Kyosho Jet Stream 800 Newb going brushless??

[MR2NR]

New Guy with very little local Hobbystore help. I'm from around Springfield MO and there are hardly any hobby stores around and even less dealing with Marine parts. So I turn to the web....

So I've dusted off my old JS and threw a Traxxas Blast brushed Trinity motor in it (P2Kpro) with an old Duratrak Streak ESC I swapped props with a Proboat 1.9 x 3.0" (PRB0152) It does a bit better and all but I want more. So I am planning on going brushless. I have a Hobbywing 2848 Seaking motor and a Hobbywing Seaking 90A ESC on it's way. I'm going to stick with 7.2 NIMH at first as I know this will not be the most stable Deep V then maybe series running it at 14.4 and going Lipo is a little out of budget right now. Do you guys think I'm wasting my time on this old bird or have you seen actual high speed numbers from this hull. I read the older tutorial on the Jet Stream but he just had a dual 5S setup I have my drive line all shimmed and aligned and am limiting the turn radius with the Tx. I do need turn fins installed but it is very hard to find a hobby store in my area that carries one or more setups for boats so we are just getting cooling hose and pickups and outlets in order. She weighs 5 ibs. w/ batt so ya it is def a tanker :) just let me know your opinions and if anybody is running one still I'd love to hear from you!

[Make-a-Wake]

If you want to go brushless i wouldnt use the small motor you have mentioned. These boats can be converted but need a lower rpm setup due to the u-joint outdrive. I'd suggest a a Leopard 3674 1400kv on 4s lipo or 12-14 cell nimh and use a prop in the 45-47mm range. The boat will only be stable up to about 35mph or so. An ESC rated at a least 90 amps would work. You need to watercool the electronics as well.

http://www.offshoreelectrics.com/pro...ker-seaking-90

http://www.offshoreelectrics.com/pro...o-3674&cat=148

[Punisher 67]

I have a Jetstream 800 I have had for 20 years and its still in mint condition . At one time is was powered by a Astro flight cobalt 40 running on 28 scr1200 cells . she was a 30mph water boiler way back in the day . 5 LBS is far from a heavy boat so you are doing good . I have since gutted it and completely cleaned it up inside and out and repowered it by a 3670 quannum brushless motor . it sits on my boat shops wall unit here is a picture of it post yours also . Make-A-wakes suggestion is dead on I also powered mine with a 45mm prop . I usually side on the air of caution and might up the amperage on the esc just a wee bit I had a 120amp on mine .

[Make-a-Wake]

That boat is absolutely gorgeous!!! I'd keep it on the wall too........................well..................i 'd sneak it out once a year or so.

[MR2NR]

I know I'm going to have to go water cooled but I don't think I can swing the twice as high $$ leopard. I have a 48mm prop. So will I have pretty slow acceleration or will it just wash out and heat up the motor? I have a reduction gear setup unlike Punishers direct drive. (The motor sits with the drive shaft forward) What about the Hobbywing 3660 I got it but it has a 5mm shaft so I planned on exchanging it should I go direct drive with it and how?


Ya Punisher put up your clean has hell JS and then ask me to post pics lol..... Oh wellIMG_0115.jpgIMG_0110.jpg Don't ask me for interior pics!! (If your really interested though I have Youtube vids (MR2NR15):)

I got her pretty beat up and just stripped her and painted her. Yes it is a police boat but the LEDs come on with the Tx and a siren also :). I am repainting next week and will put more pics up but don't think its going to be a whole lot different :).

Punisher What ESC box do you have? What are you using for your mount attachments? Silicone? Acrylic? Looks super clean :) Love the exit pipes!!!

Thanks so much for posting guys!!!

[Make-a-Wake]

If you're going gear reduction you can use a 2500-3000kv motor..............a 3660 should get it going ok.

Here's one for half the price of the Leopard..............4 poles too.

http://www.hobbyking.com/hobbyking/s..._Inrunner.html

[Punisher 67]

I just used silicone for mount attachments to the hull here are some better pictures of the motor mount system , the esc box was a 100 amp 12 cell turnigy unit with an aluminum water block that I made to cool it , hey there is nothing wrong with you paint scheme if they all looked the same they would be boring . The mount and U-joint was bought from OSE list of parts

[MR2NR]

If you're going gear reduction you can use a 2500-3000kv motor..............a 3660 should get it going ok.

Here's one for half the price of the Leopard..............4 poles too.

http://www.hobbyking.com/hobbyking/s..._Inrunner.html

Lol then Ill have to drill out the gear for the huge 5mm shaft. Is there any easy way to get it down to 3?

[Punisher 67]

You know it really wouldn't be to hard to go direct , Steven at ose has the mount for less that $10.00 and the U-joint that connects the boats 4mm shaft to the motors 5mm shaft . I could even mail you the alignment tool that you see in the second picture directly above in post #7

[MR2NR]

Well for now I guess I'm stuck with the higher RPM as the parts from OSE would be another 20$ w/s/h. I'll keep the 3060 and If I hate it or it I guess I will go the direct route. What about going Dual 2848's (3900kv) Would I need two ESC's? Or am I really shooting for the stars lol.




How much did you want for the alignment tool?

I get free shipping with Hobbypartz and I needed a Lipo/NiMh charger anyways.

Thanks for all your help guys and I should get a nice stockpile of motors now hehe.

[Punisher 67]

I'll mail it to you for nothing just mail it back when your done - fair enough

[MR2NR]

Oh ya definilty! But I won't need it for a while until I can save up for the Leopard :). I get paid every month so prob around Oct 20th.

Man I wish I would have found this forum earlier.

[Chenige]

How big is this boat?

[Make-a-Wake]

I think its around 32"...................

[MR2NR]

Ya 31" Hull / 34" w/ Prop shaft. So about 32" :)