Pikes Peak, Cromotor or 5404/5403?

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Pikes Peak, Cromotor or 5404/5403?

Postby cbr shadow » Mon Jul 30, 2012 9:41 am

I'm finishing my etrke build now which has an HS3540 and 24s3p of lipo. I'm toying with the idea of another build for next year's pike peak race just for a fun project to work towards. Anyways, which would be the best hill climbing hub motor? I'm definitely sticking to a hub motor not mid drive, stoke monkey, etc etc.. Cromotor or 5404/5403? Propbably going for a 20" wheel. This is more of a fantasy build at the moment since I'm not starting on this project for a while.
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Re: Pikes Peak, Cromotor or 5404/5403?

Postby neptronix » Mon Jul 30, 2012 12:55 pm

50mm magnet motor ( hubzilla ) or 40mm/30mm magnet motor ( crystalyte )...
Hard choice, huh.. ;)

And of course you want a 20 inch wheel in any situation. The smaller the wheel, the better.
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The all-arounder: 8T MAC motor on a Trek 4500.
The girlfriend bike: 350W front MAC on a 700c Trek.
The wheelie machine: 20" Rear Magic Pie II on a Trek 4300 MTB
The Bus: ??? on a 'da bomb' cargo bike frame

Pro-tips for noobs: Charge RC Lipos to 4.15v, stop discharging at 3.5-3.6v | Use torque plates/arms! | Rear mounted hubs are always best
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Re: Pikes Peak, Cromotor or 5404/5403?

Postby MadRhino » Mon Jul 30, 2012 2:49 pm

For heat dissipation, I'd go for the bigger and heavier X54
In a 20" wheel I'd prefer the 5403, but I believe the 5404 in a 34" wheel would do it as well
Make it fool-proof, and I will make a better fool.

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Re: Pikes Peak, Cromotor or 5404/5403?

Postby Farfle » Mon Jul 30, 2012 3:19 pm

I would choose the Cro, hands down. More motor in less box, but yeah, smallest wheel possible, a 14" moto wheel with JohninCR's asymmetrical cooling holes would work the best. Use voltage to get the speed back. if 100v isn't fast enough, grab a high fet count 4115 controller, mod it out and run it at 30s. Check out zombiess work.
The race bike:
24s5p 50c nano tech
Badass custom mofo outrunner 205x177mm 26kv
Peak power in : 420A at 87v
Peak power out: 34 Hp and 105ft/lb

Build to last...
"It will be assaulted by the elements, It will be ravaged by time and it will be destroyed by the user. BUT, if you Stick to the little rules: K.I.S.S., Overbuild everything, and test, review, revise, repeat. It will last"


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Re: Pikes Peak, Cromotor or 5404/5403?

Postby neptronix » Mon Jul 30, 2012 3:51 pm

Farfle wrote:I would choose the Cro, hands down. More motor in less box, but yeah, smallest wheel possible, a 14" moto wheel with JohninCR's asymmetrical cooling holes would work the best. Use voltage to get the speed back. if 100v isn't fast enough, grab a high fet count 4115 controller, mod it out and run it at 30s. Check out zombiess work.


^--- yep
30S on my magic pie in a 20" wheel ROCKED. And that's less than half the motor that the cromotor is... :)

A cromotor in a 14" wheel on super high voltage ( 30S-32S or maybe even higher ) would have you at the top of pike's peak next year, in awe of the beauty of the rockies around you.. wondering if there are any steeper climbs out there on this planet because what you just scaled seemed too easy :)
ES facebook group: https://www.facebook.com/groups/125035107565566

The all-arounder: 8T MAC motor on a Trek 4500.
The girlfriend bike: 350W front MAC on a 700c Trek.
The wheelie machine: 20" Rear Magic Pie II on a Trek 4300 MTB
The Bus: ??? on a 'da bomb' cargo bike frame

Pro-tips for noobs: Charge RC Lipos to 4.15v, stop discharging at 3.5-3.6v | Use torque plates/arms! | Rear mounted hubs are always best
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Re: Pikes Peak, Cromotor or 5404/5403?

Postby John in CR » Mon Jul 30, 2012 5:06 pm

Neither if it's a DIY trike and not limited to small weak 10mm flats...that is if you're after real performance. Those motors sure when you're subject to the limitations of stock bikes, but if you're not subject to bike limitations, why be subject to the compromises necessary to fit a bike if you want a small wheel anyway?
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Re: Pikes Peak, Cromotor or 5404/5403?

Postby Farfle » Mon Jul 30, 2012 5:11 pm

John in CR wrote:Neither if it's a DIY trike and not limited to small weak 10mm flats...that is if you're after real performance. Those motors sure when you're subject to the limitations of stock bikes, but if you're not subject to bike limitations, why be subject to the compromises necessary to fit a bike if you want a small wheel anyway?



agreed, the scooter hubbies are in a different class. the cromotor is on the wee small end of that class, the motors johnincr messes with are the mid/high end of that class.
The race bike:
24s5p 50c nano tech
Badass custom mofo outrunner 205x177mm 26kv
Peak power in : 420A at 87v
Peak power out: 34 Hp and 105ft/lb

Build to last...
"It will be assaulted by the elements, It will be ravaged by time and it will be destroyed by the user. BUT, if you Stick to the little rules: K.I.S.S., Overbuild everything, and test, review, revise, repeat. It will last"


Team Farfle blog!! http://www.farfleselectrics.blogspot.com
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Re: Pikes Peak, Cromotor or 5404/5403?

Postby John in CR » Mon Jul 30, 2012 7:17 pm

Farfle wrote:
John in CR wrote:Neither if it's a DIY trike and not limited to small weak 10mm flats...that is if you're after real performance. Those motors sure when you're subject to the limitations of stock bikes, but if you're not subject to bike limitations, why be subject to the compromises necessary to fit a bike if you want a small wheel anyway?



agreed, the scooter hubbies are in a different class. the cromotor is on the wee small end of that class, the motors johnincr messes with are the mid/high end of that class.


Of course a tadpole that wheelies might be a problem. :twisted:
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