Super hot shot upgrades

[Hotshot’07 0]

I have a super hot shot and I’m looking at upgrading it, which upgrades would you say are the best. I’m looking at getting a Tamiya super stock motor but don’t know weather to get the RZ, BZ or TZ which would you recommend? Thanks

[alvinlwh 7052]

56 minutes ago, Hotshot’07 said:

RZ, BZ or TZ

They are all almost exactly the same, just get whichever is cheapest at the time of purchase. 

If you want to really split hairs, the RZ has slightly more RPM while the B/TZ more torque. B and T are exactly the same except B is more expensive as it has a dust cover. 

[toyolien 5582]

BZ comes with a foam dust shield/cover if I remember correctly. That's useful if driving in dusty conditions..

[Hotshot’07 0]

Might go for the BZ, I’m currently running the sport tuned motor with everything else standard other than bearings, will I need to up-rate the gears to tolerate the higher torque and rpm?

[Saito2 7327]

Other than using a steel pinion gear, the rest of the drive train is pretty robust in the Hotshot series. You may need to adjust the gear ratio (via the pinion gear) based on motor temps when running. With brushed motors, gearing down (smaller pinion) is normal for more powerful motors.

[alvinlwh 7052]

I run an FDR of 8.23 with a TZ on my Thunder Dragon and it is manageable. I used to run 7.2 and the motor got roasting hot. 

[BuggyDad 5388]

I've started with a 15T in my Boomerang, which is FDR 8.7, on a BZ. I gave it a fairly light run and the motor was warm enough that I feel the need to keep an eye on it. Jury's out on whether I'll have to go down a tooth. I feel like from what I read that my drivetrain runs quite free for the series but there's more resistance in it that anything else I have. I am tempted to set it running on the bench for a time to try to sort of run the gears in, if that's a thing? 

@alvinlwh are the HS series and the Thunder Dragon et al exactly the same drivetrain? 

Anyway, because of this resistance it does seem to me that the HS series brings a particular justification for brushless that many other cars don't. My guess is a 13.5t would be really nice in it, with wider pinion choice without so much heat concern. Having said that, mine will most likely stick with the BZ. 

[alvinlwh 7052]

2 hours ago, BuggyDad said:

are the HS series and the Thunder Dragon et al exactly the same drivetrain?

The HS chassis is slightly older than the TS one but given that they are just 2 years apart, I expect them to be quite similar. 

Having said that, I do have a 2700Kv in my HS2 while the TD has the TZ. 

[Robben 0]

On 10/2/2024 at 9:52 AM, Hotshot’07 said:

I have a super hot shot and I’m looking at upgrading it, which upgrades would you say are the best. I’m looking at getting a Tamiya super stock motor but don’t know weather to get the RZ, BZ or TZ which would you recommend? Thanks

Considering your Super Hot Shot, if you prioritize speed, the RZ might be the best fit. For off-road or heavier-duty use, the BZis ideal. The TZ offers a balance between the two.

[alvinlwh 7052]

21 minutes ago, Robben said:

For off-road or heavier-duty use, the BZis ideal. The TZ offers a balance between the two.

According to this post, they are exactly the same? 

 

 

[MadAnt 71]

Try not to overpower the car, but also choose something that gives good torque, because it takes more power to move when running a 4wd buggy like the Hotshot. My Hotshot II is running with a Team Orion 17t Method SV2 brushed motor with 0 degrees of timing and it's more than enough power for a parking lot runner. If you run on pavement a lot, a set of Duratrax Bandito tires with the soft compound hooks really well and makes the car very drivable with the extra power.

[Rajii 1]

For upgrading your Tamiya Super Hotshot, the choice between the Super Stock RZ, BZ, or TZ motors depends on your specific goals.

The RZ is great for balanced performance, providing a good mix of speed and torque, making it suitable for general use. The BZ offers higher RPMs, which can be beneficial for more speed on flat surfaces. If you’re looking for maximum power and acceleration, the TZ is the best option, although it may sacrifice some torque at lower speeds. 

