dynamite 2000kv upgrade

[Krazykenny]

can anybody advise me on a possible upgrade for my custom project using a blackjack 24? i can get Turnigy Aquastars readily enough,and a selection of Leopard Motors, albeit limited in UK. not looking for insanely fast just a noticeable increase in "punch" and velocity,but still keeping controlability. i aim to use the 120a turnigy marine i have with it,rest of boat is standard at present except removed all decals,pending custom paint job and decals planned for future. im keeping the boat bright red but planning to have Ferrari Decals and rename it "Marinello Mystique" as a tribute to my favourite F1 team. this will NOT be commercially replicated by myself, its strictly a one-off. any other suggestions for minor upgrades would also be appreciated.

[rol243]

I don,t know the hull but would the motor be a 36 mm diameter can or smaller ? if its a 36 you could go for the Turnigy xk 3674 x 2200 kv motor which is cheap and has good power.

[fweasel]

Get a bushing on the rear strut if you still have the stock aluminum stuffing tube. Several different options to get that done, but without it, things wear out fast.

[Krazykenny]

my apologies fweasel,im unfamiliar with the technical terms you use, bushing on rear strut? , i know that the boat is as far as im aware standard, it has a flexible drive shaft,with an outer plastic? sleeve, that much i found out myself through greasing maintainence, im afraid im a relative newcomer and trying to soak up as much info as possible on this hobby to which i have become hooked, i dont want to create a 80 mph missisle ,as im aware of the basic hull limitations,and other components, and my regular run area is not big enough for those velocities anyway, i do however appreciate your help and advice,thank you.

[Krazykenny]

I don,t know the hull but would the motor be a 36 mm diameter can or smaller ? if its a 36 you could go for the Turnigy xk 3674 x 2200 kv motor which is cheap and has good power.

THANKS ,i think that was one of the motors i was considering, HK in UK has it at decent price,so might go for that.,other consideration was Leopard but not sure what model,and it needs to be watercooled.

[Mxkid261]

Have a read through this BJ24 thread.

https://forums.offshoreelectrics.com...est-bj-24-ever

[fweasel]

my apologies fweasel,im unfamiliar with the technical terms you use, bushing on rear strut? , i know that the boat is as far as im aware standard, it has a flexible drive shaft,with an outer plastic? sleeve, that much i found out myself through greasing maintainence, im afraid im a relative newcomer and trying to soak up as much info as possible on this hobby to which i have become hooked, i dont want to create a 80 mph missisle ,as im aware of the basic hull limitations,and other components, and my regular run area is not big enough for those velocities anyway, i do however appreciate your help and advice,thank you.

No apologies necessary, this is the place to learn new stuff. There may have been a design revision in that boat since I owned one, but the flaw in the original design was the black aluminum tube (stuffing tube) that houses the flexible cable (flex cable) from the motor out through the rear of the boat. That aluminum tube ran all the way through the rear strut (silver metal piece bolted to the rear of the boat that supports the tube just before the prop. The solid section of the flex cable called the prop shaft, spins inside the aluminum stuffing tube instead of a separate set of bushings like you've find on most other boats. When everything is new, it works, however, the stainless material of the prop shaft is harder than the soft aluminum stuffing tube and the aluminum begins to wear out, causing excessive clearances and imbalance when the prop is spinning.

Kintec Racing used to sell an upgraded strut that would allow you to install a traditional brass bushing, but they've closed. I believe it was possible to install the replacement strut from the Proboat Recoil 26 with only minor modifications. You can see the lead teflon style bushing pressed into the strut in this picture. Compare it to your boat, and you may see only the aluminum stuffing tube in your strut.