mm

SG? Standard? Short crank style? pilot shaft?
What does SG stand for in crankshafts...pls respond!!
Just bought a NTC3, how do these engines rank-up in your view:

OS 12TR
MT-12
RS 12RE
RS 12 S5
RB .12T

also, is it worth getting turbo versions of these engines even though turbo plugs are hard to find and are some $$$.

stefan

SG is the Serpent Ground (from grinding)

Most engines that are suitable for on-road are available with either standard shaft (threaded) or SG.

All the engines you listed certainly are available with SG shaft

rod_b

Standard crank looks like this


SG has an integrated pilot shaft like this


Don't get a turbo engine if it's gonna be a hassle to get turbo plugs. It's not a tremendous amount of difference. For your NTC3, if you get an standard shaft engine, you'll need to cut it. As for how I would rate these engines, here you go...

Nova RS12 S5 - This is gonna be the fastest of the list

RS12 and RB X12 are gonna be about the same. Same general construction and specs

OS 12 TR and MT-12 are also about the same. Maybe an ever-so-slight advantage for the MT-12

kevink2

What's up RodB, met you at Elite on Sat., you "crazy nut"!

theRED5

Also, on an OS engine the SG crank is called a "P" (crank)shaft, for "pilot".

Racing4Evo

iTrader: (2)

Turbo plugs are not that much more expensive. They are around $5. What people forget sometimes, causing their engine to run like crap, is stick the wrong plug in. You must have many plugs on hand in the situation where ambient temperature fluctuates year round. After you get all this down, turbo plugs will be a godsend. Believe it.

rod_b

What's up Kevin? Good racing!! Jury is still out on that head until I can put it through a whole day of racing. Where are you racing next?

Manticore

SG stands for the name of a 1/8 IC car manufactorer in Italy. It wound up because of financial problem. Kyosho invested into the ex-crews of SG and form BMT. Novarossi first makes engine (21 class) with SG shaft which directly fit to SG car system. and now almost all of the on-road car manufactorers adopt to this sytem.

I forget the full name of SG but it is definitely not "serpent ground"

muugen

Those cranks are often described as Semi Ground or SG as they are machined on a cylindrical grinder

Boomer

The Nova, RB and Mugen are all based on the same motor and all seem to be roughly the same.

the OS is a completely different bird, as is the Picco, etc.



Many motors have changeable shafts - I know my Mugen does and I assume the other Rossi based motors do. The shaft will unscrew from the actual crankshaft and you can bolt a new one in. Going from my normal clutch in my NTC3 to the Kawa Centax, I had to change the shaft and it ended up being very easy to do.

VenomWorldOrder

yep all the same. my old crank from my s1 fits into my rb cx12 side ex. i just popped out the rb normal shaft and put in the sg. now i can use it in my v1r anyone noticed that side exhaust and rear ex sleaves are the same. so technically a jp rear ex piston and sleave can fit in a side ex engine.