tudordewolf
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Hey all,
I'm working on some unusual gearings and I'm wondering what input & experience the community might have. I want to create a 2-speed transmission with a much bigger step between the gears than is usually seen, which appears to be a 35-45% shift in most models. I've figured out a set of gears that'd give me a 90% leap, and I'm envisioning it on a short-course or monster-truck, where it stays in 1st gear for most offroading, and then shifts into second when really picking up speed on open ground.
The default HSP clutch bell is a 16/21, paired with either a 39/44 or a 42/47 transmission depending on model. I found an 18/23 clutch bell, which gave me about 10% more speed in the onroad, and a 14/19, which should give about 10% more torque, potentially useful in their SCT which is a bit weak in grass.
With the two available transmissions also being about 10% apart in terms of ratio, there's a nice breadth of setups to choose from to fine-tune performance.
I've had this idea in the back of my head that if I found a clutch bell with a difference of 8 teeth between first and second gear, I could take the first gear from the "lower" transmission and the second gear from the higher transmission, and create a 2-speed that spans nearly the entire range of ratios available. I assume the shift clutch would wear down faster, having to engage across a much wider RPM difference (if it's still able to grab the second gear at all), and the shift point would have the be set fairly high in order for the engine to still have the RPM's & power to climb through second gear.
I found a 14/22 clutch bell; I have to assume someone either had the same idea I did, or there's a nitro model out there I've never heard of, because I've never encountered such a wide gap. It's on the way and I'll see how it performs.
Traxxas also makes a 15T threaded gear, and HPI makes a 23T threaded gear, so I could potentially cobble together a 15/23 clutch for more or less the same effect. Does anyone know if traxxas and HPI threaded clutch bells used the same 12mm thread?
I'm working on some unusual gearings and I'm wondering what input & experience the community might have. I want to create a 2-speed transmission with a much bigger step between the gears than is usually seen, which appears to be a 35-45% shift in most models. I've figured out a set of gears that'd give me a 90% leap, and I'm envisioning it on a short-course or monster-truck, where it stays in 1st gear for most offroading, and then shifts into second when really picking up speed on open ground.
The default HSP clutch bell is a 16/21, paired with either a 39/44 or a 42/47 transmission depending on model. I found an 18/23 clutch bell, which gave me about 10% more speed in the onroad, and a 14/19, which should give about 10% more torque, potentially useful in their SCT which is a bit weak in grass.
With the two available transmissions also being about 10% apart in terms of ratio, there's a nice breadth of setups to choose from to fine-tune performance.
I've had this idea in the back of my head that if I found a clutch bell with a difference of 8 teeth between first and second gear, I could take the first gear from the "lower" transmission and the second gear from the higher transmission, and create a 2-speed that spans nearly the entire range of ratios available. I assume the shift clutch would wear down faster, having to engage across a much wider RPM difference (if it's still able to grab the second gear at all), and the shift point would have the be set fairly high in order for the engine to still have the RPM's & power to climb through second gear.
I found a 14/22 clutch bell; I have to assume someone either had the same idea I did, or there's a nitro model out there I've never heard of, because I've never encountered such a wide gap. It's on the way and I'll see how it performs.
Traxxas also makes a 15T threaded gear, and HPI makes a 23T threaded gear, so I could potentially cobble together a 15/23 clutch for more or less the same effect. Does anyone know if traxxas and HPI threaded clutch bells used the same 12mm thread?
I'm currently looking for a clutchbell for my hb r10 that's why I stumbled across your thread and I think it's badass you did your own clutchbells.
