What am i doing wrong here?

[m4a1usr]

If the original video is indicative of your outings with that boat (no criticism, just observation) most of your heat issues are related to throttle position. Your upwind and downwind legs are too short before you are turning. In turns most of us go partial throttle and in the straight aways we go WOT. Your long legs are way too short. By my uncalibrated mk1/mod1 ole' eyeballs your going 60 to 75 yards and then turn in a 20 yard radius and begin it all over again. The only time our setups run at peak eff is WOT. Anything less and heat will continue to build in the motor and speedo. Just my dos centavos.

John

[dana]

I'll just hold it wot the whole time then... -)

[dana]

Ok guys, got out again today. 3 degrees timing, m445, 3 minutes wot. Came back motor 140, esc and batteries 120 ish. It's 85 here in mass... I dunno, I expected more from this motor. Maybe I should just go to a Neu. Any suggestions? What about the Leo running 4s with m645? Or 1515 2d or 1y on 5s?

[siberianhusky]

Interesting, today I ran a Castle 1512 1800kv in my Motley Crew, decided to give a x645 a shot. FAST!
Swordfish 120 esc. 4s
Temps were absolutely fine.
The runs with the lower amp draw are an x440/3.
Wonder if lower voltage would allow your bigger motor to run a big prop more efficiently.
The numbers from my runs today surprised the heck out of me!Capture.JPG

[Make-a-Wake]

Dont know why that motor is getting to 140* in late May..............

Is your temp gun accurate? Try the 5 second rule with your finger on the endbell, if you can hold your finger on there for 5 seconds before you have to pull it off then you are ok(thats about 130-135*) The boat looks plenty fast, any binding in the driveline? Is the cooling system pulling enough water thru..............you see the exit flow????

[dana]

Well I can hold my finger there, but I'm sure my temp gun is close. I was just offered a Neu 1515 1y for an awesome price. I'm thinking about going for it and running 5s on it, or 4s and a big prop. There's no binding whatsoever, it's just a heavy boat with them 5s packs, also a friend pointed out I have negative camber on my strut, so it's pushing the nose down a bit. Gonna try to give it some positive, maybe it will act less of a plow and temps will go down

[srislash]

A 1515 in that little guy? BTW I'm running a M645 on the MG with a 1515.Love to have another

[dana]

So this is a good idea? Lately I've realized that overpowering boats is cool, cause it keeps temps down. I have Leo 4074 in my df26, and it doesn't even get barely warm. So what cells you running and what kinda speeds lash?

[znus]

I ran a 646/3 on my Turnigy 4082 1600 kv (thats an Y-wind btw) on 6s2p in a little 32" r2hobbies GodSpeed cat. The motor was so cold I thought something else was wrong instead ESC was a little too hot though and I think it was because of what m4a1usr is talking about in his post above. It's hard to go WOT all the time. You run out of lake real fast at ~60 mph.

Didn't get to GPS it before the rudder came off at WOT. It was ripped out of the hull, screws, washers and all. Even the little brass saftey screw still was in one piece which led me to believe the speed itself was to much for the hull. If that was the case - I'm cool with it

Repaired it and GPS'ed it at 57 mph with a Prather 225, which in Octura language is something like a X/M 547. Still no heat on the motor.

Anyways, point is I have run a bigger prop than a m545 without heat issues, without any heat at all to be honest. If it's because of the difference between Y & D wind, 5s vs. 6s is beyond me. You shouldn't be able to fry an egg on your motor while I can use mine to get my beer cold.

[dana]

Dood, trust me I'm confused. This thing shouldn't have any heat issues. Maybe it's just a pos

[martin]

In the vid it looks like its running bow down to much & pushing the amps up.

[srislash]

So this is a good idea? Lately I've realized that overpowering boats is cool, cause it keeps temps down. I have Leo 4074 in my df26, and it doesn't even get barely warm. So what cells you running and what kinda speeds lash?

My bad then,the motors are the same size.I've been running 4s2p since early on I tried 5s and flipped it above 57mph somewhere(I hit 57 on 4s).So I concentrated on getting it stable and fast on 4s.I recently and successfully ran 5s but just rolled into the throttle,but it was good.No GPS or vid that day unfortunately.Here's an old vid http://www.youtube.com/watch?v=tzzKR8t9YUk&feature=plcp
I guess I'm due for an update.

[srislash]

In the vid it looks like its running bow down to much & pushing the amps up.

[Rumdog]

I'd bet it's a crappy motor.
The Neu 1515 is actually smaller than a 4082. That thing shouldnt be breaking a sweat like that in a Mean Machine.
I ran a CC/Neu 1518, 1800 kv on 5s in my 29"Sprintcat (same hull) Ant the motor stayed VERY cool. 90 degrees at most.

[Make-a-Wake]

Dana, I'd check and make sure the cog is around 29%..............then I'd make sure the stinger is not neg. Make it neutral at least, or a bit of pos.

Here's my first run with the 4082 2200kv on only 4s1p................check the ride attitude, nose up and riding on the pad. Its faster now with 4s2p.