Best bang for the buck 7.2-7.4 volts single battery?

[CaptPJB]

Keeping at 7.2-7.4 volts ie single battery Lipo or Nimh what is the best bang for the buck? Brushless motor which means changing esc or a slighter hotter brushed motor keeping the existing esc if so which one? Speed 600?

I have no issue using a 7.4 lipo and timing runs to avoid damage to the battery. Presently I run at full throttle all the time with standard set up. When Nimh is fresh performance is ok but after a minute or so it drops off using 2000 Nimh

Peter

[Diesel6401]

Keeping at 7.2-7.4 volts ie single battery Lipo or Nimh what is the best bang for the buck? Brushless motor which means changing esc or a slighter hotter brushed motor keeping the existing esc if so which one? Speed 600?

I have no issue using a 7.4 lipo and timing runs to avoid damage to the battery. Presently I run at full throttle all the time with standard set up. When Nimh is fresh performance is ok but after a minute or so it drops off using 2000 Nimh

Peter

Welcome to the forum. First thing I would suggest reguardless which direction you (brushed/brushless) is change the stock esc out asap. It's just not up to the task. With a speed 600, new esc, diferrent prop and a 2s lipo you may mange high teens, low 20s. I say just go brushless, their are a number of members running brushless set-up here I will help you pick the right combonation. Member Jesse J has the fastest RIO I've seen on video. I sure he'd help you.

O to your question use a lipo!

[CaptPJB]

Welcome to the forum. First thing I would suggest reguardless which direction you (brushed/brushless) is change the stock esc out asap. It's just not up to the task. With a speed 600, new esc, diferrent prop and a 2s lipo you may mange high teens, low 20s. I say just go brushless, their are a number of members running brushless set-up here I will help you pick the right combonation. Member Jesse J has the fastest RIO I've seen on video. I sure he'd help you.

O to your question use a lipo!

Understood about the stock esc. This is "throw down" boat so on a budget is there a HK brushless package that would work?
Not looking for the ultimate just 18-22 mph at minimum cost. Figure stock 15-18 fresh battery. Anything around 18 sustained would be good

Peter

[Jesse J]

shoot for around 3000KV motor a 38-40mm prop and a 120-150 amp ESC your boat will fly! on 2s or 3s you should get mid 20s and mid 30s, respectively.

[Diesel6401]

shoot for around 3000KV motor a 38-40mm prop and a 120-150 amp ESC your boat will fly! on 2s or 3s you should get mid 20s and mid 30s, respectively.

The man has spoken!!!

Thanks for backing me up Jesse :thumbup1:

[CaptPJB]

The man has spoken!!!

Thanks for backing me up Jesse :thumbup1:

Don't dispute the words of wisdom but that combo with esc is $100 plus the original boat cost. For $200 I can get a modded sv27. I know I just sold one! This is meant as a anyone can use it throw down boat to lead them to the sport

Looking for approx sub $50 tweaks to make the stock boat an 18 mph one if that is possible?
Peter

Best thoughts right now a big 7.4 lipo to keep voltage up over a 5 minute run

[Diesel6401]

This may help


vspec..

your post is honest and well done..

The Rio EP was not designed to be a speed demon.. If that was the case it would have been brushless.

The market for this boat is the new guy that just wants to get the feel for an RC boat and the 2.4 is hobby shop friendly.. do ya know what I mean?

Anywho.. YEP.. its time to MAKE IT ROCK.. mine has went 22 on a brush (Speed 600) motor and 7 cells..

Lets have some fun………

Grimracer CHALLENGE to the go fast guys……..Go ahead.. knock it off the top!

ROCK ON!

Grim

Disclaimer: Modifying you boat will void the warranty.. but I bet you knew that!

[CaptPJB]

Went to run the boat again last night and no motor although rudder works OK. Ran power direct to motor it spun up so it looks like the ESC is the culprit.

Boat is two months old but sending it back for repair would cost more than buying a new ESC from Aquacraft but I don't think that is the way to go in the long run. Anyone know if I I have to send the whole boat back or maybe just the ESC?

Anyway I guess it means upgrade time is coming sooner than anticipated I will continue to search forum for economical ESC and motor combo that gives a little more performance.

How does one remove the radio box to access the ESC by the way, does the whole thing come out or do you remove the servo and radio then the wood floor?

