Did I just kill my MMM v1???

[nitrostarter]

You're geared for about 50mph, which for that motor is a bit much for general bashing. I'd try 16/40 or 18/40

[Arct1k]

Yeah that motor could destroy itself pretty easy on 4s geared for 40 (broke 3) - 5s and 50mph is asking for trouble...

Best to look around for a CC 2200 in due course...

[loa]

Thanks for the suggestion. As I'm still afraid to go full throttle with the new 5S battery (even on flat roads!), I'll go low: 16/40 or 16/38.

Since it's been 2 years since I last bought spurs/pinions for this truck, I want to get this right. I remember buying the 5mm mod1 pinion gear and I'm still using the original 38T spur from the 3.3 Revo.

So to get the 16/40, I need these:

http://www.rc-monster.com/proddetail...=5mmmod1pinion
http://www.rc-monster.com/proddetail.php?prod=TRX3955

Is that correct?

Loa

[loa]

Originally Posted by Arct1k

Best to look around for a CC 2200 in due course...

I am, just waiting for my budget to settle a bit. :-)

If I do get that CC 2200kv, will my gearing change significantly? Not sure about the 9XL's kv.

Thanks

Loa

[BrianG]

A 9XL kv is around 1853. If you use a CC2200 motor, you will have to gear down a bit to retain the same speed.

[loa]

Thx BrianG. I found your calculations page. Thx for these!!!

Loa

[nitrostarter]

http://scriptasylum.com/rc_speed/_top_speed.html

Use this page.

[BrianG]

total_motor_rpm = motor_kv * battery_voltage
Speed (in miles per hour) = ((total_motor_rpm / total_reduction_ratio) * tire_circumference)/1056

Or, just use this instead.

[loa]

Hello,

Using the formulas on the scriptorium, going from 20/38 to 16/40 means a 25% decrease in top speed, which will be fine by me. This will be easier on the motor, but will it also be easier on the battery?

Also, I remember from back when I was shopping for my Revo conversion motor that a lower kv motor was better for monster trucks. Going from the 1850 9XL to the 2200 CC-Neu seems like a big jump upwards.

Loa

[Arct1k]

The cc2200 is a much better motor and will be fine on 4/5s - It actually runs ok on 6s for bashing and I've run ok on 2s for training my son...

[loa]

Thanks.

Before I place the order on Mike's store: do I need the mod1 pinions? And if so, will those pinions work on the CC Neu 2200?


Loa

[loa]

Er, is there a pact of silence on the mod1 pinion gears? Every time I ask a question I get great, instant answers here.

But I asked the pinion question twice and got no answer! :-D

I just don't know the difference between a regular 5mm and a mod1 5mm pinion.

Thanks

[Bondonutz]

If your running a converted Revo with the stock spur gear then yes a Mod1 pinion is what you'll need.

[bryan]

MOD1 is the pitch of a gear 5MM is the motor shaft diameter.

[loa]

Thx for the confirmation. Pinion and spur ordered!

Loa