there must be a problem?

[crazee horse]

Right, my basically stock wraith runs 23/80 . I've just installed an ezrun 13.5 2500kv motor and a 60 amp v2 ESC. Its proper slow. Id have thought this would have run rings round the stock 20t. I'm currently running 2s 5000mah. I've always been led to believe a warm motor runs best. My motors have never ever gotten warm. Not even tepid . I've stripped it and everything but I can't find any problems.
If I crank up my timing on the ESC will this give me much more speed?

[tozrovr]

Originally Posted by crazee horse

Right, my basically stock wraith runs 23/80 . I've just installed an ezrun 13.5 2500kv motor and a 60 amp v2 ESC. Its proper slow. Id have thought this would have run rings round the stock 20t. I'm currently running 2s 5000mah. I've always been led to believe a warm motor runs best. My motors have never ever gotten warm. Not even tepid . I've stripped it and everything but I can't find any problems.
If I crank up my timing on the ESC will this give me much more speed?

Dumb question, but did you calibrate the ESC to your RX?

[crazee horse]

Yes sir.

[Solitaire]

Hmmm, not a lot of replies.
Does it run faster in reverse?

[crazee horse]

Nope .

[Jay-Em]

2500kv is dismally slow whichever way You look at it. It's 18000 rpm at 7,4 v at best, while the 20t is already a 3000 kv...
So, if You want to go faster than the stock motor, any motor abóve 3000kv will be an improvement. Say, a 3300kv, or a 4000kv.

I hope You realize that "Kv" stands for the rpm per volt?

[Natedog]

Originally Posted by Jay-Em

2500kv is dismally slow whichever way You look at it. It's 18000 rpm at 7,4 v at best, while the 20t is already a 3000 kv...
So, if You want to go faster than the stock motor, any motor abóve 3000kv will be an improvement. Say, a 3300kv, or a 4000kv.

I hope You realize that "Kv" stands for the rpm per volt?

Or run 3s or 4s and gear up.

Motor does not need to be warm at all....electrons flow better when it's cold.

[muddawg]

the lower kv will give you more torque. if your motor esc combo will allow it up your voltage and you'll get more speed and torque from your existing combo

[crazee horse]

Originally Posted by Natedog

Or run 3s or 4s and gear up.

Motor does not need to be warm at all....electrons flow better when it's cold.

i was told that it would be a better choice because of the low 2500kv it would be very torquey, never realised it would be so slow.
have been told to ..
1, volt up
2, gear up
3, shut up(lol)
4, advance the timing
im really not sure..................
either way all this experimenting is getting costly.
ive tried
axial 20t,
axial 27t
ansmann 21t
traxxas titan 12t which was nice but didnt last,
traxxas 21t reverse rotation
13.5t 2500kv.................
i love the truck but ive said before if i cant sort it soon its gotta go.

[crazee horse]

Originally Posted by muddawg

the lower kv will give you more torque. if your motor esc combo will allow it up your voltage and you'll get more speed and torque from your existing combo

but will it be enough ? i want to be able to easily thrash a stock wraith.

[Meatwad]

So you're prepared to get rid of the truck because you can't work out the gearing for it?

Either volt up or gear up, pick one.

[Hoosierdady]

get you a 32p 15/54 combo

[zjguy721]

Go 3S. It'll increase your rpms by 50%, and you can always gear it back down a bit.

[Harley]

Originally Posted by crazee horse

i was told that it would be a better choice because of the low 2500kv it would be very torquey, never realised it would be so slow.
have been told to ..
1, volt up
2, gear up
3, shut up(lol)
4, advance the timing
im really not sure..................
either way all this experimenting is getting costly.
ive tried
axial 20t,
axial 27t
ansmann 21t
traxxas titan 12t which was nice but didnt last,
traxxas 21t reverse rotation
13.5t 2500kv.................
i love the truck but ive said before if i cant sort it soon its gotta go.

So instead of going with any of the suggested setups in the Sticky you have wasted a bunch more money and still aren't happy.

[Hoosierdady]

Use the sticky. So many people on here have done so without issues. Each person is looking for a different setup than the guy next door. But the bottom line is, there are only so many configurations that will work and work well. Guys have spent months if not years developing these threads to help us newcomers along in the decision making process with these Wraiths'. If you're not ready for 3S, gear up. It's only going to cost you maybe $10 to put a set of 32p gears in that rig.

[crazee horse]

Non of the set ups in the sticky are what I want. I don't want big torque, just enough to get me out of small problems, I want a bit of acceleration and speed for trails. Not interested in drag brakes either. I bought the wraith because it looked way better than it is. Its a good truck , just needs personalising. I want more FOFF .

[Jay-Em]

I think the VXL you're about to try, will be in the ball-park

[Hoosierdady]

Originally Posted by Jay-Em

I think the VXL you're about to try, will be in the ball-park

X2. thats what I run in my FOFF, vxl on 3S. Plenty fast for anything offroad.

[Natedog]

Originally Posted by Jay-Em

I think the VXL you're about to try, will be in the ball-park

That thing was always thermal shutting down in my Slash 4x4 on 3s....and in the summer even 2s would over heat it and it was geared properly...not sure weight difference between Wraith and Slash 4x4 as I sold my Slash. Mamba Monster was very nice and never thermalled.

[zjguy721]

think your problem comes down to some simple math. Start with the battery (input voltage). Goes through your ESC (can it handle it). To the motor (what is the kV rating, gives you rpms per input volt), through your trans, into your final gear reduction, and to the wheels.

Say you even switch to a 3300kV motor, you will see an increase in wheel speed of 32% (in theory, you will lose a little due to other things). Going from 2S to 3S will increase it 50% (input voltage). The idea of volt up and gear down is what most of us use, because you can gear for speed with the higher rpms, and still have some low end grunt as well.

If you're running a 2S on a 2500kV motor, you're only turning 18,500 rpms (average). Go up to 3S and a 3300 kV motor, you're turning 36,630 rpms, or in theory doubling your top speed.