Peter

[CaptPJB]

Good news Aquacraft is going to send new ESC still would appreciate some hints how to get to it.

[Diesel6401]

Good news Aquacraft is going to send new ESC still would appreciate some hints how to get to it.

i left mine in the boat, too much of a pain in the a$$ to get out.

[chummer]

It's not hard to remove at all. First remove the servo and then the wood base will unscrew. Cut any connectors from the esc and pull it out. Don't leave the old one in the there. Take the time and remove it and do the job right. I removed the stock esc on 4 of these boats and I did not find it to challenging at all. I replaced it with the pro boat esc. well worth the extra expense.

Hope this helps...:thumbup1:

[CaptPJB]

It's not hard to remove at all. First remove the servo and then the wood base will unscrew. Cut any connectors from the esc and pull it out. Don't leave the old one in the there. Take the time and remove it and do the job right. I removed the stock esc on 4 of these boats and I did not find it to challenging at all. I replaced it with the pro boat esc. well worth the extra expense.

Hope this helps...:thumbup1:

Many thanks that is a help.Since Aquacraft are sending me the new ESC will not go the Proboat route right now.

[Diesel6401]

It's my rescue boat so im lazy with it.. Charge, lube and rescue!!! :tongue_smilie:

[CaptPJB]

Thinking of going with an S600 motor for perhaps a little more speed, can some one tell me if I can run the standard prop or do I need to drop down to a 38-40mm?


Peter

[tunnelvision]

Thinking of going with an S600 motor for perhaps a little more speed, can some one tell me if I can run the standard prop or do I need to drop down to a 38-40mm?


Peter

Fun motor definitely faster than stock. I just put in the S600 with 7 cells and a xl-5 esc. It goes pretty good with the stock prop. Run about 7 minutes tops or it gets to hot. 10 min warm on 6 cells and a 7.4 lipo for 5 minutes and that was fun too. Removed one of the rudders and did not affect the handling much if at all. Also, upgraded to a .130 octura flex, teflon liner and brass stuffing tube. Will post a pic if I can find my camera.

This is a fun boat but I am getting the itch to go brushless. Have an extra pro boat 2900kv, 60amp seaking and a stainless 34mm prop just sitting there...

[CaptPJB]

Was thinking of this motor with standard prop mainly 2s use occasional 3s.
Any and all comments appreciated. Was looking for a "zippy" Rio but not wanting to get in to the torque roll thing
http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=6525

My thinking was standard prop is relatively big so need low kv and an 80-90 amp esc HK esc would be OK.

Peter

[Diesel6401]

Was thinking of this motor with standard prop mainly 2s use occasional 3s.
Any and all comments appreciated. Was looking for a "zippy" Rio but not wanting to get in to the torque roll thing
http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=6525

My thinking was standard prop is relatively big so need low kv and an 80-90 amp esc HK esc would be OK.

Peter

The KV you have selected is way to low, rpm is only 8k on 2s, and 13k on 3s. Way to low, you need to aim for around 22k - 30k for sport boating or just messing around. You need a 3000kv motor in that range like Jesse stated above.

[CaptPJB]

The KV you have selected is way to low, rpm is only 8k on 2s, and 13k on 3s. Way to low, you need to aim for around 22k - 30k for sport boating or just messing around. You need a 3000kv motor in that range like Jesse stated above.

Thanks for getting me back on track obviously my kv math was off, was thinking a lower Kv = bigger prop but missed the point, 3000 x 8 = 24000 on 2s

Peter

[Diesel6401]

Thanks for getting me back on track obviously my kv math was off, was thinking a lower Kv = bigger prop but missed the point, 3000 x 8 = 24000 on 2s

Peter


What's the 8, where did that come from?

Rpm is Kv x Voltage. So a 2s lipo is 7.4 volts a 3s is 11.1 volts (3000 x 7.4 = 22,200), (3000kv x 11.1 = 33,300)

Lower KV you can run a loger prop, but you need more voltage for the motor.

[CaptPJB]

Was just rounding up numbers too lazy to do he math at 7.4 besides which a 7 cell nimh is 8.2 so just took 8 as an average as I run both types of batteries.

Thanks I am clear on kv and rpm.

[Diesel6401]

Was just rounding up numbers too lazy to do he math at 7.4 besides which a 7 cell nimh is 8.2 so just took 8 as an average as I run both types of batteries.

Thanks I am clear on kv and rpm.

