Can motor timing

[Doozie870]

With the help of some great ideas from members here, I have refined a way to easily alter the timing on can motors with a large tubing cutter. (camera is on the fritz)
Place tubing cutter on terminal end of motor and gradually cut through the can, this will free the brushholder (endbell) assembly from the can allowing you to rotate it to whatever timing you choose, whether it be increasing advance for ccw or cw advance for counter rotating applications.Various motors will have different thickness of a plastic assembly that holds the brushes and goes into the can, if you cut it right,there will be enough left to hold the motor together while you test run to decide whats best, after you determine that, fix the can back together with solder or glue. I think you will find it wakes up a lot of motors,my highest so far is a 42% increase in KV (with 8x4 airplane prop load) over stock. as you can probably imagine you will need to either prop down or drop down in cells with these kinds of rpm increases. This is not legal for 700 spec classes as you are now running a modified motor.

[boater76]

So when you adjust the timing of the motor you are increase or decrease the rpms? How would you find out what is best for the application you are using the motor for?

[properchopper]

I think it's time to recognize "Dr." Doozie as the KING of 700 motors ! No one does it better ! :) :) :) :)

[Doozie870]

If you increase timing you gain rpms and power, not sure what the ideal position is yet , most can motors are advanced at 15-20 degrees, and Im running at the absolute max (rotated until the rpm stopped increasing), I would guess around 50 degrees, at this point the motor has the same power on 8 cells as it did on 12 in stock form. this is completly experimental at this point with airplane props, if anyone has tried this or would like to share any info that would be great. :cool:

[boater76]

Has anyone advanced the timing on the 700SC?

[Doozie870]

I have changed it on a variety of motors including 800s, with great rusults, I would suspect the sc would benifit as well.

[Doozie870]

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[Doozie870]

Not sure how to link vids, so Ill stick a few on rcflix, one stock, one wound up a bit (on the bench), maybe get it to run it in a boat today for the first time. :D

[SweetZ28]

That's a good idea... can do this on stock 550's and the cheapo 600's that come in the RTR boats and gain a little more RPM.

I would not go more than 30Deg though that would really be pushing it!

Probably 15 to 20 would be a good speed of RPM increase.

[Doozie870]

First altered motor bites the dust! was in a hurry to get on the water between rain showers,and forgot to change the prop, the x645 took its toll quickly, in a matter of seconds the comm was charcoal, lol. New armature installed, 215 prop on next attempt.

[Doozie870]

After several more com meltdowns, Ive convinced myself a 700 cannot take 12 cells regardless of the prop, (when wound up all the way), this may just end up as an quick way to get the power back for clockwise rotating applications. :o