Noob questions about what motor/esc combo

[vag_nutter]

Ive got a kyosho dolphin2 outboard and want to set it up with a brushless, wjat motor and prop should I use?

[Simon.O.]

Ive got a kyosho dolphin2 outboard and want to set it up with a brushless, wjat motor and prop should I use?

This is going to depend on so many variables.

What boat will it go on ?
Are you looking for outright speed or to have a fun boat with good run time.?
What battery packs do you have now if any ?

I have the Academy OB and run it on the F1 tunnel so I know the outboard that you have. I had a Kyosho one a while ago too.

If you have a photo of the boat that would be good or at least a name or model of the boat that you have.

The more info that you can give the better the advise that you will recieve.

[vag_nutter]

I was going to run it on a hot shot tunnel hull for now, I just want something that is quick and fun, dont have any lipos atm, just nimh

[Simon.O.]

The hot shot tunnel is 27" long if it is the one I think it is.

For fun you could go with a S size BL motor with a 1/8"shaft that will be a direct bolt on to the existing OB unit.
Then grab a Mystery 100A off e-bay and run 6-7 Nimh cells to it.

If you are going to go with brushless then I can strongly reccomend that you go lipo too, unless you have some very good Ni cells and the will to care for them.
It took me a long time to go BL and even longer to go Lipo. Now I do not look back.
The price of the higher power systems is so low these days that is it is a no brainer to go BL+Lipo.

If you must stay with Nimh then go for a 8S and feed it with 6-8 cells
If you choose to go Lipo then go with a higher wind (12S) and use 3S Lipo.

These are reccomendations based on what I have and run.
Hang about and I am sure there will be other ideas too.

[vag_nutter]

What size prop should I be swinging? I just realised your in nz aswell, who is the best place to get parts from locally

[Simon.O.]

If I were to run that hull on a S size BL Motor I would be looking at a 432 for kickoff. Do not give that OB too much stick as it will give it back.

Trust me If I had that hull the first thing to go would be the Kyosho leg.

Yes I am a Kiwi too.
Local supplies are a bit tricky.
When I can I will use High Performance Models in Browns Bay on the shore.
I get a few small bits locally on line from a variety of suppliers here in NZ.

Big items such as motors and ESC's and battery packs come from overseas.
OSE (here) is a good place for most of that the rest can be found online.
Search or ask and you will find.

[vag_nutter]

Will the kyosho leg not handle it? Ive got a spare k&b 3.5 lower unit it could possibly modify

[Blackjack-sven]

Will the kyosho leg not handle it? Ive got a spare k&b 3.5 lower unit it could possibly modify

If I'm not mistaken the K&B 3.5 is a nitro No? not sure how you want to modify this. Is there an adapter for this or are you thinking of making one? I ask because I have the K&B 7.5 and was thinking of doing something similar.

[vag_nutter]

Yea you can buy adaptor plates for them

[Simon.O.]

Yea you can buy adaptor plates for them

I believe you can buy adapter sets for K&B lowers.
When I ever get hold of one I will do the conversion myself.
With that lower you can easily run a S motor but you could also move up to the SV power package.

There are a bunch of threads here about tunnels. The VS-1 and TS-2 spring to mind. Find them and have a good read about OB conversion and suggested power setups.

You are going to be a bit higher than what I have experience in.