Copy, I understand now.

[CaptPJB]

Can someone tell me if the stock ESC will run a S600 on 6 cells 7.2v without expiring?
Looks like Tunnelvision changed his ESC to xl-5 not sure if it was because he had it or needed it.

[Diesel6401]

Can someone tell me if the stock ESC will run a S600 on 6 cells 7.2v without expiring?
Looks like Tunnelvision changed his ESC to xl-5 not sure if it was because he had it or needed it.

The stock esc will not handle a s600, it barely handles the stock motor. I run a xl-5 myself reason being it is waterproof and can handle the load. I would imagine it can handle the s600 with no problem. Run the stock esc with that motor and it shouldn't take long before :flashfire:

[CaptPJB]

The stock esc will not handle a s600, it barely handles the stock motor. I run a xl-5 myself reason being it is waterproof and can handle the load. I would imagine it can handle the s600 with no problem. Run the stock esc with that motor and it shouldn't take long before :flashfire:

Upgraded to S600 motor and ProBoat ESC. Presently running stock prop.

Runs well on 7.4 lipo after 5 minutes temp is 117 F in warm Texas water (around 86 F)

On a 6 cell NiMH 105 F after five minutes.

The lipo option gives me what I was looking for in consistent adequate speed as the NiMH drops off as the run progresses but is 117 F too hot?

If it is options appear to be 40mm prop ( not sure what this would do to speed?) and or new cooling jacket, Presently using the stock coils that don't look too efficient compared to a silicon jacket?

What prop are you using with the xl-5 Diesel?

Any comments appreciated

Peter

[Diesel6401]

What prop are you using with the xl-5 Diesel?



Stock Prop.

I didn't/don't spend a lot of time on that boat. I couldn't tell you the last time is has been in the water. Right now it's stripped. I use a PB Apache as my rescue boat now.

[tunnelvision]

Xl-5 with S-600 is a reliable setup. Here's a quick vid of mine with the stock prop on 2s lipo. http://www.youtube.com/watch?v=JRlE4e7vUKU&feature=channel

[CaptPJB]

Looks good about the speed I was looking for. What batteries are you using?

Mine was running very hot with stock prop and 7.4 lipo although speed was good. Waiting on a 40 mm prop to see if that helps. With the vent holes in the S600 and the Rio mount I have not found any better cooling method than the coils. For sure a silicon cooling ring does not work.

S600 and ProBoat ESC (which runs cool)

[tunnelvision]

WHen I use a 7.4 lipo, the motor is hot after 10 minute runs. hehe. But if i run for 5 to 7 minutes its just warm. I also use a 7 cell 3000mah and its quick with that too and everything stays warm after 5 to 7 minutes. I used to use the proboat esc but it got too hot. Motor runs MUCH cooler with the xl-5. I used this setup most of the summer and have had no problems(knock wood).

Have been wanting to change to a 40mm prop so I can run longer and keep things cooler. Let me know how it works out for you.

[CaptPJB]

WHen I use a 7.4 lipo, the motor is hot after 10 minute runs. hehe. But if i run for 5 to 7 minutes its just warm. I also use a 7 cell 3000mah and its quick with that too and everything stays warm after 5 to 7 minutes. I used to use the proboat esc but it got too hot. Motor runs MUCH cooler with the xl-5. I used this setup most of the summer and have had no problems(knock wood).

Have been wanting to change to a 40mm prop so I can run longer and keep things cooler. Let me know how it works out for you.

Put the 40mm on today and it did drop the temps some. I am certainly envious of your temps. . With a 2200 mah Lipo I was hitting 150 f after five minutes on stock 42mm but with a 40mm it is around 130F. However it did appear to reduce the speed a little but still acceptable.

Maybe the 84 F water I am running in is not helping, I would like the temps around 120 F for peace of mind although I have not been able to find what numbers others call acceptable or hot. ESC and battery run around 105F. Certainly seems the xl-5 runs things cooler than the Proboat if your water temp is anywhere near to 80F

Peter

Just done another 5 minute run after adjusting motor angle to shaft at coupling . Battery 2000 NiMH 110F , ESC 105 and motor 119F at hot end by coupling . Speed stayed pretty consistent only dropping a little during the last minute of a 5 minute run. Certainly getting better consistent speed performance run times with 40 mm, at a guess 40mm and S600 is slightly faster than stock 42 mm and stock motor but lasts longer on same battery. Will comment further when by buddy gets his stock Rio out. ( have to say his always slightly outran mine both stock and using same battery 2000 NiMH.)

