E- revo gearing questions

You makee a mistake on the spur gear , the stock e-revo spur gear is 68T, mod .8.
So with your 4s li-po, gear it with a 23T 32pitch pinion, and you'll be in the 39-40m/h

On my e-revo, on 6s, with badland tire (5.85" OD) i'll use a 22T pinion.

Originally Posted by david lamontagn

You makee a mistake on the spur gear , the stock e-revo spur gear is 68T, mod .8.
So with your 4s li-po, gear it with a 23T 32pitch pinion, and you'll be in the 39-40m/h

On my e-revo, on 6s, with badland tire (5.85" OD) i'll use a 22T pinion.

Yeah i do know that 68T is the stock spur, but i was using a 54T spur that traxxas makes for the jato. Since a spur is cheaper than a pinion, i thought i would suggest another spur(~$3) instead of another pinion(~$12).

[crazyjr]

Originally Posted by ah-see

Yeah i do know that 68T is the stock spur, but i was using a 54T spur that traxxas makes for the jato. Since a spur is cheaper than a pinion, i thought i would suggest another spur(~$3) instead of another pinion(~$12).

that spur would be too small for anything Emaxx wise, you'd need a 28 to a 30 tooth pinion to get any mesh and the gearing would be too much for even the most powerful setups

[VintageMA]

From a few trials with the E-Revo, don't gear for 40mph with the stock tires. My first gearing was 24/68 on a 1515 running at about 30,000rpm geared for 35mph - at 35 mph the stock tires balloon enough (about a full 2" in diameter)to make the speed closer to 50mph+ and will drop your overall ratio tremendously and you will get some serious heat (got up to 180* on a 1515 in 10 minutes - a 7XL would become a griddle)

I just switched out to a 1515 running at ~36,000rpm on 6S and geared it at 18/62 with the Badlands MT (again ~35mph) and it was running much smoother and motor temps around ~130*.

The badlands do not balloon much at all. The Talons are cookie cutters - if you gear for 40 you're going to balloon close to 55-60mph gearing with the tire expansion.

I would say to gear up to closer to 30-32mph and with a little tire ballooning you'll be around high 30's. When you get better tires you can then gear back down to a 20-22T pinion.

The stock tire on my e-revo is in the garbage I've put half offset Ofna wheel with proline bowties MTR.
I've a Neu 1515 2.5d/f with 6s, gear 24/68 and i'am about in the 40/42mph range.
If i put y badlands on it, i switch for a 22T pinion to campansate for the extra .15" diameter and weight.

[VintageMA]

Originally Posted by david lamontagn

The stock tire on my e-revo is in the garbage

I'm going to ebay mine to some poor schmoo along with the titans, esc, radio and receiver.

Originally Posted by VintageMA

I'm going to ebay mine to some poor schmoo along with the titans, esc, radio and receiver.

Ya i said " in the garbage" but in reality, i've sell it for $40.00 to a friends ( no, my firends is not a garbage)

And all my stock electronic (motors, ESC, Tx + Rx and servos) is ever sold to another of my friend for $110.00.

So my e-revo, with both taxes and shipping is at my door for exactly $382.16 CAD

[VintageMA]

Originally Posted by david lamontagn

I've a Neu 1515 2.5d/f with 6s, gear 24/68 and i'am about in the 40/42mph range.
If i put y badlands on it, i switch for a 22T pinion to campansate for the extra .15" diameter and weight.

Same motor/bat setup as me, but I dropped the spur to 62 to make use of the low-CG mount. I feel I could go up from 18/62 to 20/62 with now problems as well with the badlands tires. That puts me at the same ratio as you with th 22/68.

That just feels like a nice range for a MT. No need to try and go 50 in a truck..... More fun to go a little slower and use it on the bumps like it was made to do.

Same motor/bat setup as me, but I dropped the spur to 62 to make use of the low-CG mount. I feel I could go up from 18/62 to 20/62 with now problems as well with the badlands tires. That puts me at the same ratio as you with th 22/68

What did you want to mean by low-CG mount??? You put your Neu on the front of your truck to the place of the rear???

Originally Posted by crazyjr

that spur would be too small for anything Emaxx wise, you'd need a 28 to a 30 tooth pinion to get any mesh and the gearing would be too much for even the most powerful setups

I stand corrected.

Originally Posted by crazyjr

that spur would be too small for anything Emaxx wise, you'd need a 28 to a 30 tooth pinion to get any mesh and the gearing would be too much for even the most powerful setups

This is a quote from Zinno from the traxxas forums:
http://monster.traxxas.com/showpost....00&postcount=4

"For 2x 550 setup, the info is in the manual. For single motor mount, the range is HUGE:

High CG motor position:
54T spur: 11 - 36T
56T spur: 9T - 34T
58T spur: <= 32T
62T spur: <= 28T
65T spur: <= 25T
68T spur: <= 22T

Low CG motor position (or alternate "big" motor mount):
54T spur: 12T - 29T
56T spur: 10T - 27T
58T spur: <= 25T
62T spur: <= 21T
65T spur: <= 18T
68T spur: <= 15T"

What's "big motor mount"??? Is a Neu is consider to be a big motor??

So if i understand, if i want to run the stock 68T with 22 T pinion i don't have any choice other than put it on high CG??

[e-mike]

wowow..if i want to use the 68 spur and a 20t pinion i can not use on low cg position

Exact my blueberry friend
That's for this reason that i've order a 62T spur with a 20T and 21T RRP pinion.

[hoovhartid]

Originally Posted by david lamontagn

What's "big motor mount"??? Is a Neu is consider to be a big motor??

So if i understand, if i want to run the stock 68T with 22 T pinion i don't have any choice other than put it on high CG??

The neu 15XX uses the same size mounting as the titans,... that can be used in the low and high CG mounting places. The Big motor mounting option is well......bigger...Its for 29-30MM set motors like this;
http://www.hobbycity.com/hobbycity/s...hless_Inrunner

Also Don't worry about the term "high CG". It's all of about 4mm higher than the other one. I think the only point of the two different smaller mounts is to give more gearing options. Still way lower CG than the e-maxx mount.