ALO 111

I am thinking of running my saito,s on 30 % instead of 15 % as suggested on the saito website.
Can I do the same on my 2 stroke OS motors?

blw

My Feedback: (3)

I think it would depend on how much the extra nitro will cost you, and what you are looking for.

Look for about 300 more RPM on your Saitos with 30%, and slightly easier tuning. That should be pretty close to all that you will get from the extra nitro percentage.

BTW, how much does 15% and 30% fuel cost where you buy it?

ALO 111

About 20 % more expensive, I am not so worried about power more interested in beter running .
What about the 2 strokes?

djlyon

Your OS 2 strokes will run on 30% nitro. But if the engines you get are set up the same way as the engines we get in the US, i.e. head shim thickness, you won't get the same handling and tuning improvement you see with the Saitos. You could see some tuning deterioration if the squish band gap is to small. You can get a significant performance improvement if you adjust the squish band gap ( head shim change) to be optimum with the 30% nitro.

Denis

caddy47

I think you will find that anything over 15% is pretty much a waste of money.

Flyboy Dave

My Feedback: (21)

....all the 4 strokes I have seen love 20% nitro.

I don't know if 30% would really be beneficial.

FBD.

DarZeelon

ALO,


Not only will the higher nitro fuel cost you more per gallon...

Because nitromethane has a lower stoichiometric ratio (look this up), your engine will be consuming significantly more fuel per flight - running significantly less time on a tankful.

Eventually, your cost per-flight will be 50-60% higher on 30% fuel than it is on 15%.

Engine longevity will also become shorter, because more power is produced.


The behavior of your engine will not be so much better... Saito engines respond great on just 15%.

Paying 50-60% more just to gain ~6% in top end horsepower (at which you are not flying at least 95% of the time...) is a waste of your hard earned cash... Your 'sport flying' fun will gain very little, if any at all.
...And you will be burdened by the thought of premature fuel starvation... Installing a larger tank will just negate the power boost...


For all-out competition, however; where every rev counts, this might be a good investment...

jeffie8696

My experience so far is that a lot of experimentation needs to be done to see if an engine will be better off with more or less nitro. A tach and different heat range glow plugs as well as head shims in different thicknesses will give you a lot of enjoyment looking for the right combo. If you enjoy engine tuning that is. I have had engines that for whatever reason just came alive on the right amount of nitro be it more or less.