How to Make a Faster Race Car - Stock 13.5T & 17.5T Racing

How do stock r/c cars find an advantage on the track? Today we talk about it with weight examples, all while converting our B74.1 to be the ultimate stock racer. Let's do it.

[creamyhummus]

Making videos like this about completely kitting out an RC car is my dream job.

[TastierBackInThes]

That expression when those bearings don't stop.

[gunsandcommissions]

Brett is at his best when he's talking racing buggies

[Angrykat]

I had no idea ceramic bearings rolled so nice. Another 80 bucks spent but at least I can roll to the finish line if my battery dies. Thanks Brett!

[superchargerone]

6:06-6:09... that was exactly how I felt listening to the list of upgrades.... dizzy and eyes glazed out lol. Impressive how free the gear train became with new ceramic bearings plus light weight drive gears and shimming etc.

[tiptizlode]

Wow, this has to be the single best performance video I have ever watched. I race 8th scale nitro truck, buggy and e buggy, these changes will have a huge benefit. Thank you Brett also so for not saying "lets go right ahead" even once in this video.

[andrewsumner]

Wow that’s amazing the more I keep getting into the hobby the more I appreciate these videos!… thanks for the help

[senna]

Great video, ....but...at 9:09 you have to dismont pinion from spur....😉😊

[nimblybimbly]

My takeaway:
Money is best spent on carbon side guards for weight and ceramic bearings for rolling efficiency. Do more if you're going for a championship.

[mattyf]

I thought this was a really well done video.
Speaks really well and really clearly !
Great information 👍

[modelnutty]

no hate (not trolling) 
BUT.. reducing weight to find more top speed with a taller pinion isn't always the way to go. 
a) the lower weight CAN reduce some "stiction" when you're cornering, and getting through corners keeping the speed up is very important. (there's such thing as TOO light)
b) higher top speed won't do you much good when the straight sections aren't long enough to reach that top speed, what you WANT is reaching your top speed at about 80% the length of the longest straightaway, aka QUICK.. because you're instantly going to need to slow down some to get through the next corner.
a+b = shorter lap times, if you're good and driving consistently. (practice is key too)

you do want your car as close to balanced left+ right, with front+rear weight distribution correct for your driving style through corners and jumps. 

note: decades ago in Tamiya Hornet entry level racing class I did it with cutting top of battery tray to strap 3x2 saddle pack at the rear instead of running a 3x2 typical stick pack. its a little higher CG that'd transfer weight to the outside wheels cornering in dirt, with a little more weight at the rear for traction and slight under steer. power up and induce a little drift instead of fronts digging in to spin ya.. exiting corners quicker, nicer jumping+landing too. it was better for accelerating instead of breaking loose, still having enough weight on the fronts to enter corners decelerating (the momentary weight transfer when). its different setups for carpet vs dirt, but the principles are still similar. (brushed or brushless)

at 9:20 to 10:30 (the track segment) I can see he's aware of things I'm mentioning, gearing for the longest straight AND still geared low enough to be really snappy everywhere else.. with whatever type car you're running. also.. if there is only one long straight, often you're better off hitting top speed at 65-70% of its length to have more torque+snap through all the short stuff of everything else that's 90% of each lap. your lap times can shorten with motor+ESC staying cooler.. but hey, when you're racing you get VERY familiar with your car, you can just about look at a track and know what pinion to slip in. I've still got the nice collection of pinions and spurs for my good OLD Associated RC10.

ditching your slipper is a great way to twist or break your drive shafts, you DO want the drive train to have just a little bit of slip. in the air you have some control of the vehicles pitch by using the throttle to help you land it more level, wheel speed vs ground speed differences can be like slamming everything with a hammer. you can be a great driver, but one mishap like that can take you out of the running.. there are many types of mishaps that can take you out, why wouldn't you want to eliminate at least one of the sources? this can be more an issue on carpet than it is dirt, carpet can be a LOT more traction. at the end he's mentioning it, plastic diff gears on carpet and no slipper = shred! I'd rather keep it metal and tighten the slipper a little, regardless of dirt vs carpet.

lowering rotating mass and mechanical drag definitely helps acceleration a bunch, the tires and rims are for sure the first place you want weight loss and balance both. wheels out of balance can slow your roll a lot.

after ALL THAT.. hey guys (at A-main), do you remember "the dominator" dirt/clay oval (or pavement!) car.. with no diffs, belt driven, minimalist suspension (weight), and the battery pack on the "wrong" side of the car? it was LTO for sure and took some getting used to because you HAD to run fast through corners to unweight the inside tires for its lack of diffs. battery was right side to make the outer's grip harder turning. I'd love to see it revived, it was a car that a lot of tracks deemed "cheating" because it was such a BEAST early-mid 90's. even if it was patented then, its possible a very similar concept could be produced now.

this video.. hey I get it you sell stuff, and are showing a lot of cool aftermarket items you have available for sale.. that's cool and thanks too! I just went long typing stuff lol.

[MegaDieseldriver]

“Ouch” said my wallet, and “no” said my wife

[spinrushrc]

LOSI MINI-B video coming??? You guys gotta talk about it! I hit the LIKE button.

[geoffreyanderson]

it is a good day when I can hear Brett talk RC.

[dynasty]

Been waiting for this particular video!

[moss]

9:58 Damn, these super smooth jumps :O!

[alphawlff]

Now I remember what soured me on racing back in the day. $$$!!!

[wheelie]

Been in this hobby since 1984. Always been sick of the people that care how fast can it go. My answer never changes. A million miles per hour.

[FullOnRC]

Nice one Bret, very helpful. I just bought myself a Schumacher Cougar LD2.

[erikb]

Right on, been Tellin fools lighter car is better mabie now they will listen great video🤟🏻💪🏻