpm. No idea which is correct. Typo?

Ok I'll bite on this one. The others are known quantities and rather plug and play. Using the standard you can easily get help and borrow parts from your buddies. This comes in very handy the Thursday before a contest. You will probably have difficulties fitting the Moki into a lot of 2M plane without a lot of modifications and a custom exhaust. Tuning the pump and exhaust will also be up to the user. In the US not much support for Moki's.
Could it be done? sure. Will it take some effort on the part of the user? Absolutely. I prefer to spend my time flying.
Eric Henderson had a great article in KFactor on setting up an OS 1.60 with a pump and a off the shelf wrap around header making a great pattern setup for around$450 complete.

I have to agree here. I went the S.T.2300 route and could have had a new O.S. by the time I was done jacking with everything.
$180 engine, $145 in headers, 2 broken Johnson headers before I got a good Karl Mueller header. $75 for Perry pump/carb setup, $400 total. Plus hours of frustration. The setup still runs strong today though. My last O.S. 1.40 cost me $360 nib(got a good deal) plus a Karl Mueller header $45, $405 total and has been trouble free since putting it in the airframe.
And I am going to try the Mintor 1.40 in my next setup since it is supposd to drop right in where the O.S. left off. What more could you ask for in servicability, Change to a completely diferent engine with out changing your mount and nose ring setup.

Wayne

I read from a website that Jason Schulman is running the 3m Mintor 140 in his Angel's Shadow........

That would surprise me.. Jason has been running the OS 1.40FI for quite some time now.

-Doug

hi doug, thanks for the info. actually i got the info from http://www.rcpattern.net/2cycle.htm scroll to the bottom. may be not current info

I believe Jason Shulman is running a 170 not a 140.
I think he just changed the engine within the last two months.

I have atrue moki 1.35 rpm figure taken at approx 850' ASL.

APC 16x8 .... fuel castor with 5% .... 8900RPM ... i think!

They throttle well but nowhere near aswell as trhe YS'

How is the spool up/spool down performance of the OS140EFI compared to YS140DZ ?