Help with Miss GEICO that is stock want to make it go 40mph.....

[16.luca]

looking to get 40mph with my stock MG.

i have 4s (2x2)(7.4v each one) 30-40c ratings

stock 1500kv motor

stock 45 amp esc

stock prop but will upgrade if need be. was looking at the Octura X645 but will this be ok for my electronics? (make some recommendations plz.)

My goal is 40mph and still having my motor,esc,batteries at a good temperature.

any suggestions are helpful.

plz be as detailed as possible i love details.


thank you guys


ciao luca.

[Rumdog]

Try a m445 or a x642

[16.luca]

would x645 be to much for my stock electronics

[16.luca]

could you tell me the speeds for the m445 prop?

[ron1950]

my geigo with a t120 and a 1800kv motor and m445 is about 45 maybe more depends on the wind conditions.....btw ose got m445 s and b in today

[16.luca]

I'm trying to utilize the stock electronics because i don't have extra money to spend on esc, and motor......

would the x645 prop be to much for my mg electronics?

[ron1950]

id not try a 645 ...it will prob cause alot of heat.....id go 442 or 642 myself

[16.luca]

do happen to know the stock specs for the stock prop that comes with the boat

[16.luca]

are your talking about the x442?

[lyndon915]

My boat, all stock with an M445 on the standard 4s was consistantly hitting 40-40.5 on my GPS. I did however melt a few bullet connectors off the motor and had to change them.
Good luck with it.

[16.luca]

when you say your boat you obviously mean your miss gieco?

btw how are you battery placements inside I'm trying to figure out how to get rid of the bounce?

thank you

[lyndon915]

Yes, it is a miss gieco. I have foam in both sponsons and my batteries hang over the front of the battery trays about an inch they are turnigy 5000Mah. I also mount my garmin GPS in front of the motor. My strut is flush with the bottom of the ride pad at a slight up angle. As far as the bounce goes, I thought I had it kicked for a while but lately it has come back. I think it may be that the bushing in my strut is starting to wear out and allowing excessive play in the prop and prop shaft. I have since burned up my motor due to clogged water inlet and replaced it with a Feigao 11XL and Etti 150 amp esc I had lying around. Speed now is around 43 but everything is running much cooler.

[16.luca]

cool.

i have only run my mg for 2hrs total i just got it.

i thought the cog was about 9in from the transom? why add more weight to the front? don't you want it to balance?

i have turnigy 5000mAh but are they 30c-40c like they say on the sticker?

btw what does changing dimeter do for a prop.

what do you think of the prather s220? good choice?

[lyndon915]

So I have a theory about the CG on this boat. Now I could be totally wrong with this but I have been running my boat in this manner and all seems to work well.
I have always read that the CG should be roughly 1/3 the length of the boat starting from the back of the boat. Now with this boat the overhanging part of the transom is a few inches long but once the boat is up on plain has relatively little contact with he water. Due to this fact I don't think that the CG should be measured 9 in forward of the transom but rather 9 inches forward of the back of the ride pads.
If you measure the length of the wetted surfaces of the boat it is approximately 27 in., 1/3 of this distance is exactly 9 inches. If you measure the total length of the boat is roughly 30 inches and 1/3 of this is exactly 10 inches.
Therefore, I believe that the manufacturer decided the best CG by measuring the length of the wetted part of the hull. This also seems to be backed up by people's practical experiences. I think that there was just a mistake in communication between the people who tested the boat and the people who made the instruction manual. Once again this is only my theory on the matter but my boat seems to be running very well like this with very little bounce and pretty good top speeds when it was stock, ie. 40+ mph.

As far as the batteries go I believe that the first number is the constant C rating and the second is burst. I'm running the 40C constant batteries. By going to a larger prop you should increase your bite on the water but you also increase your current load on your motor and ESC which can cause high temps and possibly burning something up. I have no experience with the prather s220 prop but I'm sure if you look around you will be able to find someone who has used it.

Hope this helps.

[16.luca]

@ lyndon915 thank you for the info, i think i will call probate up and ask them how they want the cog set up not his boat form either the transom or the ride pads, i will let you know what i findout.

btw how did you have your strut placed?