i see...thanks.As for the thread,i would recommend the os max for a new user of rc car.this was my first engine as well and i still have it without changing a simple part of it.On the other hand the Novarossi which was my new engine after the os max,is far a better engine,but if you buy that engine as a newbie you won't have in the future any desire to feel sth faster.go for the os,you won't regret it.Moreover the spare parts of the TZ P 3 are much cheaper from Novarossi.It has a lot of tourque and if you gear your car with long teeth set up you'll have top end as well.Be patience and go for a better angine after some months of use with your os max.There are a lot of things that you must learn about tuning,temperatures,plugs,clutch set up etc...it does not worth to try all this new stuff for you on a Novarossi!