RE: Which engine is more powerfull??
Eddie, I went to the HPI web site and here's the specs of the engine.
Glow Plug: Cold R5 (HPI #1504)
Displacement: 3.01cc
Bore: 16.8mm
Stroke: 13.6mm
Power: 2.2hp @ 31,000 RPM
Maximum RPM: 32,000 RPM
Carburettor: F2-6.5 (Composite 6.5mm)
So if you compare that to the SH.18 (which you gave me)
Cublic cpapcity 2.74 cc
Bore 15.90 mm
Stroke 14.70 mm
R.P.M 29000 rpm
Power 1.0 hp
The cc is more and so is the bore and stroke so if thats the case then it is more powerfull YEE HAAA LOL................