motor temp?

[jlr3rd1]

so what is to hott for my supervee mtr??? running stock esc and 2s7.4v 3700 lipos. the prop is a cf45. after running a few laps the batts was 103 degrees , the motor was 145??? is that ok?

[Fluid]

It depends on where you measured it. For a motor of that quality I'd not want the endbell to get above 150F. If you saw 145F on the water jacket, your motor was too hot. High heat will weaken the magnets, lowering motor efficiency and stressing the ESC.



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[jlr3rd1]

wow thks i didnt know, and with the lipos my run time is alot longer. may be i will try a bigger water jacket and see if that helps ??? thks again for the info:)

[785boats]

What size prop are you running?

[jlr3rd1]

cf45 :)

[785boats]

Well it doesn't seem over propped (sorry I missed it on your first post) but you could try a K42 prop.
Is there a good stream of water coming from the outlet? If not, check for blockages.
Is the hull running wet? If so, raise the trim tabs a bit, or raise the strut a bit, or move the batteries back a bit. A combination of all three will air the boat out & reduce the load on the Motor/ESC.
A couple of pics of the rear of the boat would help people offer accurate advice.
Cheers.
Paul.

[jlr3rd1]

ok thks will get some pic.s

[Doby]

I run a K48 and temps are around 130 on the shaft.

[scooterP]

On my SV I'm running the Grim 42x55 two blade prop with 2 2s5000mah lipos. I don't have a temp gun, but I know my motor was barely able to pass the "5 second rule"......It was pretty darn hot. What I did to lower my temps were:
1. Put larger tygon water lines in place of stock

2. Opened up water inlet on rudder as well as drilled through and put a pickup in the bottom of the rudder as well.

3. I put a "T" fitting in the cooling system to split the flow between the esc and motor then another "Y" fitting in to bring both flows back into the same exit hole.

4. Lastly, I put on the OSE metal cooling jacket made for the SV motor.

I don't have water shooting out of the hull for 3 feet like what I have heard from others, but I have a nice steady flow no matter which way I turn......even at 1/2 throttle. Temps just stay warm now......and I don't worry about the cooling now.

[Eodman]

I found that if you take the cooling system apart - take a drill bit to all the metal openings on the connecting points you will gain a pretty good increase in flow!

These aluminum parts are quite soft as are the plastic parts so you can turn the drill bit by hand. Slow & easy and just a bit larger than the inside diameter - you will be pleasantly surprised with the increase! Inexpensive fix ... can do in 1 evening while watching the Yankees!

The secret is slow & patience!