Power Suggestions please

[SJFE]

Guys I have a 25x10.5 ABS cat on it's way. Brushless is a no brainer but I am undecided on the motor.I have a brand new Hex 120 on the box so anything is an option. My first thought was a low turn S. What do you guys think?

[saleens7]

i would do an L size motor...maybe a few turns lower than the SV27 motor on 12 cells or a 4S lipo

[hammertime]

an 8l would probly work great

[hammertime]

what cat by the way??!!

[saleens7]

the dimensions sound similar to a bby scat cat 26

[hammertime]

a while back he sold his b/c he didnt care for it.....unless im mistaken........

[Diegoboy]

what cat by the way??!!

The cat I wanted

[Fluid]

That size cat is good for 8/12 cells/3S/4S LiPo. For 8 cell use the 8L would be a good motor, but for 12 cells/4S it is way too hot and too small. Get an 8XL for 12 cells, you will not be sorry. An S motor is really too small for anything but 6 cells/2S. Not enough torque and not enough mass.

I run an 8XL in my 27" car on 12 cells and a 7XL in the same boat for 8 cells. It is a fast sport boat (mid 40s on 12 cells), and I have raced it successfully.


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[SJFE]

It's an H2o cat. Thanks JT:) I was considering 12 cells but a 7XL on 8cells it is. :)

[Steven Vaccaro]

That motor and cell choice will work well. Should be very reliable. To get the most out of the 7xl you will need a high pitched prop.

[SJFE]

Point me in the right direction if you would please Sir. I havent really started my prop education yet. I am still trying to get this build and hard ware set up down. I can see why it takes years to get to the point where your self, Fluid, DJ and Doug are. It's alot to learn.

[Steven Vaccaro]

Its not easy for anyone. If you guess wrong its a motor, esc or batteries down the drain. Just like anything else you should start low and work up. I think you will settle on a x640 or x642. But that's a guestimate! Best thing to do is build your collection of props. What I did personally was buy a prop or 2 at a time. For the boats you run you will want x442 to x447. x637 to x645, m445 to m645. It took me about a year to get all the props I wanted in my box. But there are still more! :D

[Darin Jordan]

For the boats you run you will want x442 to x447. x637 to x645, m445 to m645. It took me about a year to get all the props I wanted in my box. But there are still more! :D

DEFINATELY... Like the three of four different variations of each of those props! Detounged... Cupped... Texas Cut... Barr Cut... Detounged a little more... Rakeds...

Read EVERYTHING you can find on the subject... Make yourself some tools (cupping pliers, files, peens, etc...), and then prepare yourself to destroy a few props along the way as you figure out what does and doesn't work...

The rewards are worth it... I race with guys like Dick Crowe and Brian Buaas, and they keep very little about their setups to themselves... They'll gladly tell you what motor, what ESC, where the timing is set... help you set your strut and tabs... even what prop they are running... You can bolt all that on and they'll still blow you away... There is a LOT in the prep of the prop, and I contend it's really what makes the MOST difference for a given setup...

[SJFE]

Thanks guys. I have some numbers to start with. I have been putting it off but it's time to buy a balancer some tools and some new cartrages for the resporator. Off to school I go.