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T-REX 600 › Better 450SEV2 motor? 2221-6 or 8?
08-06-2009 11:00 PM  8 years agoPost 1
Rogman88

rrElite Veteran

West Monroe, LA

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Time to upgrade! changing the stock motor out and am wondering which is better. Scorpion 2221-8 (3550kv or so) vrs scorpion 2221-6 (4400kv).
Also which pinion would I use for each? Im guessing 13T on 8 and 11T on 6.
Thanks for the input!

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08-06-2009 11:18 PM  8 years agoPost 2
outhouse

rrVeteran

auburn ca

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there isnt a better only your flight choices.

-6 is pretty much limited to 3s on a 11t and that will give some insane headspeed at the cost of 3.5 min flights.

-8 can run 3s and have plenty of power on a 13t or run 4s with crazy power as well.

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08-07-2009 02:24 AM  8 years agoPost 3
Ken4

rrApprentice

Singapore

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I use to run the stock 430XL (3700kv) on 13T and it gave me a crazy headspeed of around 3500rpm. Power was great, never bogged, but the downside is the heli is twitchy (always needing correction) and radix blades never tracked properly due to the slop in the seV2 grips. Now I am running on 12T and around 3200rpm, Heli is much less twitchy, now I feel more confident hovering inverted and I can go lower. And the radix blades are perfectly tracked (thin single line). My collective management is getting better now, so Im learning to adapt to my lower headspeed without bogging. And I always run 100% flatline on my stock BL35X esc (ungoverned). This is my seV2 on the 12T:

http://www.youtube.com/watch?v=N4dLuSaUUKE

I say go with the -8 on 13T.

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08-07-2009 03:59 AM  8 years agoPost 4
Rogman88

rrElite Veteran

West Monroe, LA

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OK I need better collective management because that was some impressive flying on the stock setup and I didn't even hear it bog down. Maybe I should hold off on the scorpion? Nah, still want more power to add to my better collective management!

Thanks for the input. I hope to fly like that one day!

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08-07-2009 05:31 AM  8 years agoPost 5
outhouse

rrVeteran

auburn ca

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if kens 430xl hit 3500rpm on a 13t it would be the first one. typical speed of a 430xl 12t is around 3000rpm and by the looks of his vid thats all he was flying with. great collective management and very smooth on the sticks. great flying ken

a -8 13t give you an average in between 3200-3300rpm and the 430xl is just a hair weaker then the -8.

a -6 11t at 100 flat might give you 3400rpm and you cant miss that headspeed

i dont know maybe kens running a 4S

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08-07-2009 07:47 AM  8 years agoPost 6
Ken4

rrApprentice

Singapore

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Nope im on 3S 2200 25c flightmax. But my mate flies with 4S 1750 25c Rhinos on his Beam, headspeed about 2900rpm and unboggable, best of both worlds.

http://www.youtube.com/watch?v=GPMNsNw_oL4

I will eventually move up to 4S also, once my 3S packs die which is I dunno when.

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08-08-2009 02:44 AM  8 years agoPost 7
McKrackin

rrProfessor

Lucasville,Ohio

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By the way...when did Scorpion cheap down their look?
I have been buying Scorpion for a long time and they are always nice and shiney gold and black.
I just got a couple Scorps recently and now they are a dull copper color and black.WTF???

Sorry about the off topic question but all the Scorpion banter got me thinking

I literally never use the word literally right.

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08-26-2009 04:16 AM  8 years agoPost 8
Justin Stuart (RIP)

rrMaster

Plano, Texas

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All the Scorpions I have bought are gold and black. The HK-2221-6 with a 12T pinion on a Trex 450 at 75% governed throttle gives about 2900rpm head speed and a 2200mAh pack lasts 4.5 minutes (with 1800-1850mAh put back in).

Avant RC
Scorpion Power Systems
Thunder Power RC
Kontronik Drives

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08-26-2009 08:25 PM  8 years agoPost 9
Git

rrVeteran

Brunei

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6 is rated higher than the 8 in terms of power output. i cant remember by how much.

my hk2221-6 is in transit to inov8tive for the 50% crash replacement offer so im now using my old ace rc 3500kv motor. after flying scorpion, all my other motors (align, ace rc and hacker) feels like brushed motor.

Alees Rush 750

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08-26-2009 09:00 PM  8 years agoPost 10
Ironhide

rrVeteran

dexter mi us

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The -6 is a bad Mother !!!! But 3.5 minutes is what you get !
My leg is shaking after 2mins .

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T-REX 600 › Better 450SEV2 motor? 2221-6 or 8?
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