Motor suggestion 1/8 fiberglass modern hydroplane 40 or 50 size?

[MrUnlimited]

Guys,
I am converting my 1/8 scale hydroplane into Fast Electric but I see everywhere a 40 size used in 1/8 hydroplanes. My hull is somewhat heavier so I was thinking of using a 50 size 6 pole 1200kv motor on 8s in it: http://www.ebay.com/itm/SSS-Motor-56...3D282108782188
Or should I use a TP-motor 4070 4 pole 5Y 1250kv in it on 8s?

[Fluid]

A Kv of 1250 is way too high for 8S in a heavy 1/8th scale boat. Rpm will be too high and the prop required will be too small for decent efficiency on a big boat. A better choice would be between 850 and 950, this will draw fewer amps and allow a bigger prop which will pull the boat much better.

Without knowing anything about the boat it is tough to recommend a motor size. Most 1/8th scale racers use motors around 40x92 to 40x100 size, but a really heavy boat might use a 56mm size. Regardless, I would recommend the TP motors over the SSS products.


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[MrUnlimited]

OK zo the TP Power 4070 910kv on 8s would be a good choice. What prop should I run? X450?

[MrUnlimited]

Nobody has an answer what prop I should use?

[Todd Fleury]

I run a lehner 2280/9 in my 1/8th scale on 10s 1p. Swing an x452/3

[K.R.Joye]

I run NEU 1527 1.5y motors on 10S1P in my Scales using 50-52mm props. Meets both NAMBA & IMPBA (current) rules for 1/8th Scale power.