[tunnelvision]

Put the 40mm on today and it did drop the temps some. I am certainly envious of your temps. . With a 2200 mah Lipo I was hitting 150 f after five minutes on stock 42mm but with a 40mm it is around 130F. However it did appear to reduce the speed a little but still acceptable.

Maybe the 84 F water I am running in is not helping, I would like the temps around 120 F for peace of mind although I have not been able to find what numbers others call acceptable or hot. ESC and battery run around 105F. Certainly seems the xl-5 runs things cooler than the Proboat if your water temp is anywhere near to 80F

Peter

Just done another 5 minute run after adjusting motor angle to shaft at coupling . Battery 2000 NiMH 110F , ESC 105 and motor 119F at hot end by coupling . Speed stayed pretty consistent only dropping a little during the last minute of a 5 minute run. Certainly getting better consistent speed performance run times with 40 mm, at a guess 40mm and S600 is slightly faster than stock 42 mm and stock motor but lasts longer on same battery. Will comment further when by buddy gets his stock Rio out. ( have to say his always slightly outran mine both stock and using same battery 2000 NiMH.)

40mm sounds to be a bit better but I like more mph's. Where did you get yours? I think I'll give it a go. I usually run it with my 7 cell nimh, save my lipo's (5000mah 25C) for my Supervee. Definitely, want to run it a little longer.

Curious how it stands up to a stocker with the same battery. I really need a GPS to get a better grasp on mods.

Rob

[CaptPJB]

40mm sounds to be a bit better but I like more mph's. Where did you get yours? I think I'll give it a go. I usually run it with my 7 cell nimh, save my lipo's (5000mah 25C) for my Supervee. Definitely, want to run it a little longer.

Curious how it stands up to a stocker with the same battery. I really need a GPS to get a better grasp on mods.

Rob

You can get the props here at OSE or Kintec but you will need to order K & S tubing to sleeve the shaft. Very easy to do see prop hints here on OSE Tips and info. Agree I would like a GPS to accurately tell speed I need to search out a small lite weight one maybe another reader can give us a suggestion?

It will be the weekend I think at earliest before I can run the 40mm Rio S600 against the stock one'

Peter

http://www.offshoreelectrics.com/products.php?cat=Glass+Filled+Propellers

[CaptPJB]

40mm sounds to be a bit better but I like more mph's. Where did you get yours? I think I'll give it a go. I usually run it with my 7 cell nimh, save my lipo's (5000mah 25C) for my Supervee. Definitely, want to run it a little longer.

Curious how it stands up to a stocker with the same battery. I really need a GPS to get a better grasp on mods.

Rob

Rob
Ran the S600 Rio with 40mm vs friends stock Rio and speeds were for all practical purposes identical. Both on 6 cell NiMH, only ran the S600 for five minutes temp at coupling area 134 F while stocker was only 120 F. Can't figure out why the difference in temps the S600 boat puts out a 2-3 inch cooling stream so the water is getting to it OK.

With a brushed set up I don't see running a 40mm has any appreciable benefit over the stock 42 mm which gives good performance and adequate run time except in my boats case it gets too hot!

Peter

[tunnelvision]

Rob
Ran the S600 Rio with 40mm vs friends stock Rio and speeds were for all practical purposes identical. Both on 6 cell NiMH, only ran the S600 for five minutes temp at coupling area 134 F while stocker was only 120 F. Can't figure out why the difference in temps the S600 boat puts out a 2-3 inch cooling stream so the water is getting to it OK.

With a brushed set up I don't see running a 40mm has any appreciable benefit over the stock 42 mm which gives good performance and adequate run time except in my boats case it gets too hot!

Peter

Cool, thanks for the info. I use mostly with 7 cell nimh and noticeably faster than 6 cell. I would speculate that with the s600 and a 7 cell or 2s lipo it is pushing 16 to 19 mph. As for the heat I think the ESC comes in to play. XL-5 runs a little cooler. I am waiting on a temp gauge to get a real feel for temps. Will let you know how it goes. I have been running it for a few months and no problems, when it goes I have a brushless setup waiting!

