More power out from a OS70???

[ferincr]

Hi is there any tricks to squeeze more power out of an OS 70SZH???
I'm flying at 5000ft ASL and it really bogs down to a point that I'm thinking of getting rid of the gov since it's not doing any good
I have it with a stock TT muffler. If I invest on a better muffler would I notice the difference or should I just upgrade the Raptor to a 90?
Thanks for any ideas.

[Alfred]

Any engine will bog if it's over pitched.
Havind said that, I run it on a MP2 muffler in a X-Cell60 but it used to be in my Fury Expert.
It has/is running in both models with great authority. As long as your expectations are realistic.
The engine likes to rev and needs a free breathing tuned muffler to get the best out of it.
It will run between 10%-30% Nitro and does very well on 20% ,which is what I run.
Any chance of borrowing a MP2 for a trial?
I think that you would be pleasantly surprised by the power increase.

[ferincr]

how about an MP5? would that make a difference?
I know it's designed for a 90 size engine, so I don't know how would it work on the 70.