What motor will the re-re hotshot handle

[tamiya monkey]

Just ordered myself a Hotshot for christmas and wondered what kind of power it can handle without wearing it out too quick, ive got a 8.5t ezrun brushless combo sat doing nothing and thought about putting that in.

[GregM]

Tamiya101.com recommends a brushed GT Tuned motor (25 turns) to get started with the Hotshot. I don't know if it runs fine with a 8.5 turn brushless, but I'm sure someone else will be able to give you advice.

[kontemax]

I used 13 T Dyna Run brown motor on my Boomerang without problems.

8.5 turns probably is too much.

Max

[Flerbizky]

Don't know if it's as indestrubtible as a Blitzer Beetle gearbox, but i've been running a 9T BL in a BB for a while. Gearbox has nowear whatsoever..

[kontemax]

Probably the Hot Shot can manage a 8.5 turns but wearing will improve a lot.

You absolutely absolutely need a steel pinion gear.

Max

[matman]

I was running a 5.5 for some time & it did kill the gears ( but i didn't have the steel pinion ) & did have thrust bearings .

So with all bearings in , I now run 10.5 , as the 5.5 was just nut's = (just pulled wheel stands all the time ).

So with the 10.5 in & turned down to suite the track , as that enough . With steel pinion in , I have had no problems .

The biggest problem was the dog bones & out put shaft's wearing fast & that is getting costly .

[Grastens]

In addition to the gear-train durability, there is also the little problem of the near-zero airflow in the Hotshot chassis, but with the right steel pinion gear it should handle brushless power while keeping temperatures down. I would agree that 8.5T seems to be a little too much, however.

[tamiya monkey]

Well ive ordered the bearing and an 13t and 15t rw racing 32dp steal pinions, i use these in all my cars, might just fit a 20t motor with the 13t pinion to start me off and fit the brushless setup in something else, maybe the grasshopper lol.

[Percymon]

I fitted a 9T EZRun system in mine - its not exaclty had much running time since (15 minutes ?) but it was fine on hard ground

[tamiya monkey]

I did think about getting a 13turn ezrun motor to go with the 60amp esc but was concerned about lack of airflow for the esc after looking at the online manual, so might stick with a brushed setup for now. Cheers guys for your input.

[Percymon]

I did think about getting a 13turn ezrun motor to go with the 60amp esc but was concerned about lack of airflow for the esc after looking at the online manual, so might stick with a brushed setup for now. Cheers guys for your input.

That is the only issue, and one that really says stick to brushed (especially if you were only thinking about a 13T brushless any). The electronics box is pretty tight too so be wary of the size of receiver and esc you select.

[shenlonco]

I did think about getting a 13turn ezrun motor to go with the 60amp esc but was concerned about lack of airflow for the esc after looking at the online manual, so might stick with a brushed setup for now. Cheers guys for your input.

all my ezrun ESC's have a fan on top so it should not be a problem with it if you get the ones with the fan...also with that 13 turn motor a 35 amp will be fine if you get the 380 sized 540 tacom or ez run motors.

[MadInventor]

I've fitted an Ezrun 8.5T in my re-re hotshot. It runs ok on an 8.4V NimH with no gearbox crackle, no idea what it will be like on LiPo though. I mounted the ESC directly under the radio access tray, then machined 2mm wide cooling slots in the radio access plate. I also had to remove a small amount of plastic from the mech deck in order to get all 3 motor wires out of the mechanism box. I can try and find some pictures to post up this evening if you're interested.

[MAD RACER]

I have been running a EZ Run 13t with a 60amp ESC with no problems. 15T steel pinion, Ball raced and Top Force Unis all round. Li Po's of course.

Don't mash the throttle on the landings of jumps & it will be fine. Any more than a 13t motor and the chassis will be over powered.

[tamiya monkey]

Well ive got a 20t hpi motor, modelsport rv12 assault lipo friendly esc, 13 and 15t steel rw pinions and bull ballraces, will be running on 2s lipo's and will see how it goes.

