I'm getting one of these as a handout for tonight's enduro - 16ea. 5 minute heats and somewhere around 1100 laps...
change the brushes? change the springs? cut the trailing edge?
Pro Slot 4002FK motor question
Started by
MSwiss
, Dec 28 2014 10:14 PM
64 replies to this topic
#51
CoastalAngler1
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Posted 08 May 2015 - 10:06 AM
Charlie McCullough
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#52
Pablo
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Posted 08 May 2015 - 10:26 AM
Lots of info on these motors, Charlie. Just read the threads.
Paul Wolcott
#53
gotboostedvr6
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Posted 08 May 2015 - 11:26 AM
Have you had problems with starting or needing push starts?
If not leave the face of the brush that touches the comm alone.
Radius them @.170
These things need to be heat cycled so run the motor in very well before the race.
They like gold dust brushes and ligher spring tension.
If not leave the face of the brush that touches the comm alone.
Radius them @.170
These things need to be heat cycled so run the motor in very well before the race.
They like gold dust brushes and ligher spring tension.
David Parrotta
#54
Pappy
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Posted 02 June 2015 - 07:33 AM
I didn't read all the post's in here so this question might already have been asked and answered.
What does the FK stand for in this motor? 4002FK
It's obviously not an FK motor like a Falcon 7 or Retro Hawk.
They started a new flexi race at the Tri State Raceway just north of Hamilton, Ohio and any FK motor is legal, even the 4002FK.
Jim "Butch" Dunaway
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#55
Zippity
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Posted 02 June 2015 - 07:46 AM
It has the same winds as the F7 I believe 
Ron Thornton
#56
MSwiss
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Posted 02 June 2015 - 07:56 AM
When the Falcon 7 was unavailable, the IRRA® opened up submissions for new FK motors.I didn't read all the post's in here so this question might already have been asked and answered.
What does the FK stand for in this motor? 4002FK
It's obviously not an FK motor like a Falcon 7 or Retro Hawk.
They started a new flexi race at the Tri State Raceway just north of Hamilton, Ohio and any FK motor is legal, even the 4002FK.
Proslot apparently thought if they included "FK" in the stock number, we would consider it for approval.
Mike Swiss
Inventor of the Low CG guide flag 4/20/18
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990), eight G7 main appearances
Eight-time G7 King track single lap world record holder
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#57
Pappy
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Posted 02 June 2015 - 01:02 PM
From what I've seen it is faster than a Retro Hawk in a flexi car.
Jim "Butch" Dunaway
I don't always go the extra mile, but when I do it's because I missed my exit.
All my life I've strived to keep from becoming a millionaire, so far I've succeeded.
There are three kinds of people in the world, those that are good at math and those that aren't.
No matter how big of a hammer you use, you can't pound common sense into stupid people, believe me, I've tried.
#58
MSwiss
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Posted 02 June 2015 - 01:52 PM
If we would of suspended disbelief and considered it an FK, it would of surely failed as being too fast.
Mike Swiss
Inventor of the Low CG guide flag 4/20/18
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990), eight G7 main appearances
Eight-time G7 King track single lap world record holder
17B West Ogden Ave., Westmont, IL 60559, (708) 203-8003, mikeswiss86@hotmail.com (also my PayPal address)
Note: Send all USPS packages and mail to: 692 Citadel Drive, Westmont, Illinois 60559
#59
idare2bdul
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Posted 03 June 2015 - 01:52 AM
No it's not an FK motor based on the endbell and brush design. That said if the armature is essentially the same and the magnets Gauss the same and if the pricing is competitive there is a strong argument for making a motor legal that let's you see the brush wear and even see if their is reasonable spring tension. One of the main things I've noticed from testing and watching on track performance is that these motors once broken in seem to run pretty equally. They can be fussy to break in. Any organization is entitled to make up it's own rules and rules can and usually are arbitrary, so use em or not. So far we like them in scenic North Carolina.
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#60
Michael Jr.
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Posted 03 June 2015 - 12:01 PM
We have a lot if these on the track here. Many prefer to run these even in 16D races. No one has described a push issue here and the motors get a lot of laps. The 4002FK has a solid reputation at Upstate. Drag racers are using it too.
#61
SlowBeas
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Posted 03 June 2015 - 03:38 PM
Isn't this motor a c-can?
Jim Beasley
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"Assuming either the Left Wing or the Right Wing gained control of the country, it would probably fly around in circles."
- Pat Paulsen, 1968
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#62
MSwiss
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Posted 03 June 2015 - 04:07 PM
No, it isn't.
Mike Swiss
Inventor of the Low CG guide flag 4/20/18
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990), eight G7 main appearances
Eight-time G7 King track single lap world record holder
17B West Ogden Ave., Westmont, IL 60559, (708) 203-8003, mikeswiss86@hotmail.com (also my PayPal address)
Note: Send all USPS packages and mail to: 692 Citadel Drive, Westmont, Illinois 60559
#63
Gator Bob
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Posted 03 June 2015 - 04:15 PM
F-Kan.... ? 
A,B,C,D and probably E are taken. 
Bob Israelite
#64
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Posted 13 July 2015 - 03:42 PM
I ran a new FK this past Saturday on a King. It was in a LMP car with a JK C-21 chassis. This was also the first time I had built a car in maybe 15 years as well. I was rusty, it was rusty, My old external resistor controller was acting up, ect, ect. Finally worked some bugs out of the car, borrowed a controller, and was able to turn some clean, if not fast laps. I was geared 9/31 with .825" tires. The motor ran a little hotter than what I would have expected. And it did fail to restart twice, in the same corner both times. First time, I wasn't paying closed attention and held the trigger down for a few seconds and the motor AND controller (Parma Turbo) started to smoke. It also had what used to be the "death" smell. So I figured I might as well run it as I expected it to go up in smoke within a couple of laps. It never did. Probably put another 50-60 laps on it and it seemed fine, except for failing to restart one more time. This is the same experience a buddy of mine had on his first FK but on his 60' 4 lane that we recently built. I think I'm going to trim the brushes as described and try to do a proper break-in and see what happens. I really like the little motor. I hope the restarting issues can be resolved.
Mack Johnson
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#65
Uncle Fred
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Posted 14 July 2015 - 12:28 PM
I ran a new FK two laps in an Retro F1 and it slowed. I ran the motor on a power supply and sparks shot out of the bushing, clearly a short. Could it be the end bell or just a bad arm?
Fred Correnti
