Mamba Max fan??
 

I am contemplating running a fan on the Mamba Max due to me going to be running 4s on it with my Neu 1.5d. I have a MMM on order but you know the deal with that. So my question is what fan and where does it plug into? I am going to be running the CC BEC as well. Thanks

I used 25mm novak fans. They plug into the receiver. If you are running the 1.5d, you will want to run two fans. One on the heat sink and then cut a hole in the case and run one blowing directly onto the esc board. The 1.5d is a very powerful motor and pulls a lot of amps, so you want as much cooling as possible on the ESC.

Two fans doesn't make much sense to me, particularly since the heatsink is bonded directly to the FETs, where all the heat is generated...and they're only on one side. Not to mention your mod will most likely void the warranty. There are people running HUGE motors (Neu 1527 1D) with the stock setup and have had no heat problems.

I'd run it first before hacking the crap out of the case.

Thanks that is the idea I have. If I have heat issues I will add a fan. Thanks for the input.

I suspect you will need the fan(s). I used a Y harness to hit the batt slot on my Rx since I needed to plug in a PT too. I cut the +/- wires from the CC BEC to the Rx and spliced in leads for my fans there. Had a couple of Integy (yuk) heatsinks with fans sitting around and used those. One already died, but there cheap and Integy, so what would you expect. 30x30x6.5mm 7.2V is what I had, and BEC is set to 6v so i ordered a couple of 6v ones to keep me going until my 3Ms come back. If you don't beat them to death I suspect they would last a little longer anyway.

I used a Novak fan on my MM that plugs into the receiver. It lowered my ESC temps from the 135º-145º range to around 110º running on a 2s lipo

So you lowered your temps from perfectly fine to really low, and got to waste runtime because of it. MMmmmmmmmk.

No problem man. Many times people waaaaay over-react before they see how things are actually going to perform. I like to see how things work first before i hack the poo out of them. :)

Wow what a negative attitude. The tiny amount of current the fan draws is not effecting my run time at all. Even if it did with summer coming on it would be well worth the piece of mind it gives me knowing the ESC is staying as cool as it can.

i agree with dad. seriously, that extra cooling would probably add to the efficiency, and you would probably get a longer life out of the MM that if you had no fan...

4s on MM in 3905 with Neu 1512 1Y, geared 18/68 (with CC BEC) runs in the 140s with twin fans and holes in the case. Loose one fan and it thermals in a couple of minutes, so I'd say the twin fans are what I need on mine. Heat increases resistance in electrical circuits/systems. If you can keep it cooler, you will waste less power on internal resistance, which will cause more heat as resistance goes up. Do the fans IMO.

2s??? So you finally came over to the dark side? How do you like the performance of the lipo over the nimh? I think I'm going to get me one of those fans for mine. I've hit 200+ more times than I havent. Is that the one they have on tower?

He will need fan(s) for sure. For the second fan (if needed) he doesn't have to "hack the crap" out of it. Just some holes. Running 4s voids the warranty, so that's not an issue.

You may get away with one fan, but the 1512 1.5d is a very power hungry motor and is very demanding on your ESC and batteries.

I race my rc8 which tends to be harder on the ESC/motor than just bashing/street runs, so two fans is a little extra insurance. My temps dropped about 10-20 degrees from the second fan on the bottom of the ESC. I have never thermaled my Mamba.

It isn't hacking up anything. Just cut an equally sized hole in the bottom of the case for the fan and screw the fan on. Takes all of five minutes to install.

I've been there, done that, and got the t-shirt. Just trying to save you a future headache.

Yes I finally went with a lipo. I like the longer run times and cooler battery temps most of all I like the difference the weight saving made in the way my truck handles.

Negative? How is pointing out pointless mods negative? What you did offers ZERO benefit, and actually creates a performance hit.

I wouldn't even consider a fan unless my ESC ran 180, I had tried everything to lower it and had no success. I run in Houston (yeah, where the real summer is) and I've not had ANY heat problems EVER running 2S. Putting a fan on a mamba 2S system is just laughable.