[alvinlwh 7052]

Check Tamiya's own numbers and decide for yourself. 

They all have the same torque, 500cfcm/49mNm. The RZ has laydown brushes which gives it 1000 more RPM than the T/BZ. They both have 26500rpm.

https://www.tamiya.com/english/products/53697/index.html

https://www.tamiya.com/english/products/53696/index.html

https://www.tamiya.com/english/products/53930/index.html

[Pizza Frog 689]

18 hours ago, BuggyDad said:

I've started with a 15T in my Boomerang, which is FDR 8.7, on a BZ. I gave it a fairly light run and the motor was warm enough that I feel the need to keep an eye on it. Jury's out on whether I'll have to go down a tooth. I feel like from what I read that my drivetrain runs quite free for the series but there's more resistance in it that anything else I have. I am tempted to set it running on the bench for a time to try to sort of run the gears in, if that's a thing? 

@alvinlwh are the HS series and the Thunder Dragon et al exactly the same drivetrain? 

Anyway, because of this resistance it does seem to me that the HS series brings a particular justification for brushless that many other cars don't. My guess is a 13.5t would be really nice in it, with wider pinion choice without so much heat concern. Having said that, mine will most likely stick with the BZ. 

My Boomerang has less resistance in the drivetrain after I replaced the front driveshafts with Hotshot driveshafts, the Hotshot driveshafts are 1mm shorter.

[Saito2 7327]

7 hours ago, Pizza Frog said:

My Boomerang has less resistance in the drivetrain after I replaced the front driveshafts with Hotshot driveshafts, the Hotshot driveshafts are 1mm shorter.

Someday I hope to unravel the mystery of why Tamiya used equal length driveshafts/dogbones (which bind) on the Boomer and Sabre.

On 10/3/2024 at 3:40 AM, BuggyDad said:

are the HS series and the Thunder Dragon et al exactly the same drivetrain? 

The Thunder Dragon's drivetrain, in theory, is more efficient but only if you take the time to clean a shave the poorly molded bevel gears by the prop shaft in the newer re-re'd models, lol. It is evolutionary in nature rather than revolutionary when compared to the HS series vs something totally different like the Avante.

[Hotshot’07 0]

Thanks for all your responses,  the BZ is the one I’ll get, then put the sport tuned one that’s on my super hot shot at the minute either in my hornet, boomerang or king cab. How much quicker will the super hot shot be from the sport tuned compared to the BZ? Need to fix up my king cab as well as its a bit knackered and my boomerang needs some electrical work (might be a whole electrical redo with that) and a suspension part replaced.

[Andreas W 2274]

You will get a lot more torque from the BZ than the ST I run a TZ or BZ (according to which one I recently refurbished) with a 13t pinion in my Thunder Dragon. On 2S it has some serious grunt. The ST is also nice in that car, but is a notch or two tamer.

 

The brushes wear fast and so does the comm,  so if you run it a lot it could be wise to have another one (or the ST you already have) in backhand,  so you don't have downtime. 

 

The ST is also a good match in the Hornet,  if you are finished with digital throtle management (the same is even more important with the SHS from now). Then it's smart to bring bothe while running.  10 min for one and let cool down while you run the other. 

[Pylon80 3422]

On 10/3/2024 at 4:04 AM, Robben said:

The TZ offers a balance between the two.

Just to avoid confusion: a TZ and a BZ are one and the same motor. Only difference is the color of the can, sticker and the fact that the BZ comes with the little foams to protect from dust - highly recommended.

[Hotshot’07 0]

The other thing I’m thinking about is the gear ratio I want on the pinion and spur gears

[alvinlwh 7052]

1 hour ago, Hotshot’07 said:

The other thing I’m thinking about is the gear ratio I want on the pinion and spur gears

Don't think you can change the spur. For the pinion, I will suggest 16T for a FDR of 8.16. If that is too hot, change to 15T for a FDR of 8.704.