39 replies to this topic

[gatormark]

Is there a sealed gr 12 motor out there like the hawk 7? We have been talking gr 12 racing but I don't care to get into the who spends more crap that this type of racing brings. If not,what is the best deal on gr 12 motors ie bang for the buck? pro slot,koford?

[gmpower]

Proslot 3000S sealed GR12 $34.00 not sure how available they are.

[Racer36]

Eagle shows the 3000S in stock. Have your raceway check it out.

[MSwiss]

The 3000S is a C can motor with a Chinese arm.(larger than a Hawk 7)

IMO, you would be better off using the 4012FK, which a minimotor with neo magnets and an American arm.

It is not sealed.

Possibly your raceway could contact Proslot direct, and purchase sealed versions.

But you are sort of defeating the purpose of using a motor with a large diameter, American arm, if you can't get at it, to retrue it.

Maybe you can work something out with them, to reseal them, during a rebalance of the arm/refurb.

[Markomatic]

How many sealed motors do you have to buy to get a good one? I have been racing a class that uses sealed motors but I have bought 5 at $13.00 a pop to find one competitive. That one will go flat in a few months worth of racing and you are off on the cycle to find another good one. Having one that you can rebuild with an American arm is more up front cost but it can last way longer with rebuilds and is usually more consistent.

[jimht]

5 at $13 a pop to get one that lasts a few months...  

[MSwiss]

The American arm thing ultimately didn't work out real well, for the IRRA®.

 

Guys with deep pockets, wound up with 50+, $50 motors.

 

You almost got to think, they wouldn't have the time, to put pinions on, 160 or 170, $13-$15  motors. LOL

[gotboostedvr6]

No sense racing sealed 12's. The guys that know how to rebuild them without removing the seal will have a huge advantage.

[Zippity]

A "sealed" anything motor is an oxymoron

[Samiam]

Mark,

 

Are you guys more inclined towards sealed motors or Gp-12? And are you talking Wing Car?

 

If it's sealed motors, go with the PS 4002FK. If it's Gp-12 speed, then you guys are going to have to bite the bullet and pony up for C-can motor programs. 

[Gator Bob]

How many sealed motors do you have to buy to get a good one?

 

The $64,000 question ... 13 bucks at a time.

Do the math ....

 

I think you are being optimistic on getting months of use. 3 to 6v rated FK motors won't live long at 12-14 volts.

 

Of course a tape sealed (tamper evident) version from ProSlot wouldn't be that big of a deal.

A crimp sealed (tamperproof) Mabuchi style FK wound in 29 wire would take a quantity commitment and probably exasperate the current inconsistency and lifespan situation.  

 

Right? 

[Markomatic]

I race two or three times a month so they can make a month or two. My first motor was good then wore out. Took 6 motors to not be last. Funny how you can race all 8 lanes, not come off and be last


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[Gator Bob]

Don't know ...

I just come off a lot and finish last. This saves me money on motors.

 

Wanna race?

[gatormark]

Yes we are wing racing on a 200 ft kingleman

[Tim Neja]

How many sealed motors do you have to buy to get a good one? I have been racing a class that uses sealed motors but I have bought 5 at $13.00 a pop to find one competitive. That one will go flat in a few months worth of racing and you are off on the cycle to find another good one. Having one that you can rebuild with an American arm is more up front cost but it can last way longer with rebuilds and is usually more consistent.

See--there is the "assumption" that is completely wrong!! Even with a motor that is "rebuildable"-- you still have to buy 5 to get ONE good one!! OR--- stuff a bunch of arms through a good setup to find that fast motor!! It's that same either way--about %20 of your motors will truly be fast enough to win races with---no matter if you start with sealed motors--or motors you can rebuild!! 

[Markomatic]

That has not been my experience. Once you get a good setup on a rebuildable motor it will last almost indefinitely. The good arm can be refurbished many times before the com is worn out. I find armatures are more consistent today. With a sealed motor not only do you have to buy many to get a good one but when that good one is worn out it is done. It may have a good arm but you can't do anything with it. My experience with sealed motors have been with mini Brutes so you can't even replace brushes when worn out. 

[Zippity]

Sealed motors can still be comm trued.

[havlicek]

 

Markomatic, on 13 Oct 2017 - 12:07 PM, said:

How many sealed motors do you have to buy to get a good one? I have been racing a class that uses sealed motors but I have bought 5 at $13.00 a pop to find one competitive. That one will go flat in a few months worth of racing and you are off on the cycle to find another good one. Having one that you can rebuild with an American arm is more up front cost but it can last way longer with rebuilds and is usually more consistent.

See--there is the "assumption" that is completely wrong!! Even with a motor that is "rebuildable"-- you still have to buy 5 to get ONE good one!! OR--- stuff a bunch of arms through a good setup to find that fast motor!! It's that same either way--about %20 of your motors will truly be fast enough to win races with---no matter if you start with sealed motors--or motors you can rebuild!! 

There's some truth on both sides here.  Both sealed and rebuildable motors can have cost and performance benefits, because there's more to what makes any motor fast than just one aspect, even if it's a MAJOR one like the armature...and even with *just* the armature, there's luck and variability playing roles in the "equation".  It's not like you can even test just the armatures and be 100% certain of finding a good one until you actually put it in a car and run it.

 

 

 

Sealed motors can still be comm trued.

No they can't, at least in any way that would likely be any good...but please elaborate.  Making such a statement without details carries no weight.

[MSwiss]

I've never seen one done in person, but you can true the comm on a sealed motor, and in theory, quite well, if the motor has the shaft coming out of both sides of the motor.

IIRC, a commercial one was sold, expressly for that purpose.

You remove the hardware on one side, and spin the motor in "V's".

 

You obviously have to figure out how to spin the arm, while keeping the set-up from rotating.

A specially designed cutting tool, also facilitates, it getting done.

[Bill from NH]

There used to be a drag racing site on the net with a simple name, such as John's Drag Racing or something similar, where the owner was a machinest. This site had photos of several tools the guy made to facilitate his drag racing. One of the more unique ones was a fixture that held sealed Deathstars while truing their comms. This site disappeared about 5 years ago, but I believe the guy was somewhere in the Midwest. When time permits, I'll see if I kept any paper copy photos of this site.

[Danny Zona]

There used to be a drag racing site on the net with a simple name, such as John's Drag Racing or something similar, where the owner was a machinest. This site had photos of several tools the guy made to facilitate his drag racing. One of the more unique ones was a fixture that held sealed Deathstars while truing their comms. This site disappeared about 5 years ago, but I believe the guy was somewhere in the Midwest. When time permits, I'll see if I kept any paper copy photos of this site.

I've seen a racer convert a RC com lathe over that would true the com on sealed deathstar motors.

That was a long time ago though.

[gotboostedvr6]

[MSwiss]

Sealed motors can still be comm trued.

  

No cat has been let out of the bag.

The subject has been dicussed, at least once, here, before.

And a picture of an actual rig, was posted, IIRC, by Zippity, or possibly, by one of the other N.Z. guys.

[havlicek]

Until I see it being done and can critique the process, it ain't happenin'. 

[Kevin Donovan]

There are plenty of good Group 12 motors available.
C-Cans and Mini Motors both.

If you want to run 12’s just run what they’re going to race at the NATS at Tracy Brown’s.
I’m sure he can point you in the right direction.