ORIGINAL: Grantothismo

They may say they have the same horsepower, but OS has more. Here's the proof. I posted this Feb 2004 and it is from an RCCA article:

The magazine RC Action did a comparison of all the .18's out there and the OS was the best. I posted the results here in this site somewhere:

Found it:

Just installed my CV-RX in mine. I can't wait to break it in. My .18SS was getting tired and I just read the latest in Radio Control Car Action magazine. They tested the following engines in a Traxxas Maxx using Trinity 20% Racing fuel:

Epic .18 Big Bore:
Top speed - 39.15 mph
Time to reach top speed - 6.94 sec
Time at 132 ft - 3.85 sec
Speed at 132 ft - 33.42 mph

Fantom FR .18:
Top speed - 36.41 mph
Time to reach top speed - 6.62 sec
Time at 132 ft - 3.89 sec
Speed at 132 ft - 33.49 mph

Hot Products .18 Outlaw:
Top speed - 36.65 mph
Time to reach top speed - 7.49 sec
Time at 132 ft - 3.96 sec
Speed at 132 ft - 32.21 mph

HPI Nitro Star .18SS:
Top speed - 36.78 mph
Time to reach top speed - 6.85 sec
Time at 132 ft - 3.91 sec
Speed at 132 ft - 32.42 mph

OS Engines .18:
Top speed - 40.40 mph
Time to reach top speed - 6.27 sec
Time at 132 ft - 3.42 sec
Speed at 132 ft - 38.15 mph

Peak Racing Diablo:
Top speed - 37.05 mph
Time to reach top speed - 7.87 sec
Time at 132 ft - 4.02 sec
Speed at 132 ft - 31.97 mph

Sirio TX-18:
Top speed - 37.31 mph
Time to reach top speed - 6.50 sec
Time at 132 ft - 3.89 sec
Speed at 132 ft - 33.86 mph

Team Orion Wasp .18:
Top speed - 30.18 mph
Time to reach top speed - 6.40 sec
Time at 132 ft - 4.69 sec
Speed at 132 ft - 27.48 mph

XTM .18:
Top speed - 30.56 mph
Time to reach top speed - 6.85 sec
Time at 132 ft - 4.20 sec
Speed at 132 ft - 29.71 mph

From these numbers it is easy to see that the OS was the only enigine to hit 40 mph and was able to get to 132 ft the fastest a full 1/2 second quicker than the next engine. This thing should have incedible grunt.

Bottom Line - Get the OS.