Wanna make Miss Geigo FAST...need some input

[benjijames]

I have finally ordered a turnigy marine 120 A and a aquacraft ul-1 motor 2030 kv that I plan to use on 4S. I already have an octura X642 prop. Is this prop appropriate? What timing do I have to put on the esc ? Can I use the water cooling jacket of the stock motor on the ul-1 ? (both motors have 36mm diameters). Can I keep the stock 3.5 mm connectors of the motor or do I have to switch to 5.5mm. Do I have to add a battery receiver pack or can I use internal BEC ? Can I try riding 5S with this setup ?
I was riding all stock on 5S with a X642 prop but I was a little disappointed by the speed. Thank you for your help.

[gek1946]

Motor and ESC changeiver

I need your help. I have a Mystic 29 using 7.4 5500mah/35c 2s traxaas batterys hooked in series.
Ive changed to motor to a 4074 with 180a esc. the prop is octura 645. After changing the motors and esc the boat goes much slower. I have the hobby king program card for the esc and have changed it many ways, nothing has helped. With the boat on the workbench and prop shaft removed the motor has the same rpm no matter how i change to specs on the porgram card. I have used lvc no protection,also 3.2,3.4. Im beginning to believe i have a bad esc or motor. Im ready to change the motor and esc back to the stock. When stock the boat was running 38-4o mph on gps,with the 4074 and 180esc 30 mph is tops, no matter how i program it.
thank you
gek1946

[bbosncali]

If you wired the batteries in series then that's your problem your only getting 7.4vlt instead of 14.4 you need to run in parrallel and also make sure your prop is balanced. That's a little big for a 4074. Is it a leopard or an off brand? Also what kind of connectors r u using for battery and motor? I run a castle 1518 in mine with an m645 and hit consistant 60's on 6s.. also is your prop an m645 or an x645? Big difference. If you continue to use that prop watch your temps and add some capacitors. This has just been my experience

[bbosncali]

Ben the prop is fine use an external bec with battery pack for anything over 4s also junk those 3.5 bullets go with 5.5 or 6s also don't use deans plugs the amp rating is to low I like the Ec5 connectors there rated at 120amps hope this helps

[jac4412]

Youre also going to want to make sure the prop and strut height are sharpened and balanced as well as at the proper height (respectively). Raising and lowering the prop by just a couple mm can drastically increase (or decrease performance).

[gek1946]

If you wired the batteries in series then that's your problem your only getting 7.4vlt instead of 14.4 you need to run in parrallel and also make sure your prop is balanced. That's a little big for a 4074. Is it a leopard or an off brand? Also what kind of connectors r u using for battery and motor? I run a castle 1518 in mine with an m645 and hit consistant 60's on 6s.. also is your prop an m645 or an x645? Big difference. If you continue to use that prop watch your temps and add some capacitors. This has just been my experience

I thank yo for your comeback on my problem. Ive changed everything over to 5.5 plugs and gotten rid of the deans.The motor is a Leopard 4074 and the prop is an X645 octura. I still have the stock stainless prop that came with the boat but havent installed it. The boat was runing fine with the stock set up but i just wanted to faster than slower. Also your information on series and parallell is incorrect, im running on 14.4 volts in series, red to black etc. to creat the 14.4 volts. Thanks again and any other information you have would be appreciated. Does this Diesel who is listed in a lot of these forums is a person who might have some ideas?

gary1946

[gek1946]

Diesel i have a problem with using a leopard 4074/a80a esc. Im listed under Motor ESC Changeover
Ive written to anohter member of the forum and am writing to you also if you have any ideas of my trouble
your help is appreciated. if you dont find me in the forum I can be reached at [email protected] for some help

thank you
gek1946

[bbosncali]

I would de-tongue your prop cause that's a lot of prop for a 4s setup. I use an m645 which is already been de-tongued its less prop but it will spin faster. Also what is the kv of your motor? That could also have a lot to do with it. Just my opinion

I thank yo for your comeback on my problem. Ive changed everything over to 5.5 plugs and gotten rid of the deans.The motor is a Leopard 4074 and the prop is an X645 octura. I still have the stock stainless prop that came with the boat but havent installed it. The boat was runing fine with the stock set up but i just wanted to faster than slower. Also your information on series and parallell is incorrect, im running on 14.4 volts in series, red to black etc. to creat the 14.4 volts. Thanks again and any other information you have would be appreciated. Does this Diesel who is listed in a lot of these forums is a person who might have some ideas?

gary1946

[gek1946]

The motor is a 4074/2000kv Leopard. The prop has been reworked.,

[Diesel6401]

I need your help. I have a Mystic 29 using 7.4 5500mah/35c 2s traxaas batterys hooked in series.
Ive changed to motor to a 4074 with 180a esc. the prop is octura 645. After changing the motors and esc the boat goes much slower. I have the hobby king program card for the esc and have changed it many ways, nothing has helped. With the boat on the workbench and prop shaft removed the motor has the same rpm no matter how i change to specs on the porgram card. I have used lvc no protection,also 3.2,3.4. Im beginning to believe i have a bad esc or motor. Im ready to change the motor and esc back to the stock. When stock the boat was running 38-4o mph on gps,with the 4074 and 180esc 30 mph is tops, no matter how i program it.
thank you
gek1946

I thank yo for your comeback on my problem. Ive changed everything over to 5.5 plugs and gotten rid of the deans.The motor is a Leopard 4074 and the prop is an X645 octura. I still have the stock stainless prop that came with the boat but havent installed it. The boat was runing fine with the stock set up but i just wanted to faster than slower. Also your information on series and parallell is incorrect, im running on 14.4 volts in series, red to black etc. to creat the 14.4 volts. Thanks again and any other information you have would be appreciated. Does this Diesel who is listed in a lot of these forums is a person who might have some ideas?

gary1946

Sounds like your esc may not be recognizing full throttle. Did you calibrate the throttle? That m645 is a lot of prop, a 2p setup would be much better then a 1p setup with that prop. I would suggest dropping to a m445. What timing do you have your esc set at? Do you have a gap between the drive dog and strut?


What's the specs on your lipos? If you mentioned that info b4 sorry asking again.

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[gek1946]

You were exactly right I calibrated the throttle so it would recognize full throttle I hit the throttle the first time and the boat leaped out of the water and ran extremely fast and straight. Im using just a simple lipo 5500mah/35c 2s Traxxas Rustler batterys. I didint change an prop yet. Your advice paid off. The question still is should I get different batterys,and maybe go to a different prop,or should i put back on the stainless that came with the boat? Thanks for helping me out,you know your stuff!

gek1946

[Diesel6401]

You were exactly right I calibrated the throttle so it would recognize full throttle I hit the throttle the first time and the boat leaped out of the water and ran extremely fast and straight. Im using just a simple lipo 5500mah/35c 2s Traxxas Rustler batterys. I didint change an prop yet. Your advice paid off. The question still is should I get different batterys,and maybe go to a different prop,or should i put back on the stainless that came with the boat? Thanks for helping me out,you know your stuff!

gek1946

Lucky guess on the throttle calibration

How has the prop been "reworked" ? More then just a s&b? A x645 is a lot of prop, a m445 and a 4s2p is a nice setup or a grim 42x55 or x442 on the batts u have or on 2p would be nice also.

The stock prop is similar to a prather 215. If u s&b it it's not a bad prop.

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[Boat guy]

When you say a grim racer 42x55 prop do you mean 2 blade or 3 blade. Any way to run 8s if so what esc can you get. Most I look at only go to 200 and w 8s it will need more. Thx