Prop advise

[Gabe_k]

Well, ive decided to bring my old beat up miss geico back to life.. Im planning on re fiberglassing the thing and fixing all of the damage. Im ordering a new rudder, upgraded flex cable, new canopy, and a leopard 3674 3270kv (this will be a 4s boat so the kv should be okay right? or should I lower it down a bit) it will have either a seaking 180 or turnigy 180 esc.

Giving the provided info, what type/size/pitch prop should i run? Obviously i want this boat to go fast, but id rather have reliability.

[tlandauer]

3270kv x 14.8v=48,396rpm ( unloaded) =

Try 2200kv with 4s.

[Gabe_k]

Lol I do not understand motors at all! So with a 2200kv, what size prop would work well?

[tlandauer]

Lol I do not understand motors at all! So with a 2200kv, what size prop would work well?

On that boat the x642 or m445 should work.
Take a look at the recommanded motor/rpm chart that is under each motor on the web here. 48,396 is in SAW territory, you need to be in 30,000 range, give a couple thousand more or less for sport running.
Mine has 4082 Leopard and the kv is 2200. With x642 the boat was GPS'ed at 53.3mph, I know other people have run faster, but you need to select the right kv.

[Gabe_k]

I use to run 6s on the stock electronics and never had a problem... i never gps'd it but im sure it was somewhere near 50. however i dont have my 3s batts anymore and im trying to get somewhere near the same speed on 4s.. should i maye get a larger motor then? since you run the 4082, would that be a better match or what do you guys think i should run?

[tlandauer]

Leopard 4074 should do, I will go with the 1400kv personally, I like reliability and that gives you a comfortable 31,080 rpm .
Some may suggest you to the 1650kv, but that is at 36,630 rpm.
Also I prefer "Y" wind motor over "D" wind.

[Fluid]

Since the OP is running 4S the 2200 Kv motor is what he wants...




.

[tlandauer]

Since the OP is running 4S the 2200 Kv motor is what he wants...




.

You are right, I don't understand where I went wrong!
Please ignore post #6, I read your post #5 but had totally misread about what you were saying! lol...

[Gabe_k]

lol 2200kv it is! yes this will be a 4s boat for rec use, and the occasional jump off waterfalls and stuff

[Speedracer128]

Gabe,

Your going to bring her back to life so you can launch her again of the waterfall? After I reinforced my hull she's much more solid. I put the 4082 in mine and she flies. I put the 1800kv. On 4s she runs ok and is fast on 6s. This weekend I'm going to try 5s. I use a 642 and ran her a couple times on x646

[Gabe_k]

Gabe,

Your going to bring her back to life so you can launch her again of the waterfall? After I reinforced my hull she's much more solid. I put the 4082 in mine and she flies. I put the 1800kv. On 4s she runs ok and is fast on 6s. This weekend I'm going to try 5s. I use a 642 and ran her a couple times on x646

haha yup!, just placed my order today so ill update this thread as i progress with it. gonna start fixxing the hull tonigh

[Gabe_k]

Got the old motor mount/wood set up out..

Will be putting a 4082 motor and mount in there.. Also epoxied the heck outta my split seem. Lol

I filled the entire hull with expandable foam so there is no what I can get in there to do glass work so this will have to do.

Mods can you please move this to the miss geico forum

[Heaving Earth]

4082 is gonna suck down 2s packs quick. Are you planning on running 4s packs parallel?

[Gabe_k]

Nope... Just 2 cells. They are 5200mah, not really worried about runtime right now... The 3 boats I've been driving lately never go through a set due to something failing lol I kinda have a feeling this boat will break before it dains the packs haha

[Gabe_k]

I also may buy some 3 cells batts so I can run 5s... Don't think that'll last long either since its a 2200kv