[chad24]

hey guys i was just looking for a new engine. i currently have a brand new ninja 21. and was looking at the grp 21. now after looking at it they look the same except the cooling head and case. so really is the difference?

[thrash metal]

your best bet is to pm one of the sprucewood team losi guys as they are running the grp motors this season.

im sure they will be able to tell you what the differences are if any.


its kind of like the picco evo2 .21 engine is basically the same as the jammin .21 red head engine . the only difference is the cooling head and the turbo plug.

[1nferno]

I am not 100% but I think the new ninjas are made by O.S., which is a Japanese engine, and the older Ninjas are made by GRP, which is a Italian engine... BIG Difference!

[losi 8 racer]

Mario Rossi would be my guess and abit more refinement to an already fantastic motor

[Dave Henry]

as already mentioned here, the new grp engines are very similar to the ninja's they built for mugen, it is different in many ways according to grp, obviously the much larger head and stiffer case design are easy to see, but they claim all the internals use everything they have learned while building the ninja/falcon/boss engines for the last while
the way i understand it, they are manufactured with most of the "mario rossi tuned" (mrt) work incorpoated into the cnc production, so in esence they are a factory modded engine at a lower price than hand modding the same engines would cost, it should also yeild very consitent engines
i heard the ninja's are excellent engines so run it! and if you like it i'm sure the grp would be an excellent next engine for you

[chad24]

this is the original mr ninja by marrio rossi

[mpetre]

Jordan Krupp ran his MR Ninja in the Glorcs 2007 for the whole season without a problem. Excellent Engine.