Is the timing for one brand the same for all the sizes of that brand? I have a turnigy motor for my genesis and its a 4074 set to 15 degree now I have a smallerone same manufacture but its 2084 something like that so is the timing going be be the. Same

It depends on the wind of the motor D or Y, should tell you in the specs.

http://www.hobbyking.com/hobbyking/s...dProduct=17702
This is the motor

So they don't make all turnigy motors the same wind

well i took the boat out and i changed the timing from 7.5 then worked up to 15 and no change in speed or heat everything is cool but the boat isnt as fast as it was with the stock motor that is the same specs.. any one?????????????

Well, i would lower timing to 10 degrees and put a bigger prop on. 4400kv with a max voltage of 7.4 gives you no room but should use a smaller boat and a big prop. You did mention that all was cool after running with no speed increase.

yes its the stock motor specs but just changed brands and it is for a small boat its the dragon shark 650 the stock prop is 436 and i just bought a metal x437 havent put it on yet but was just testing the boat out for the new motor swap

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no its not for the genesis sorry its for the shark its a XK2850-B-4400KV

Ok, i went looking for the original motor for the shark-2858-4500kv and found nothing for a 7.2 lipo. Try Exceed boats as i think theirs has a 4122kv but don't know the rest of the #'s. The 2858's can use 7.2 for 4500-5400 lipos which you know already.

That exceed boat is the one I messed up the stock motor and bought the turnigy one

i see what your saying so what prop can i use to get my speed back then? bigger? http://www.nitrorcx.com/99b-10021-650-ep-artr.html the stock is 4122kv and the one i got is 4400kv i messed up getting it thinking it was the same what can i do. i use 2s 5000mah pack would it be ok to run 3s

I was reading a post here on this site where a 2900kv was used but on 3S. Page 2 by Grimguard. Figure that 2900 x 11.1 x.90% = 28711rpm on your 436 metal prop. Lipo weight 2S for the 2858 motor should equal 2900 motor on 3S so self-righting works correctly, hope you follow me. Read the page 2 first before jumping. 4400 try a one size up in prop size first for heat of motor and esc first, ok=ok=ok!

i was running 3s 5000mah from stock no prop change and was fast but burned out the bearings in the motor. so self righting is set for 3s no problem. also i was checking my other boat also exceed sword and the stock motor is 2848-2636kv and i bought a new motor also thinking it was the same Eurgle 2848 2580kv and the boat isnt as fast either any help on that one if you can, prop change? up or down? about to look at the page you suggested also

ok mike i see so i should be ok with 3s and my x437 prop will try out soon. thank you for all the help guys,mike if you have any info for my last post or opinions please let me knoe ill try

4400 kv on 3 s equates to 40,000 loaded rpm,your gonna burn it out,you should be going with less kv on 3 s ,thats a 2 s motor in my opinion.
Mart

Your right so what now bigger prop? On 2s

I would try the 436 on 3S and run a minute and check the heat. Last night, i checked the Shark and Exceed models and the picture had 650 and in same caption, the size of 650 was 23" and thought what the H*** is going on as most models say 650 = 26" not 23".. BTW thanks for the private message. Thought you should know as were friends in private. Try the 436 on 3S and let me know, ok.

Ok sure will try it thanks again mike . Will post on the outcome

Well took the boat out today and it ran good with the x437 prop and 3s and motor and esc was warm didn't bring my temp gauge so don't know if it was too hot ran for about 5min or so will test again with temp gauge if too hot should I go smaller on prop? What's too hot for esc and motor?

timing was set to 7.5 i guess i could drop it to 3.whatever