[CaptPJB]

Cool, thanks for the info. I use mostly with 7 cell nimh and noticeably faster than 6 cell. I would speculate that with the s600 and a 7 cell or 2s lipo it is pushing 16 to 19 mph. As for the heat I think the ESC comes in to play. XL-5 runs a little cooler. I am waiting on a temp gauge to get a real feel for temps. Will let you know how it goes. I have been running it for a few months and no problems, when it goes I have a brushless setup waiting!

I was thinking of just running the S600 on the 42mm and let the heat be what it is then go brushless when it dies like your plan.

I was thinking a 120 Turnigy ESC ( if I can ever catch one in stock at HK I get the email but when I go to the site they are all sold) and a KD36-60-08L 3000kv Brushless Inrunner. What do you have in mind for yours? I have been reading on here of torque roll issues with too much power on these hulls, I was only planning to run 2s or 3s with the KD 36 3000kv

[tunnelvision]

Peter,

Your setup is similar to mine. I plan on running a 60 or 90a Seaking (check valuehobby too for the 120, its US shipping) a pro boat 2900kv out of my shockwave with a x435 prop on 2s. I also forgot to mention I have converted to a .130 flex cable with liner already.. Runs smoother than the stock drive. Hope this setup will cause minimal torque roll. Also have a 3650-06 2300kv to try. Just going to wait till this setup fries then I will figure it out. Maybe I should try my cf45 to see how that would handle? Burn that motor up real quick!

[tunnelvision]

Peter,

Got my temp gauge and tried the Rio today. Not as hot as I had originally thought. After a 6 minute run on a 7cell 3000mah the temps were: 121 motor, 94 esc and 107 on the battery. Not bad imo, I had plenty of battery left too. Bet it would run cooler on the lipo.

[CaptPJB]

Sounds good, I now have mine down to 110F on six cells five minutes. The issue was binding in the drive shaft, at least after a realignment the temps dropped so I am thinking that was the problem.

Have not tries a lipo yet I would have thought with the more consistent power discharge delivery curve it would have run hotter rather than cooler? Let me know if you try it I will run a test on mine when I get a chance and will let you know how it goes.

Peter

[CaptPJB]

Sounds good, I now have mine down to 110F on six cells five minutes. The issue was binding in the drive shaft, at least after a realignment the temps dropped so I am thinking that was the problem.

Have not tries a lipo yet I would have thought with the more consistent power discharge delivery curve it would have run hotter rather than cooler? Let me know if you try it I will run a test on mine when I get a chance and will let you know how it goes.

Peter

Think you might be right on the lipo vs NiMH
Ran 4 minutes on a 2200mah 20c, speed was good better than the 2000 NiMH and temps were 110 F Motor. 98F ESC and 108F on the battery.( meant to come in at 3 minutes for a check but missed it)
Very pleased with the speed.
I'm thinking my Rio is about where I what it, will run a full five minutes next time to double check.
Will be great if it works out as the brushless route is $ plus you have the torque roll problems due in part I think to the narrow beam of the Rio and the extra power available , it overwhelms the hull. To me the Rio is a reliable 25 mph hull and above that there are compromises although it can be done. No GPS but my estimate is around 20+ mph with 7.4 lipo and S600 motor.

Peter

[tunnelvision]

Good temps. Been busy but finally had a nice day and some free time. I ran it on on my 2s 5000mah 30C lipo for 5 minutes and temps were 111 motor, 88 esc and 92 on the battery. Was real happy with that. When I got back home the cells were at 4v per. Not bad. Its just slow and I want more speed now. I ran my 25 prince and that hauls on 3s, I then drive the rio and its just cruisin' around time. I enjoy that though.

I did get a motor mount and some fiberglass to reinforce the hull so maybe over the winter I will convert it to brushless.

[tunnelvision]

Got bored the other night and converted it to brushless! Setup is a pro boat 2900kv motor, 60 amp seaking esc, .130 flex shaft with a x435 prop.
Ran it on 6 cell nimh for 4 minutes and my temps were real low. Esc was 68, motor was 71, and battery was 106 in 60 degree weather here in NJ. Figured I'd start out conservative and work my way up in speed to see how the hull handles. With this setup there was no torque roll and speed was much quicker than the S600. About the same speed as my shockwave 26 brushless with the same setup.

[CaptPJB]

Sounds good any estimate on speed?

