mt12 crankshaft to nova rs12s5
i broke my nova s5 crankshaft, can the mt12 crankshaft fit into it?
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I believe you can. The timings on the crank window of the MT12 crankshaft would be different though...
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Originally posted by InitialD I believe you can. The timings on the crank window of the MT12 crankshaft would be different though... |
Originally posted by thefuzzclub meaning....., i have to adjust the needles butr will it run and idle? But still, I'd reckon you retune the carb needles from the start. And yes, before you install the crank and restart the engine, make sure the internals are clean. If you can, check and see if crnakshaft can turn nicely on the 2 bearings in the engine to see if they are properly aligned. |
Originally posted by InitialD I would not know if you can idle the engine with the MT12 crank at all. I think this you would need to try out yourself or wait for people like Dennis (Motorman) to answer or from people who have actually tried it. Why not give it a try yourself? Maybe it will be for worse or even better in terms of performance if you can get it to start. Who knows... But still, I'd reckon you retune the carb needles from the start. And yes, before you install the crank and restart the engine, make sure the internals are clean. If you can, check and see if crnakshaft can turn nicely on the 2 bearings in the engine to see if they are properly aligned. |
You should not have any problems. Providing your engine is not the newer NS5 engine. I have an MT, MT turbo, CX and RS the cranks are all mixed up to the extent that I can't remember which is which...never had a problem.:nod:
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Originally posted by dtm You should not have any problems. Providing your engine is not the newer NS5 engine. I have an MT, MT turbo, CX and RS the cranks are all mixed up to the extent that I can't remember which is which...never had a problem.:nod: Yeah, the NS12 engines have larger crankshaft diameter (11.5 mm). If you can get the older RS12 internal bearing with 11 mm inner diameter, you may install that in the crankcase and use the older 11 mm crankshafts on the NS12... Just a thought.:sweat: |
Originally posted by dtm You should not have any problems. Providing your engine is not the newer NS5 engine. I have an MT, MT turbo, CX and RS the cranks are all mixed up to the extent that I can't remember which is which...never had a problem.:nod: |
your timing will be close
Oh D one small problem with going to an 11 mm bearing on an NS. Think about it for a minute>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>Oh the light came on didn't it>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>The case still has an 11.5 MM hole in it so the crank won't seal. Small detail. Gotcha LOL |
Originally posted by Motorman your timing will be close Oh D one small problem with going to an 11 mm bearing on an NS. Think about it for a minute>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>Oh the light came on didn't it>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>The case still has an 11.5 MM hole in it so the crank won't seal. Small detail. Gotcha LOL Ummm, I don't get what you mean... The NS inner bearing is 11.5x21x5 while the normal RS12 bearing is 11x21x5. If I use the RS12 crankshaft and replace the 11.5x21x5 bearing with the 11x21x5 bearing in the NS12 crankcase, wouldn't that work? |
mt12 crank to nova s5
Originally posted by Motorman your timing will be close Oh D one small problem with going to an 11 mm bearing on an NS. Think about it for a minute>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>Oh the light came on didn't it>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>The case still has an 11.5 MM hole in it so the crank won't seal. Small detail. Gotcha LOL going back, i'm no expert in nitro engines, please make it simple. so in short i can't use the mt12 crank to my nova s5? |
If it is a RS12s5 you can. If its the NS12 you cant.
What Dennis is talking about (correct me if I am wrong Dennis) is the part of the block between the bearings. The part where the carb window is, and that the crank spins in. It is bored to a fly shit over 11mm on the RS, and a bee's dick over 11.5mm on the NS. So, regardless of the fact that you coule change the bearings, if you were to put a 11mm crank, into an NS (11.5mm hole) you will have a 0.5mm gap. Well... 0.25 all the way around the diameter of the crank. This wouldnt be a problem except for the carb opening. The crankcase will never seal at the carb window. ///edit/// The 11.5mm crank would also not work in the 11mm blocks either as it wont fit in the block, due to the crank hole diameter, regardless of bearing size. |
Re: mt12 crank to nova s5
Originally posted by thefuzzclub so in short i can't use the mt12 crank to my nova s5? |
Originally posted by sparksy The part where the carb window is, and that the crank spins in. It is bored to a fly shit over 11mm on the RS, and a bee's dick over 11.5mm on the NS. |
thanks for all the replies, i've learned a lot, i will test and will let you know the results. glad i have the rs12s5.:nod: :)
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