Mongoose CX 450 Builds

Sounds good.
Tha is about half the weight of the SLA equivalent then. SLA seem to weigh about 7.5 lbs (3.6kg)
 
Don't forget when you get the new controller you'll need to get the 36V throttle that goes with it. Your bike looks great. I wish I could ride something that small because it looks like a lot of fun. You should leave the wheels at 20". When you set it up for 36V you're going to notice a significant change in your top speed. Or what you could do is leave the rear wheel at 20" and put a 24" wheel on the front since it's set up for disk brakes. It would give it a kind of small dirt bike look.
 
lbz5mc12 said:
Don't forget when you get the new controller you'll need to get the 36V throttle that goes with it. Your bike looks great. I wish I could ride something that small because it looks like a lot of fun. You should leave the wheels at 20". When you set it up for 36V you're going to notice a significant change in your top speed. Or what you could do is leave the rear wheel at 20" and put a 24" wheel on the front since it's set up for disk brakes. It would give it a kind of small dirt bike look.
Click to expand...

I was thinking the same thing for the wheels and using this combo.

For the rear at 2.4in:

http://www.jensonusa.com/Bicycle-Tires/Odyssey-Chase-Hawk-Tire

For the front at 2.25:

http://www.jensonusa.com/Bicycle-Tires/Odyssey-Mike-Aitken-P-Lyte-Tire

I've already found the controller and throttle at tncsooters.com and an 8amp 36v charger on amazon. So now I just have to get $300 together for the 36v conversion. But i think I might hold off and upgrade the suspension and wheels/tires first. I can't believe how much im putting into an $80 bike lol! This ebike thing is an addiction.

EBS
 
Crap...... Just got off the phone with clean republic and currietech. Seems like for some reason I thought my new batteries had low voltage protection. They don't. :oops: The factory controller doesnt either. Looks like I'm going to have to upgrade to 36v first so my new controller can handle this issue.


EBS
 
Nice, love the way you have transformed the bike into a great looking build! It looks fantastic.

I am in the process of upgrading our stock Mongoose CX24v450 right now. I was under the impression that the stock controller would handle 36V, and I see a bunch of the eZip guys running the same motor (and I assumed the same/similar controller) going to 36V without a problem.

I just ordered 9s 15AH worth of lipo, so we will see! Otherwise, I guess a new controller and throttle are going to have to be ordered too.

What do you think about the torque loss with the 16T Southpaw? I am torn on installing one since I am 200 lbs and sometimes ride with my 70 lb kid on the back, which means I cannot pedal. At 24V with the stock 20T the bike can actually carry us to his school and back without issue, even from stops. I am thinking with the 16T that might be too much for the little motor to handle, even with taking it easy on the throttle. The easy answer is to stop abusing the poor bike like that, LOL.
 
Hello Maurtis,

Thank you for the compliments. The 16t would probably be to much for 24v. Im about 170lbs and it moves me ok, but i always pedal from a stop. You could possibly run the 36v motor on 48v for some real get up and go. But I'm not sure if the 36v is the same size or not. Im contemplating that myself. I dont really have the means to make a mount for any other motor. I will be going to upgrade to 36v next month with a 13t motor sproket. The biggest issue that im having right now is range. What batteries and charger you going to be using for your 9s setup?
 
I have also read that the stock controller will handle 36v. The only real issue that i see running the stock controller is think it only puts out 16a.

You might want to think of running this setup.

Controller

http://tncscooters.com/index.php?route=product/product&path=41_74&product_id=177

Throttle:

http://tncscooters.com/index.php?route=product/product&path=65_79_84&product_id=85

Or

http://tncscooters.com/index.php?route=product/product&path=65_79_84&product_id=87


EBS
 
The 36V motor is the same size as the 24V. However the 36V seems to have a lower rpm and less torque than the 24V. Like I've said before, try to stick with Currie components. If you put a controller on there that is too high amp it will burn up your motor. The newer Currie controllers limit the amount of amps that the motor can draw. If you do go 48V try to find a controller with a max of lets say 20 amps and a continuous of around 16. This guy does 48V mods to Currie bikes.
https://sites.google.com/a/madertechnologies.com/electric-bikes/. If you contact him he may be able to give you some tips.
 
