NEW CASTLE 1721 SPEEDRUN MOTOR

[Speed/267]

https://www.ebay.com/itm/333901619720

You would have to re-engineer it for 120+ mph speeds with Kevlar strings etc...

Almost spit coffee all over my screen

 

[LibertyMKiii]

Almost spit coffee all over my screen

So close, I'll try harder next time....

 

[Speed/267]

So close, I'll try harder next time....

I would expect nothing less sir!

 

[dani d.]

Hello everyone, I am currently rebuilding my Infraction for Speedrun. Now I wanted to ask with which gearing I should start?
I only use 6s, XLX2 and a Castle 1721

 

[K-BASH]

Probly only need a 40t an a 46t spur.

 

[K-BASH]

Hello everyone, I am currently rebuilding my Infraction for Speedrun. Now I wanted to ask with which gearing I should start?
I only use 6s, XLX2 and a Castle 1721

I'd try an use a center diff instead of a spool.spools can come apart an smack 250$ 1721 an ruin it...absolut worst way to destroy a motor.also 40t spur your best bet cause I think 27/46 is maxing motor mount out,27/46 is big as ya can use with 46t.
Also is your infraction the v2????v1 came with 3.3 in diffs changes everything

 

[dani d.]

Hallo k-bash, danke für deine Hilfe!
Yes it is a V2, I have the orig diff with 46 and also have a spool. Only a few pinions are missing to test.

 

[K-BASH]

Hallo k-bash, danke für deine Hilfe!
Yes it is a V2, I have the orig diff with 46 and also have a spool. Only a few pinions are missing to test.

Robinson makes 40t spur for diff.i use 20 million in mine.it can't come apart.smallest gear that'll
work with a diff cup.fit at least up to a 34t pinion with this gear

 

[dani d.]

Many thanks! Sounds good, i will try 34/40 and maybe with the diff and Robinson gear. Actually i use the rotolok motor mount.

 

[Snackers]

Now that I’ve seen a friend using this motor it’s even more of a beast than how it looks on YouTube

 

[RCBustanut]

No warranty on any electronics using this motor?

No warranty on it & if it blows up your Castle ESC, it voids any warranty it may have had!!

That's why I started this motor on 4S. Put in 1st on a stretched Typhon 6S I have before trying it on my Limitless. Running it with an XLX2 & geared with a 29T spool & 34T pinion, it hit 99mph & it barely hit 100% throttle, so I know I will hit 100mph+ on my next run after some minor tuning.

I was able to do 3 runs, checking temps in between. The max motor temp was 102F & my ESC was 113F. Pulled 328A max, 1.07V ripple. This is just on 4S & I have room to gear up & stay cool & stay under 500-550A on the XLX2.

 

[wadedog]

Call me crazy but I just installed xlx2 and 1721 In my Mojave it’s a handful to run . At 1/2 throttle 89 mph so much power on 6s 39spur 20 pinion . I have to wait on the weather here in the high desert just a little hot .would really like to get over 110mph ??

 

[LibertyMKiii]

It is a powerful setup indeed.
The Mojave body isn't terribly aerodynamic so things slow down drastically over 100mph when you expect it to go faster.... (comparing to other car body types.)
Either way that setup is very capable with 6s power.

 

[wadedog]

It’s very fun you have to drive it not like my typhon just point and it go straight most of the time ??. The Mojave aerodynamic of a box . The splitter and rear wing I put on was night and day difference in Handling over 70+ I’m not looking 120 or 130 anything over 100 I will be happy. Right all way want more speed

 

[Diem Turner]

It is a powerful setup indeed.
The Mojave body isn't terribly aerodynamic so things slow down drastically over 100mph when you expect it to go faster.... (comparing to other car body types.)
Either way that setup is very capable with 6s power.

Aye. 1721 on 6S is gonna be mental. I don't even wanna think about 8S

 

[wadedog]

It’s a handful to run you don’t just pull the trigger but it’s fun to drive

 

[Diem Turner]

It’s a handful to run you don’t just pull the trigger but it’s fun to drive

.