trx 3.3 or OS .21 tm for revo nitro?
 

Hello friends
I see that you know well the engine 3.3
I have a Revo nitro, I already replace bearings several times.
I ask your help
It is better to change the original bearings by Ceramic bearings, or rather change the engine trx 3.3 for OS?
I think switching to OS engine .21Tm
I do not want more power or more speed, I want more engine life time.
I want to continue using EZ Start, I do not like recoil.

I don't think the os.21 will have more power. I would just replace the same engine

okay
So you think OS. 21tm, mTOR is better than TRX3.3?
you know tell me, if OS. 21Tm works well to how many liters of fuel?
3.3 TRX damaging the bearings 6 to 8 liters of fuel. They say that this is normal in this engine.
some riders, I say to that used more than 30 liters of fuel on OS .21Tm and bearings are perfect.
is this true?

This would be good to know..
But i hear great things about OS motors

My TM has been very durable and after 3 gallons of 30% nitro still has good pinch and makes great power. It's very easy to tune and stays in tune. It's also quite a but more powerful that the 3.3 trx. I just had mine apart converting it to bump start only and the bearings were in perfect shape with no sign of leakage from the front. Great drop in replacement but it is rather pricey.

hello everyone!
I have not bought yet, a new engine for my revo.
What suagestão you say today?
want a durable motor

Of course you shouldn't buy a Traxxas engine.

OS all day long.

thank you for your cooperation:
What model and size you recommend (.18 .21 or .28 )?

traxxas 2.5 = .15
Traxxas 3.3 = .18
OS 18 CVR = .18 = same size as traxxas 3.3
OS 21tm = .21 = More powerful replacement for the traxxas 3.3

OS engines are very good engines and have been very reputable for 30+ years. I personally have been running os for over 20 years and would recommend an os engine over a traxxas.


if your looking for a reliable, easy to tune, comparable engine, OS 18CVR. its technically the same size as the trx 3.3 and a little faster then the trx 3.3. The os21 is a huge power house over a trx 3.3. Still a great engine but puts a lot more power out. or you could run carb restictors in it to keep the power down.

The TRX is hard to tune, because the needle threads are to coarse. So after going through three 3.3 motors, I decided to go with the O.S 21TM and converted it to bump start. I have issues with the OWB in the stater. But now there is no starter. So i don't have OWB trouble anymore.
https://lh4.googleusercontent.com/-Z...o/IMG_2109.JPG
https://lh4.googleusercontent.com/-l...o/IMG_2112.JPG
https://lh4.googleusercontent.com/-Y...o/IMG_2118.JPG
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+ YouTube Video

I did that same trick after watching your video and that TM came alive!