17.5 2WD Buggy Speed Secrets
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- Опубліковано 5 лют 2025
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**17.5 2wd Buggy Speed Secrets**
Motors
Use a current model spec motor that is ROAR approved.
Recommended Motor: Hobbywing G4R 17.5 ROAR Edition
Tune your motor to the recommended manufacturer settings [reach out to the manufacturer].
Hobbywing G4R recommended timing for 2wd carpet off-road is 48* on the can.
Shim your rotor to be as close to the timing board as possible. Target rotor play is 0.5mm to account for heat expansion.
Check the timing board alignment on a motor analyzer. The goal is for the timing degrees to be equal, or as close as possible to one another for the A, B and C poles.
If available, install a high-torque rotor.
Service your motor at regular intervals!
Disassemble, remove bearings, clean all parts except bearings with motor spray.
Use a high-quality lightweight bearing oil on motor bearings.
If available, install titanium or aluminum can and timing screws.
Steel interacts with the stator magnetic field and limits RPM.
If available, install Ceramic or NMB motor bearings.
Use a high quality 30mm motor fan that won’t break easily and can withstand up to 8.4V.
Run your BEC at 7.4V to turn the fan at a higher RPM, if necessary.
Recommended Fan: ProTek RC 30mm Aluminum Fan.
ESCs
Use a current model ESC that is ROAR approved.
Recommended ESC: Hobbywing XR10 Pro G3X.
Purchase an ESC programmer.
Recommended Programmer: Hobbywing Program Box Pro G3
Tune your ESC with the recommended settings for the application [Dirt or Carpet 2wd 17.5 Buggy].
Use 12GA wire for spec applications. While the 12GA wire weighs more than 13GA wire, it offers a lower resistance.
Shorter wires have less resistance. Cut your wires to a reasonable length.
Solder your joints correctly. Use a high-quality solder, soldering iron, and flux.
Recommended Solder: 1Up Racing Solder.
Recommended Flux: Liquid Flux [any brand].
Purchase an adjustable soldering iron that can be set at up to 850*.
Low temperature settings are key to a nice-looking solder joint.
Check your ESC calibration to ensure you are getting 100% throttle and brake!
Chassis Upgrades
Install NMB or ceramic bearings.
For carpet applications, install metal shielded bearings.
For dirt applications, install rubber sealed bearings.
Clean and lube ceramic bearings often!
Try to achieve a lightweight race ready chassis.
The minimum ROAR legal weight for a 2wd buggy is 1474 grams.
May require optional titanium and carbon fiber accessories, and a lightweight body.
Install a slipper eliminator [direct-drive kit] for carpet and sealed clay applications.
Install a lightweight aluminum pinion gear.
Recommended Pinion Gears: ProTek RC aluminum pinion gears.
Install the Mugen Seiki MSB1 V2 transmission internal gears & ball diff or gear diff.
V2 gear sets have slightly looser mesh, which dramatically improves “free-ness” of the drivetrain.
If available, install a MIP puck drive system, or similar lightweight bones.
Use 2 gears in gear diff applications [reduces rotating mass].
Batteries & Chargers
Purchase a charger that requires an external power supply, and an external discharger bank.
Recommended Charger: ICharger 456 Duo
Recommended Power Supply: Motiv 12V Power Supply
Recommended Discharger: RL Power Discharger Bank
Purchase a premium battery with low IR [less than 2.0 ohms]
Recommended Battery: ProTek RC 4800mah 2S LiHV
Charge your battery to 4.22 or 4.24V per cell, to account for voltage drop after charging completes.
Check with the track’s tech inspector to ensure that your battery is testing at 4.20V per cell before it hits the track.
Discharge the battery at 30 amps to 3.8V per cell, charge at 30amps to 4.22V before a race.
Warmer batteries lower IR.
Ideally, the battery should finish charging right before your race.
Clean your battery terminals with isopropyl alcohol and a Q-tip!
Ensure the battery plugs have a snug fit in the battery. - Авто та транспорт
Information wizard 🏁
Some very useful tips - thank you for the upload!
Thank you 👍
Great info 👏🏼
Could you please dive deeper into how to shim the motor or a link to good info? Great video thanks for putting the time into it
Thank you! I can do a follow up tutorial on motor shimming if there is interest. The new Hobbywing motors have excellent shimming from the factory FWIW.
@DirtConcept thatd be awesome!
@@DirtConceptI have always heard that it’s important to shim the rotor to its magnetic center. How important is this really?
@ I would say it’s a very small thing, but everything I mention adds up in spec racing.
@@DirtConceptThanks that great video appreciate it 👍
That would be a really good idea to make and spécial tutorial on motor shimming & And tunning especially for the Hobbywing Xerun G4R 17.5 T motor Thanks And Have à Nice Day and Take Care Buddy 😎👍
Great stuff! Thanks for sharing, I’ve definitely been missing out on a few things I had no idea I was missing.
Hell yeah man, I think it's now time for me to go hit some of those things I've been over looking....... bearing maintenance 🤔 yeah it's been forever!!!!!!!!! Time to get it done!!!!!!
Glad this video was helpful for you! Thanks 🙏
Hi Wes, my MSB1 pushes mid corner and exit a lot. Do you have any advice? I run on mixture of office carpet and some other black carpet that the owner calls “hybrid”. I run pin swag fronts and Nessi rears. Thanks Wes and great video like always.
Try a different tire combo. The pin swags have more push than other options (like a Fuzz Bite, or similar). Nessi’s are locked in, so you may want to consider a Fuzz Bite rear, or similar tire to induce more rotation. 👍
@ Thank you! I will give it a try.
Thanks bro! I love your videos. I've owned the mbx7re, mbx8e and mbx8re and look forward to watching your videos. I want more tips and tricks it's great to see the meticulous work you put into your builds. Any guess of a mbx9 date? Lol
Thank you for watching! 👍
Thank you …
You got it! 👍
…and this why ‘Stock sucks’ or ‘Stock isn’t stock’. Absolute joke. No offense to you and your work but this is what the industry is pushing so they can sell more crap. One of the reasons i stopped racing. The word ‘stock’ has become even more dirty than the word ‘spec’.
Go mod or go home.
-U10
👈 Big modified fan. Regardless, you do what ya gotta do to be competitive in stock.