Couple of questions

[Eggy]

Just bought the BJ26 and had it out on the lake today, great boat. Clocked it at 35Mph right out of the box with 2x 2C 5000Mah Lipo packs.
As everybody else i want to make it go a bit faster, not thinking about changing out major stuff like ESC and motor, but small things like props, battery etc.

- I have a couple of Octura X447 would these be any good? buying some Octura X642 when i get the money but would there be any point in trying the X447 while i'm waiting.

- Right Now i'm runing 2x 2S 5000Mah Lipo packs (14.8V). i also have 2x 8.4V 3800Mah Nimh (16.8V), Will i gain some speed in changing to the 16.8V Nimh setup Compared to 14.8V Lipo and will the ESC / Motor handle it. I have the PRB3311 card.

- Anything else i can do to gain some speed, while not loosing to much handling?

Thnx.

[Meniscus]

1st: Welcome to Offshore Electrics! You will find a lot of good information here as well as many knowledgeable people that are more than willing to help with any questions you may have.

I wouldn't recommend trying the X447. With the larger size prop, it will result in a higher amp draw which could, potentially burn up the ESC.

I'll leave some of the other questions who have tried similar setups. To gain a little more speed, you can adjust the angle of the strut. If you post pictures of your current setup including pictures of the angle of the strut (profile), then it will help to guide you in the right direction.

Are you new to boats or FE boats?

[Eggy]

Everything is stock so the angle of the strut is like setup from Proboat. i have been driving a Modded Villain with Octura X447 props. 16.8V and some more stuff, for a long time but its not close to the BJ26. Clocked the Villain to 20Mph and the BJ26 to 35Mph.

[kookie_guy]

the X447...
Diameter: 1.85"
Total Pitch: 1.4x1.85=2.590"

the X642...
Diameter: 1.65"
Total Pitch: 1.6x1.65=2.640"

The diameter of the X447 is bigger, but the pitch is lower. When you look at the actual total pitch, the X642 will be faster, but I don't really know how the diameter difference will affect motor loads.

Stick with the lipos. Although you have more voltage on the NIMH, you also have more weight. Plus, a lipo will easily handle the corrent draw without any voltage loss. Those NIMH packs can't support the current draw for long, and will drop in voltage. So lipos is the answer.

For a bit more speed, you can remove as much excess weight as you can (battery trays, tupperware box), and move the batteries closer to the transom. This will help the boat run more dry, increasing the speed a bit.

that's all I got

[Eggy]

I see that some guys are running 5S / 6S Lipo.

- Will the ESC and the motor handle 6S lipo (22.2V) or will it fry over some time?
- How do you run 5S Lipo, new to the lipo/BJ, do you combine 1x 2S and 1x 3S lipo, or just one pack of 5s Lipo, in that case how is this done?

Thnx

[mtk]

I run 5s one 3s and 1one 2s I run a bec pack I have the stock prop I goes 50 I had turn fins off

[Eggy]

So its so easy as hooking up 1x 2S + 1x3S to the ESC like you would normaly use 2x 2S or do i need to change some settings?

[mtk]

because you run lipos I guess you have a programer so set it to lipo and high cuttoff. I live in Florida so right now I can only run for 5 minutes and I'm sweating and the engine is a bit hot like 120 degrees because the water is like 95. I also reccomend you run a bec battery.I used my gps and it hit 53.6 it was crazy . I changed my turn fins and they are amazing I have the stock prop right now. sorryif a left something out happy boating

[mtk]

o ya I forgot to say I wouldn't recomend 6s cause of a high amp draw and 24.8 v charged

[Eggy]

Could you tell some more around the BEC battery? Dont realy know what it's all about.
Also what is the max voltage for the ESC? Think is was around 21V right?

Dont think the temp is a big prob here, live in Norway and the water at the lake where i drive is like 60-65F tops. Air Temps is around 75-85F Tops.

[mtk]

a bec as a battery eleminateing circute it plugs in the reciver . you have to either remove the red wire in esc.you can run it without a bec battery some people say it works some don't and it blows up.

[mtk]

a bec as a battery eleminateing circute it plugs in the reciver . you have to either remove the red wire in esc.you can run it without a bec battery some people say it works some don't and it blows up. the max voltage is 21 remember a full lipo is 4.2v

[Meniscus]

If you plan on using a receiver battery pack => either 4AA batteries or another pack style providing +- 6V, ALWAYS disconnect the red wire coming from the ESC. I find this is best done with a short servo/ESC connection extender. This type of cable has female on one side and male on the other. You then cut the wire on the extension cable. This way, you don't have to worry about recconnecting the red wire if you decide to utilize the BEC in the future.

Just remember, NEVER run the ESC with the RED wire attached while running a receiver pack plugged into the receiver.

My own personal opinion, I wouldn't run 5s on this ESC. If for no other reason as, with the programming of the ESC, it only allows "high" voltage cutoff for 4s. This means that if you are running 4s1p, then the ESC will shut down at 12.8V = 3.2V per cell. If you run 5s1p with the shutoff the same, then it will shutoff at the same 12.8V, but will = 2.56V per cell. This is too low a voltage for Lipo batteries and will result in damage to the packs or catastrophic failure.

I hope this helps!

First though, definitely play with the angle of the drive system and move the batteries around. You'd be surprised what a difference this makes!

[kookie_guy]

also keep in mind that 5s is not as simple as a 2s and 3s pack. You gotta be sure they are the same mah battery.

[Meniscus]

also keep in mind that 5s is not as simple as a 2s and 3s pack. You gotta be sure they are the same mah battery.

...and "C" rating for discharge.