Savage shifting with BL motor.

[bl-is-future]

I see that many people lock there transmissions in a gear. Why is this? I would like to hear it shift cause i think it is cool. but i dont want to screw anything up . I had my transmission set while it was nitro and now that i dropped a BL motor in it doesnt seem to shift. I will adjust it to shift if i hear it is okay to do so. So again what is the reasoning for locking your transmission in a gear? Can i adjust mine so it shifts with out hurting components?

[lincpimp]

Main reason for locking a 2 speed in one gear is to eliminate the one way bearing and use the motor brakes. If you do not mind mech brakes you can leave the 2 speed. My savage has that setup and it works fine for me. I did some adjustment to get it shifting at the correct time. I think I raised the shift point, so it would stay in 1st longer.

[bl-is-future]

Originally Posted by lincpimp

Main reason for locking a 2 speed in one gear is to eliminate the one way bearing and use the motor brakes. If you do not mind mech brakes you can leave the 2 speed. My savage has that setup and it works fine for me. I did some adjustment to get it shifting at the correct time. I think I raised the shift point, so it would stay in 1st longer.

K thank you now i realize the point of it. Yeah i use the mechanical brakes so i will just make adjustments to make it shift. It is the 3 speed too so that is why i really want to use it instead of locking it in.

[BrianG]

Another advantage to locking into a single gear is that you get reverse as well.

[bl-is-future]

Originally Posted by BrianG

Another advantage to locking into a single gear is that you get reverse as well.

Well i have the reverse module too. But i dont know i might still lock it because i do like the idea of reverse without the module and motor brakes. Ill try both and see what i like better.

[BrianG]

Well, getting rid of reverse/first gears (and OWB) from the tranny, servos, and associated linkages/parts can reduce weight quite a bit. Not to mention a much simpler setup.

[bl-is-future]

Originally Posted by BrianG

Well, getting rid of reverse/first gears (and OWB) from the tranny, servos, and associated linkages/parts can reduce weight quite a bit. Not to mention a much simpler setup.

Yeah i am leaning towards that direction now. Should i lock it into third and run shorter gearing?? I have the 3 speed and want all the top end i can get. I have a 16t pinion and it still is way to powerfull and would like to get more top end.

[rhylsadar]

hi

our experience with a modded 2speed in a BL savage are not very good. we only bash and very rarely drive on a track or tracklike environment.
we had problems with breaking gears and bearings in the gearbox repeatedly.
i can hardly imagine a smooth shifting without a clutch taking away the immediate power and/or a quite torqueless bl motor. but it seems to work out well for some few guys.
i fix the gearbox in first gear with such a shaft. there are plenty of gearing options playing with the spur and pinion.



bye
rhylsadar

[lincpimp]

The two speed has been working fine for me, but I do run the slipper a little looser than full tight. It shifts better than my revo, that is for sure!

[BrianG]

The only thing I would be leary of is going too far in the top end because at some point, you're gonna start to get cogging.

[bl-is-future]

Well i dont see how a BL motor would be any different than the nitro other than torque. It is not like the nitro engine stops spinning when it shifts and the clutch is still engaged when it shifts. I could lock it to save weight and simplicity of the setup but my truck is stupid heavy as it is but i do not race just bash around. Figure i can get a sweet bl buggy to race! OR Better yet maybe a kyosho St-rr. Any way not sure what i am going to keep it at. I know how it behaves with mechanical brakes so i will lock it and see how that goes. The better one will win.

Wasn't Mike going to come out with a Savage slipperential?

[BrianG]

It's really the torque curve vs rpm. Nitro engines have low power at low rpm, which BL has high power at all rpms. Naturally, when a tranny shifts up, the rpms drop. In a nitro setup, the lower rpms results in lower force on the gears. In a BL setup, the torque actually is higher because more current is being drawn to drive a taller gearing (torque is proportional to amperage). That high force "snap" during shifting is what causes the breakage.

[bl-is-future]

Originally Posted by BrianG

It's really the torque curve vs rpm. Nitro engines have low power at low rpm, which BL has high power at all rpms. Naturally, when a tranny shifts up, the rpms drop. In a nitro setup, the lower rpms results in lower force on the gears. In a BL setup, the torque actually is higher because more current is being drawn to drive a taller gearing (torque is proportional to amperage). That high force "snap" during shifting is what causes the breakage.

Okay that really helped out. to be honest i think i will just lock the tranny up to avoid all of theses potential issues. I really cant even think of a con of locking it up. Other than no cool shifting sound but that was mainly the nitro engine anyway. Thanks for all the help everyone. I now understand.

[bl-is-future]

Alright i searched this forum up and down on how to lock the tranny in second. I found how to keep it in second but still wont have reverse or motor brakes due to the one way bearing in the tranny. Any ideas??