What's a better prop for sport running?

[Stinger9D9]

So far the props I have tried on the Motley Crew are the stock prop (of course), a detongued x642, a Grimracer 40x52/3, m445, Grimracer 42x55, Prather 220 and OSE Glass filled 45mm.

The m445 was probably the fastest - because when I ran the x642 I was running a blue can (about 1600kv) Supervee (waiting for a stock motor replacement). Considering how warm stuff runs (on the actual 1800kv stock motor) with the m445 I think the x642 may really ratchet the temps up there.

I like the 40x52/3, it just seems smooth and nice in the turns, but it's not that fast.

I was running the 42x55 today quite a bit, the boat looked pretty buttoned down, but I did have a blowover (caught a crosswind) so it must have been hauling pretty well. Everything kept nice and cool with that prop though, with an outside temp of 94F, the motor didn't even hit 120F. With the amount of wind today, the m445 would not have been usable.

Then I tried the Prather 220. It reminded me alot of how it ran on the SV. Nice and quick, while seemingly keeping the front end down. Once you really laid into it though, it still got up enough speed to really pick the nose up.

So far I guess (because I haven't tried the x642 with the stock motor) the m445 is plenty of prop. I really like the 42x55 though - I also like how cool everything runs with it.

[jeepme]

Stinger are you still running the stock strut depth?? I raised my strut a bit with the M445 and it cut my temps down a bit and the speed was still better than the 42x55. Motor was 115* speed control 113* and packs where 125-130*. The only thying that really gets warm are my EC5 plugs, they are 150-155* I ve never seen anyone post plug temps so I dont know if thats good or not. Anyone know what exceptable plug temps are???

[babflyer]

thats sad to hear as I just invested in a bunch of ec5 plugs. I have been haveing deans and traxxas plugs get so hot they desolder. The plugs are always the warmest stuff in the boat after a run. It was my first time trying out traxxas plugs. I hate them and think they difficult to solder, I think they would be nearly impossilbe for a new rc'er and pluging them in is down right dangerous. I kept imagining what would happen if I sliped trying to press the tabs into their receptacles.

[babflyer]

i liked the ec5 plugs, they get my vote over deans and deffinatley over traxxas

[jeepme]

i figured out my heat problem with the plugs. My battery wires are 12awg and the ESC battery leads are 14awg. I changed out the ESC to a seaking 120 which has 12awg wire and less internal resistance and now my temps are much cooler.