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RC talk:Setting a Hobbywing Xerun 120A v2.1 for Open/Boosted setup

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I've been racing here at Aspire Racetrack in Doha,Qatar for about a year. We've started using a 17.5T motor in Blinky mode as a club race rule. This was our first season race composing of 6 consecutive races which we conducted once in each month. All participants are running on Blinky Mode where there are No Boost and Timing settings on the ESC but Timing in the Motor are allowed. And since the Group wants to level up and move to a more faster, We decided to end the season to 17.5T Open Boosted race. This is a race with no limit at all, you can use all the boost, timing, turbo, and all that are available for you to max out and burn possible your motor.

On the other hand, what are those things that I have mentioned. It seems for me is new words that need to define and need to know more on how it affects the performance of the car. I read a lot of this words being tackle and shared among R/C groups and none of them explain better since each word could be similar or different depending on how the Racer use it. So I have to stumble upon this information during my research and I would love to share it with you. This information are not mine thus I'm not responsible for your motor nor your ESC getting burn. I believe this information regarding the ESC capability especially a Hobbywing ESC will make a difference with regards to tuning and selecting the best compromise setting you want to achieve. As we always say that each race driver has his own skills and different configurations whisuitits his driving style. So without further a do. Here's the list of important settings you might want to consider on setting your ESC to the OPEN/Boosted Category. Good luck!

What is boost?

Boost is basically where the speed controller overclocks your motor depending on your actions on the track, it can with some classes really REALLY increase the speed, at the expense of heat as per usual.

let me just say, this is NOT FOR BASHING as it will quickly burn out your motor, motors are not designed to be pushed outside their maximums for long.

How its different to standard settings, eg blinky

Right, the main difference this has to blinky, or zero timed racing is the dynamic timing. Blinky doesnt have this, as soon as it reaches top speed, thats it, boosted will add timing depending on the settings to make the motor turn faster than what its KV limit is, think it as VTEC in honda engines.

Timing is where it sends a pulse at a different time so it forces the rotor to go faster to get to that location, if that makes sence, this increases speed at the expense of less torque and heat. this can be done on the end of the motor where the sensor plugs in, usually by undoing some screws and rotating it, with the speed controller, Blinky allows timing to be adjusted only on the motor, boosted allows both, but be careful either way!

Sounds fun, now what do i need?

Usually, a decent, 10th speed controller, usual makes are

Hobbywing Xerun series, including rebrands like the HPI flux pro ect
LRP Flow series
Speed passion Reventon series
Tekkin RS series

basically, any high end speed controller with usb programming, and it HAS to be sensored

99% of the time, you need to change the firmware from zero timing to say mod or open or something like that, done with the usb programming.
The Hobbywing v3 series can be changed using either a computer, or if you are desperate, you can do it directly on the LCD programming box.

Right, i managed to get the esc from blinky to boosted, what do i need to do next

main thing you have to do now, is unless you font wanna run much boost and turbo n stuff, i really gear down.

for 13.5, i was running about 8.7fdr for a large-ish track, as most of the speed is now down to boost, you can change gearing a bit depending, but really watch your temps.

next thing is to get your head around the new setting you should mess around with, such as

boost timing - the amount of timing it has on when you are not on full throttle, usually change depending on how technical the track is, dont want too much power on a techical track, would make it a nightmare to control

Boost start RPM - how fast the car has to be going for the boost to kick in, also combine depending on how technical the track is, can be made to come on late for example if there are a lot of hairpins so it doesn't kick in too early and cause you to possibly spin out

Boost end RPM - self explaintry, when it stops boosting, eg, it get so fast and backs off the timing so it doesn't cause too much heat, not sure if all esc's do this

Boost slope - how aggressive or progressive the boost comes on

Boost controlled by throttle - again, self explanatory, do you want the boost to only apply when you are on full throttle or not.

Turbo timing - how much turbo you get. this is different to boost, this is what kicks in after a certain amount of time, useful for long straits

Turbo activation method - on hobbywing, this can be 3 methods
  • Full throttle - self explanatory again, only comes on when you mash the throttle
  • RPM - boost only kicks in when you go so fast, can be useful on larger tracks where there are lots of straits, but you only want boost down longer straits
  • Full throttle and RPM - mix of the 2
Full throttle delay - another self explanatory setting, how quick you want the boost to come on after you mash the throttle, usually has an instant setting of you're feeling brave

Turbo start RPM - same printable as boost, but usually has higher values, adjusting on how early or late you want the turbo to come on

Turbo Engage slope - The main thing that causes the turbo, this increases the timing as you go on holding the full throttle or after a certain rpm, the higher the value, the quicker the car will accelerate when on turbo

Turbo disengage slope - This is obviously the opposite of the above, but just as important, unless you are really confident in your setup, you don't really want the turbo to just instantly come off, so this progressively turns it off, so it doesn't unsettle the car as you get ready to slow down for the next corner.

these may be different depending on what speed controller you run, make sure to look into your manual for corresponding setting names.

Most of boosted classes is down to speed controller settings, so ask some more experienced users what sort of setting they run on a track, they will most likely give you a hand with sorting things out, use their setup as a baseline and change parts according to your driving style.

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