Description:

The Ofna Force 25 is one of the BIGGEST of the big block RC car and truck nitro engines! It is also the biggest of the Ofna Nitro Engines. The Force 25 big block nitro engine is bored out to .25 cu. in. (4.09 cc) displacement, and this powerful big displacement nitro engine is a great upgrade for BIG trucks, RC cars and trucks originally equipped with smaller .21 size nitro engines.

This is probably one of the best bang for the buck performance upgrades that you can do on your factory powered .21 RC cars and trucks. The big displacement and BIG POWER and TORQUE of the OFNA FORCE 25 NITRO ENGINE makes it a great nitro engine upgrade for off-road applications where lots of TORQUE and POWER are needed to move big off-road rc cars and trucks over rough terrain and obstacles.

Ofna claims a healthy 2.39 HP and 38,000 RPM rev capability from the Force 25 engine! More important than peak HP numbers is the TORQUE generated by this big displacement nitro engine! There are other engines (some smaller) that claim higher peak HP ratings, but that is only a small part of the overall performance picture. On a dyno, a nitro engine can have a high peak HP spike at a narrow RPM range, but from a practical standpoint it can be a terrible engine to drive with because it lacks a wide, strong power band. A good nitro engine will have a fat power band with lots of useable TORQUE in order to accelerate and propel a big RC car, truck or buggy. This is especially true of large, heavy monster trucks. The Ofna Force 25 engine is well suited for these sort of monster truck applications.

The Force 25 features high quality ABC engine construction, a 2 needle slide carburetor, SG crank, HUGE 11 fin cooling head, rear exhaust port, and a convenient pull start.