Gearing dex210

[Chop chop]

Guys

Running a dex210 on astro with a speed passion reventon pro and sp 7.5 motor. Ran great all night but cut out at the end of the last race and motor seemed v.hot. Left for 5 mins and run again ok as a test

I am running 81spur and 26 pinion, wondered what you guys run and whether I am over gearing perhaps. All settings are standard on esc new from box

Help welcomed as normal

[Haldenby81]

Most at my local club n I have myself run a 87t spur n 25pinion ... Sunday a ran a 81 28 combo n was great all day altho I run a 9.5t spr in mine, most set up sheets iv seen have 81 21-24 with ur turn motor so wouldn't think it's your gearing

[ekt]

26/81 is probably a bit too tall, I would start with a 22t pinion and work your way from there.

[mattr]

Does sound rather a tall gear, i'm running 22 or 23 with a 78 spur at the moment on a fairly boosted 8.5.

Also, check the firmware in the Rev Pro is the latest, the thermal (and LVC) on the earlier firmware was very aggressive. (A couple of fast laps would see one or other cutting in!!)

Also, do you have a IR temp probe? Makes it far easier to say if the motor is too hot, or not (i suspect it probably is in this case!)

[Adam Skelding]

I normally run the SP 7.5 motor on 23 or 24 / 81.
The motor timing on the end bell is around 5 degrees, but 10 is fine on both gearings.

I also have my ESC on DDRS level 2 or 3 with the timing @26.25.

I never run any boost or turbo settings on the ESC, it seems to make the power band way too aggressive and unpredictable for jumping.

Turn off the thermal protection, you shouldn't really be getting near this outdoors, even after 10mins or so of running.

Just give your transmission a quick check over to make sure its free before you go out again... Might be as simple as a seized bearing.

[av4625]

as said above i would run 22 or 23 with the 81t spur and 7.5 motor

[rcjunky]

Yup, definitely over geared

[Simmi]

Hi guys

I ran a 75 Spur Gear and have a 13,5T Orion Combo.
What pinion should I use? Small Track.
Thanks for your reply

[Dombrasky]

27 in my opinion

[Simmi]

Thank you
What is the internal Gear Ratio of the DEX210 and wich Ratio I have with the 27 pinion?

[Dombrasky]

I've always used this http://durangofansite.com/main.php?v...0&page=gearing
... at the top FDR says 7 for a 13.5 motor..so on a 75 spur, and to allow for smaller track, instead of 28...try 27, or even 26 if really small track....so 6.96 for 28.....7.22 for 27 and 7.50 for a 26

[rcjunky]

That's for blinky and no extra motor timing. I'd start with a 26 and go from there

[Simmi]

Thanks guys, that`s what I looking for