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Get an IR temp gun and point it at the ends of the motor, at the batterys, and at the esc.
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A 447 is way to big for that set-up you overloaded the motor and esc. Even with the stock set-up a 447 is to big. I wouldn't run over a 445 stock and with a hotter motor you would whant to start with a 437 not 447 and if temps are ok try a 440 or maybe a 442. This is my guess anyway. Motors need to run in the sweat rpm zone and if you gear tham up to much you will actually loose speed and even smoke something like you did. A higher KV motor would need a smaller prop and some motors just run differently as far as speed and torque go. You need to start small and watch temps very closely like after every minuite or 2 with a new prop or motor till you see how its reacting to the changes. Then when you find the sweet spot
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Hey, SweetAccord grim never got back to me but I read this and thought of you http://www.rcuniverse.com/forum/m_7029385/tm.htm
If you whant speed here you go! It might cost a little more but it's FAASSST.Comment
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thanks dale. whats the temps on motor and speedo supost to be, max or dont exceed what? I think it was ctones is running the same set up that i have (ammo2300 lipos x437 typically 45-48mph) and im 10mph off? hes runing 2 turn funs one on each side so hes got more drag my trim tabs are maybe 2degs. down toward water. I just dont see whare my speed is lost?Comment
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Yeah, that was me...been offline 'til now.
Sorry to hear you burnt some parts. Everybody does though, even the best, most experienced racers.
I re-examined your pics after reading about the suggestion to shorten the water pickup...I agree with that point...there is waaay too much tube hanging below the edge of the transom, and that could be scrubbing alot of speed. I use the stock rudder pickup on both my SV's. opened a bit, bigger tubing, OSE jacket.
Also, it's hard to tell from the pics, but is it possible your rudder bracket is slightly misaligned? It looks slightly off canter in pic #2. I've seen many of these be askew after a rough tumble. Many of the screws need to be retightened every few runs.
Another thing you do different than me is the ESC settings. I set my Barracuda 125 at the lowest setting...not sure about the current limiter...I never adjusted that.
My tabs are nearly O Deg. - the right side tab is -1 Deg.
you can get a temp reader at most hobby stores, and nicer ones at hardware/electronics stores. Always check temps, especially when trying props. I check temps of motor/ESC/batteries after every run.
The m445 was too big for the Ammo, let alone the M447. Those props are pushing the stock motor, and that motor has a much lower KV and torque than the AMMO, and can handle bigger props. On the same prop the Ammo heats up the entire system more than the stock motor...IME.
Temps on motor above 150 are no good.
Temps on ESC over 120 are not good.
Temps on (Lipo)batteries over 140 are not good.
These are just guidelines, refer to manufacturer for specifications.
My entire system rarely sees over 100 Degrees...except batteries, but that's intentional.Last edited by Ctonez; 02-06-2008, 01:59 PM.Comment
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First of all your running SMC 2s 5000mah 20c lipo's right? Because I saw 500mah and 2c which wouldn't even move the SV. As far as your speed problem goes unless you got a bad motor to begin with I would say the only thing that could rob 10mph would be an allignment issue. Are you certain that the stuff tube is allmost perfectly aligned with the motor shaft and does it slide right into the coupler? Do you have different batterys to try? Are you ballancing your props? This wouldn't make that big of a difference but only use a light coat of grease on the flex and prop shaft don't pack the stuff tube full. Where are you running your boat? Is it perfectly calm all the time? Boats run faster in light chop or loose water! Hows your set-up, is your trim tabs or strut way down? Are you sure your gps is accurate? That boat seemed to be going pretty well in the vidio. Go for a ride in the car and check the gps acuracy just to make sure. If everything I mentioned checks out then I'de guess you had a bad motor or esc, but I doubt it. It's hard to trouble shoot a boat w/o seeing it in person. Good Luck!Last edited by Dale Koblitz; 02-06-2008, 02:26 PM.Comment
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the batts. are 5000mah. 22c 2cells per pack. i did check the gps in the car and still in the boat but with the lid off of the boat i will check the alignment both motor and rudder again i will say the grease was put in pretty heavy (stuffed) (AMSOIL#2 LITHIM COMPLEX heavy duty synthetic grease)also the picup tube is cut at a fairly sharpe angle so the intrance to the tube is right at the bottom of the hull ill posta pic but i work second shift so itll be late.Comment
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Thanks Dale Koblitz for thinking of me! Thanks for the info!Comment
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If you look at the pic's he had 5000mah.Comment
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heres a few more pics take a look see what ya think. just wondering has any one tried cutting the rudder down about half an inch off the bottom?Comment
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2 more.....Comment
Must have meant 5000mah I hope.
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