I have the Turnigy ESC but still waiting for a 3660 2800kv to come in stock at HK. Will keep in mind an x435 as a starting point. Decided the 2800kv might be better bet than the 3000kv I had origvionaly thought about especially if I go to 3s

[tunnelvision]

I really need a GPS but I would say low to mid 20s with the 6 cell. It was fast enough to make me not want to try the lipo right away. I would guess it was probably hitting about 17 to 20 with the S600.

Now just a switch to 2s should be good for 30 with the brushless. I have 3 more batts to try. 7 cell nimh, 2s and 3s lipo. I will try to get my wife to take some video next time I go out to the lake and I will do a comparison.

[CaptPJB]

I really need a GPS but I would say low to mid 20s with the 6 cell. It was fast enough to make me not want to try the lipo right away. I would guess it was probably hitting about 17 to 20 with the S600.

Now just a switch to 2s should be good for 30 with the brushless. I have 3 more batts to try. 7 cell nimh, 2s and 3s lipo. I will try to get my wife to take some video next time I go out to the lake and I will do a comparison.

I would agree 17-20 with S600 may start at 20 fresh battery for about a minute then slowly drop back.
Looking forward to hearing how you do with a little more battery power and hull performance re torque roll. Maybe the x435 is the answer, the stock 42mm being too much prop?

[tunnelvision]

Alright, had a chance to test before but do not have any video. Hopefully this weekend for vids. Here are the results with the x435 prop. Each run was 5 minutes.
7cell nimh(3000mah) volts - motor 88, esc 82 and battery was 120. No torque roll at all. Speed was mph or 2 faster than 6 cell.
2s(5000mah, 30C) - motor 85, esc 71 and battery was about 80. No torque roll, slightly fast than 7 cell.
3s(4000mah, 20c) - motor 112, esc 98 and battery was 102. There was torque roll but it was held in check if you steered into it a tad. Speed = Awesome. Estimate in the low 30's.

I thinking 2s is the way to go with a slightly larger prop. I have a grim racer 36 x 55 that i need to get balanced and sharpened and I think this would be the ideal prop. Would give 2s a little more speed without sacrificing handling. Here's a pic of my internals.

[CaptPJB]

Alright, had a chance to test before but do not have any video. Hopefully this weekend for vids. Here are the results with the x435 prop. Each run was 5 minutes.
7cell nimh(3000mah) volts - motor 88, esc 82 and battery was 120. No torque roll at all. Speed was mph or 2 faster than 6 cell.
2s(5000mah, 30C) - motor 85, esc 71 and battery was about 80. No torque roll, slightly fast than 7 cell.
3s(4000mah, 20c) - motor 112, esc 98 and battery was 102. There was torque roll but it was held in check if you steered into it a tad. Speed = Awesome. Estimate in the low 30's.

I thinking 2s is the way to go with a slightly larger prop. I have a grim racer 36 x 55 that i need to get balanced and sharpened and I think this would be the ideal prop. Would give 2s a little more speed without sacrificing handling. Here's a pic of my internals.

Appreciate the info. I agree the sweet spot would appear to be 2S with a slightly bigger prop for the Rio with no hull issues.

[tunnelvision]

Haven't had a chance to get video but was able to test today with a different setup. I used a 36-50 2300kv motor, 60 amp seaking, 4000mah 3s lipo, and x435 prop. After 7 minutes of stop and start running, temps were all under 85. I think this setup is a winner. Way faster than 2s on the 2900kv motor. Can't wait to test my Grim 36mm, I hope I can get a few more mph without torqure roll. There was no torque roll at all here but I am running a tad wet. Need to find the right CG and get more 3s batteries!

[CaptPJB]

Interesting about the 3S set up being better, bears out the saying, more volts less amp runs cooler.

Curious to hear how the Grim 36 will do.

Peter

[tunnelvision]

Alright had a chance to take some video the other day. It was 52 degrees outside and no wind. Ran the Rio for over 12 minutes on my 4000mah 20C 3s lipo and there was still more in the pack. All temps were around 90 to 100. Got my grim prop which I will try next, this vid is with the x435. Tried moving the battery back but boat is still running too wet for my liking. I have room to move it back so I think I'll try that next. Also, ran my Supervee 27R which is in the vid as well.

Might go back to 2900kv on 2s with the grim prop and see how that runs. I have had a lot of fun messing around with this boat. Its held up well.

http://www.youtube.com/watch?v=SZwxMMSfCK8