I get no answer from RC TALK, any body can help w/ the answer

[eliansito]

Hello, anybody know why this different on hpi engine versus os on the ps / hp

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anybody know why this different on hpi engine versus os on the ps / hp. see the spec


Hello, anybody knows why this different on hpi engine versus os on the ps / hp. see the spec HPI SAID 2.2 PS/OS 0.67 PS How with almost the same cu in HPI will have 3 timis more POWER !!!!!??????
Even on other OS bigger engines do not get to 2.2 ??
SPECIFICATIONS
Stock Number: OSMG2033
Displacement: 0.152 in³ (2.49 cc)
RPM Range: 3000-30000
Output: 0.67 hp @ 29,000 rpm.

Power Output: 0.68ps (0.69hp/29,000)11510 15CV-X ABL parts listing
HPI Nitro Star T3.0 Engine
Displacement: 0.18 cu in (3.01cc)
Maximum Power: 2.2PS/31,000 RPM
Status: Online

 

[SSX]

try not to post up the same thread twice if you get no answer, it clogs the forum.


be patient and wait for an answer dude.


as far as i can see, 1 is a 2.49cc and the other is a 3.01cc so the displacements are different for a start.

usually for instance, 2 .18 engines from different manufacturers will be different in power. this is because they will almost certainly be port mapped differently. a more aggressive port map = more hp but less reliability overall.

port mapping - distance and size of the following:

inlet port
outlet port
transfers ports

 

[TRXaddict]

That OS motor is a .15 ... compared to a 3.0 thats a downgrade. .18 is about the same size as a 3.0 Look into engines the same as .18 or larger. Then you'll see more reasonable numbers for your application.

The .15 is a small engine good for like rc cars or small buggies/truggies etc.

When looking for motors looks for motors atleast equal to your engines size if not bigger. So if you have a .28 i would look for OS motors .28 or larger. Or if you have a 3.0 i would get something like a .18 or maybe even larger

This motor is the same displacement as your engine the 3.0 http://www.osengines.com/engines/osmg2110.html This is the same CC engine as the one you have stock. produces 2.28 HP

Go nuts, get this http://www.osengines.com/engines/osmg2035.html Puts out about 2.4 HP

In general you want to just look at motors the same size or larger. The .15 is small compared to the 3.0 i believe that would explain why the .15 doesn't produce as much power as your stock engine.

 

[HPI-Killer]

OH MAN, I got here as fast as I could... Oh nevermind someone else posted..

 

[SSX]

OH MAN, I got here as fast as I could... Oh nevermind someone else posted..