The 30a Currie controller will work with the Currie motor. It will limit the amount of current going to the motor. It's just other brand scooter controllers that have issues.
 
Yes, that is the one I used. It will work fine. It will detect how much current the motor can handle and won't go beyond that amount. If you look at the different wattage and voltage Currie motors on tnc, you'll notice that they run at different Amps. Out of all 4 of them, the 24V 450W one is the best as far as power is concerned.
 
lbz5mc12 said:
Yes, that is the one I used. It will work fine. It will detect how much current the motor can handle and won't go beyond that amount. If you look at the different wattage and voltage Currie motors on tnc, you'll notice that they run at different Amps. Out of all 4 of them, the 24V 450W one is the best as far as power is concerned.
Click to expand...

Really?
 
Hi EBS,

Just to be clear more amps=more torques, more volt= more speed. Your motor will spin faster at 36 Volt then 24 Volt.

With the appropriate gearing for the same power output like 450 Watts, you gain slightly more torque for the same top speed at 36 Volt, but you need to use a lower tooth sprocket on the motor or a bigger sprocket on the rear wheel to keep this same top speed.

Otherwise with more volt and more amps you can fried your motor, Brush motor are not the best candidate motor to be overvolted.

Another great option for this ebike can be a 9C 2806 at 70 volt or so it gives you more torque in this 20" rim, more top speed if you need it with a quieter ebike.

Good day!
Black Arrow
 
BlackArrow said:
Hi EBS,

Just to be clear more amps=more torques, more volt= more speed. Your motor will spin faster at 36 Volt then 24 Volt.

With the appropriate gearing for the same power output like 450 Watts, you gain slightly more torque for the same top speed at 36 Volt, but you need to use a lower tooth sprocket on the motor or a bigger sprocket on the rear wheel.

Good day!
Black Arrow
Click to expand...


What if I went with a slightly different setup, use the 24v 26A motor and 24v controller vs my current 16A motor and controller. Increase my gearing on the motor. Would that effectively give me about the same speed as the 36v 16A setup?
This way I could have more ah in my battery box and increase my range over a 36v setup. I already went down to a 16t from 20t in the rear, and i have a 13t from 9t on the motor side coming in the mail. If the 24v 26A setup could handle this and run 20mph and be able to run 20ah in the box, I would be happy with that. Mind you i still pedal. What do you think black arrow?

EBS
 
EvoBikeShop said:
I have also read that the stock controller will handle 36v. The only real issue that i see running the stock controller is think it only puts out 16a.
Click to expand...

Wow, I had no idea it was that weak. I was under the impression it was a 30A controller... Depending on how the controller and motor handle the 9s lipo, I might have to pick up that 30A controller from TNC along with the new 16t southpaw. Thanks for the heads-up!
 
EBS,

On any EV (electric vehicle), the "gas" tank (range) is your battery pack, this "gas" tank is calculated in Watts-Hour.

As example a 16 Amps batteries pack at 24 Volt gives =16 X 24 = 384 Watts-hour and 10.6 Amps pack at 36= 384 Watts-hour then your "gas" tank is the same.

Without changing the gearing at 36 Volt you get a higher top speed, if you still go at 30 Km/h on both set up the range remain about the same.

The 24 Volt x 26 Amps = 624 Watts then your battery pack will be discharged faster, may be you can gain a bit more range with 36 Volt 16 Amps setup but the difference is very minimal. Even if you change the gearing I don't think that you get really more torque, like you expect at16 Amps and 36 Volt.

Only experimentation can answer this but on the "paper" you gain about nothing from one system or another in term of range and torque with the parameters you give to me.

Good day!
Black Arrow
 
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