New Power System For BJ 26....

[LiPo Power]

This is my second boat. It is in very good shape. Purchased from one of my friends and I like it. Now it will kick ... even more with this new power plant installed. Hydra-120, Feigao 8XL, x642 prop, 2 x Thunder Power 5000mAh, with 40C afterburner. Any ideas of what speed I can get on this now? Please let me know....

[LiPo Power]

After my first run using this set-up my ESC is running 120-150F, motor is fine between 80-105F. Is the temperature of ESC ok? I think is too hot and do not know what the reason is. My prop is X642. Will I make it better by installing separate cooling for ESC only? No noticeable speed increase either when comparing to stock motor and ESC. Does anybody have suggestions what to change to get her little faster with my set up?

[eboat]

Are you still using the stock hardware on the back of the boat ?

[LiPo Power]

No. When I got this boat original hardware was replaced with this one, see picture.
Thanks
Robert

[Brushless55]

hmm, I thought you would get much higher speed with this setup?

[domwilson]

Do you have a few more pics of the backend?

[mtk]

run a second cooling line from your hardware into the esc and one for the motor that might help heat

[domwilson]

Just trying to figure out if your strut is a tad too low. That would account for the less than optimal speed and the high temps. Try raising it in 1/8" increments. Keep the strut angle at zero degrees. You don't want to load the motor too much. You can do alot with strut adjustments.

[LiPo Power]

Thanks domwilson.
Raising strut 1/8 should make her run light on the front or more dry, is that what you mean?
Do you think I should be ok with X642 prop or should I go back to stock?
I do have second cooling system installed for ESC only with larger silicone tubing for better water flow, that should help temps. I will also reset timing to low for now just to check if this will help with ESC temp.
I will post more pictures of my BJ when my hardware is back from overhauling at Mr. Fuller. It had too much play on strut bushing. It shoud be back very soon. I will try to put it on the water on Saturday with GPS to check speed and temps again.

[domwilson]

The strut angle will affect the ride stance whether the bow is up or planted. The height will affect the prop depth and the motor loading as well as speed. Both should be done for optimal balance of your cat's performance. The X642 is fine for this motor.

[domwilson]

Here is a pic of one of my cat's (not a blackjack) strut height. I use this as a starting point with good results. Did the same on my blackjack. but the final adjustments you will need to make yourself as differents boats, even same model and configuration, may have a different adjustment.

[LiPo Power]

Thank You.

[LiPo Power]

Umm, when you have few minutes of your time, could you post one or two pictures of your BJ please?

[785boats]

Lipo Power.
The first thing I noticed in the picture that you posted is there is no gap between the drive dog & the strut.
This would certainly be loading up the system as the flex shortens under load & robbing you of some speed. It can also increase temps due to the extra current draw.
It may not be the whole answer but it's not good. Take a close look at the pic that domwilson posted. 1/8" to 3/16" is a good gap.
As an indicator I have the bottom of the strut set 1/16" above the the bottom of the hulls & level. It's not a Black Jack however, but a 32" Apparition.
All the best.
Paul.

[domwilson]

Lipo Power.
The first thing I noticed in the picture that you posted is there is no gap between the drive dog & the strut.
This would certainly be loading up the system as the flex shortens under load & robbing you of some speed. It can also increase temps due to the extra current draw.
It may not be the whole answer but it's not good. Take a close look at the pic that domwilson posted. 1/8" to 3/16" is a good gap.
As an indicator I have the bottom of the strut set 1/16" above the the bottom of the hulls & level. It's not a Black Jack however, but a 32" Apparition.
All the best.
Paul.

Good Eye! Push that strut forward a little.