Mamba Max fan?? - RC-Monster Forums

Jeremy1976 · **Mamba Max fan?? -** 06.18.2008, 02:41 PM

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

06.18.2008, 04:30 PM

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.

sleebus.jones · 06.18.2008, 06:53 PM

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.

Jeremy1976 · 06.18.2008, 09:13 PM

Quote:

Originally Posted by sleebus.jones

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.

Wakesurfer · 06.18.2008, 10:18 PM

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.

sleebus.jones · 06.20.2008, 01:38 PM

Quote:

Originally Posted by Jeremy1976

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

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. :)

Happywing · 06.26.2008, 07:20 AM

Quote:

Originally Posted by sleebus.jones

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.

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.

Dadx2mj · 06.20.2008, 01:35 PM

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

sleebus.jones · 06.20.2008, 01:36 PM

Quote:

Originally Posted by Dadx2mj

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.

Dadx2mj · 06.20.2008, 03:46 PM

Quote:

Originally Posted by sleebus.jones

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

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.

tc3_racer_001 · 06.20.2008, 07:56 PM

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...

Wakesurfer · 06.20.2008, 09:59 PM

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.

sleebus.jones · 06.27.2008, 08:35 PM

Quote:

Originally Posted by Dadx2mj

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.

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.

Jeremy1976 · 06.27.2008, 09:03 PM

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.

Dadx2mj · 06.28.2008, 11:39 AM

Quote:

Originally Posted by sleebus.jones

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.

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.