I guess if it makes you happy, go for it.

Well I had to put a fan on mine. I ended up buying another brand new one and swapped them out and put the deans connectors on just to see if that may have been a issue. Same thing, up around 200 degrees within minutes with all my settings as low as they go. I put the novak fan on and temps were around 130-140. Ambient temps here were 72 degrees when running. I am running a Tekno Neu, 2s 8k lipos, (4s), 22/58 gearing, CC BEC.

its only 72 degs....when I wake up @ 0700 its pushing 90 degs here....:-0

Believe what you want I am a firm believer in cooler electronics work better for longer. You thinking the tiny little fan is going to hurt performance is what is laughable.

Hasn't been to bad here yet this year, but 100dF with 99.9% humidity is not unusal for a St.Louis summer. I probably wouldn't need a pair of fans for a 1/10 2wd ST, but a 3905 Maxx on 4S puts a little more heat in the ESC.

Anyone know what the CFM is on the standard MMM fan?

I found a 5v 30x30mm magnetic levitation fan that I have on my MM running 4s with a Neu 1515/1.5d.This fan puts out 4.9 cfm compared to a novak at 2.5cfm.

Where did you buy this fan? pics?

Also a question, I just manage to ARM my MM with 16.5V (5S a123) even with a custom Voltage cutoff :) anyway, do you think I can use the red wire from MM to power the fan (only) and still run 5S A123?

This Sunon fan actually use magnetic levitation to "float" the spinning fan blade in a magnetic field to dramatically reduce friction, wear, and heat; making these fans run cooler, quieter and last longer than conventional fans. Ideal for use in any mission critical application, in applications where minimal fan noise is desired.This is a direct description from the Buyextras.com.This fan puts out double CFM then the Novak 2.5cfm 4.9 cfm compared to the Novak.I run my fan off the receiver and run 4s 14.8 and a CC BEC.I run a neu 15151.5d/f.I run my Brushless 8T in 80 degrees outside temp for 30 minutes and no thermal issues.:party:






http://img380.imageshack.us/img380/5...2225617lf0.gif

Thanks for the Fan info. For the Fan power source I also use the Rx but I was hoping to use the BEC of the ESC since its just a small fan but I guess it will be safer to jsut use the RX to power the fan

Heres a photo of my 30mm Magnetic Levitation fan on my MM.This little baby puts out 4.9cfm.:whistle:


http://img401.imageshack.us/img401/1...4096ck4.th.jpg

where can i get one of these???

How much does that cost and where did you get it from?

$15-$20 posted i would get one... and hope it wouldnt break. anything more and i probably wouldnt bother seeing as i can get 5 and 12v fans for $7, sometimes with a cheapo heatsink!

are these available worldwide as ive never seen or heard of them before

This is the page address its from buyextra.com:whistle:
http://www.buyextras.com/su30dc5vmale.html

great.. i cant buy anything from there, even the tazer :(

any other sites which do international shipping for a similar item?

Thanks for the link. I'm glad they ship to military addresses even though this was on their website," We only ship to USA 50 States, Virgin Island & Puerto Rico. We do not ship to APO, FPO or International Addresses"
:party::mdr:. :party::mdr:.

double post

Phatmonk
 

I was looking at your picture of the cooling fan on the MM. I see the heads of 2 screws or bolts. How did you attach it to the heatsink?

They are threaded into the heatsink with old shockpistons as spacers between the fan and the heatsink.

Another option for fans. Cheaper than the novaks and probably better Link.

The novaks have 2.8 cfm those have 1.3 cfm, I looked them up when monk 1st posted up the sunons because I have a box full of laptop fans and 133mhz memory lol from when I used to do computer recycling. The ones in his link are about as good as it gets for the size.

Oops. I stand corrected.

Did you use a thread tap? If so, what size? Thank you for your help

The screws should just wedge between the fins on the heatsink.