[bromvw]

give the 8.5 EZRUN a try . if will be like excrement off a navvies shovel but the gearbox will cope with it IMO . you can always drop the 20t in if you find its too fast .

[THE HP FREAK]

HI!... In my BIGWIG (custom aluminum chassis) I'm running a EZ-RUN 5.5T 6000KV BL system with a steel 19T pinnion and a 60 AMP EZ-RUN ESC. Full sealed ball bearings. The BigWig and HotShot use the same front/rear gearboxes. I've run mine on a 11.1 lipo with no issues. Does 51MPH on 11.1 and 43MPH on 7.4 LIPO. The only issue I had was the stock driveshaft started to get the "skipping rope" effect and was cutting into the top of my lipo batteries. So I fabricated up a custom driveshaft from a E-REVO.

[MadInventor]

Here's some pics of the EZ-RUN installation in my re-re hotshot.

It's a tight fit with the speedo but it can be done. I also replaced the ezrun on/off switch with a more conventional one that could bolt directly to the hotshot on/off switch mount/hole.

[MadInventor]

HI!... In my BIGWIG (custom aluminum chassis) I'm running a EZ-RUN 5.5T 6000KV BL system with a steel 19T pinnion and a 60 AMP EZ-RUN ESC. Full sealed ball bearings. The BigWig and HotShot use the same front/rear gearboxes. I've run mine on a 11.1 lipo with no issues. Does 51MPH on 11.1 and 43MPH on 7.4 LIPO. The only issue I had was the stock driveshaft started to get the "skipping rope" effect and was cutting into the top of my lipo batteries. So I fabricated up a custom driveshaft from a E-REVO.

That seems a bit slow for a 6000KV motor. I've been getting very close to 50mph with my thundershot using a 4000KV eZrun and a 10.8Nicad, which is quite a bit heavier than a LiPo. Perhaps your gearing is a little high for the motor ?

[THE HP FREAK]

That seems a bit slow for a 6000KV motor. I've been getting very close to 50mph with my thundershot using a 4000KV eZrun and a 10.8Nicad, which is quite a bit heavier than a LiPo. Perhaps your gearing is a little high for the motor ?

HI!... Because of the custom aluminum chassis, the car weights twice of what a stock BigWig does. Plus I have smaller than stock diameter road tires on it. Also I've got it tuned way down. If I want speed in a off-raod buggy, I'll just use my Caster Fusion 1.5R. It does 120KPH. LOL!

[MadInventor]

HI!... Because of the custom aluminum chassis, the car weights twice of what a stock BigWig does. Plus I have smaller than stock diameter road tires on it. Also I've got it tuned way down. If I want speed in a off-raod buggy, I'll just use my Caster Fusion 1.5R. It does 120KPH. LOL!

Thanks for the extra info on that. My previous comment was not a dig, I was genuinely intersted as I'm considering buying a 6000Kv Ezrun for my DF-02 that currently has a 4000Kv motor in it. I didn't want to buy the higher RPM motor if it had to be run at a lower gear ratio, negating any extra speed benefit. Have you run the system 'flat out' in a buggy with a stockish gear ratio ?

[THE HP FREAK]

Thanks for the extra info on that. My previous comment was not a dig, I was genuinely intersted as I'm considering buying a 6000Kv Ezrun for my DF-02 that currently has a 4000Kv motor in it. I didn't want to buy the higher RPM motor if it had to be run at a lower gear ratio, negating any extra speed benefit. Have you run the system 'flat out' in a buggy with a stockish gear ratio ?

HI!... It's o.k I didn't take it as a dig. I've also got a EZ-RUN 5.5T 6000KV motor in a Tamiya Dark Impact. IIRC it went like 40-45MPH top speed. I did a pinion/spur gear conversion on it with Traxxas gears and no slipper clutch. I hate slipper clutches. lol! 52T spur/15T pinion. That's 3.5:1.