RCCrawler Forums

The Violator · 08-18-2009, 10:22 PM

Is anyone running 4 cells to thier FXR? While rebuilding my car I found the issue I have been having for the last few months. The on off wires to my Mamba Max were torn almost completely off. A small tig and they were done. I tried to solder them back, but its a done deal. The MM has to go back to castle. I would love to send it in but there is a 3 week turn around. I need it this week for worlds. I would love to run the FXR if it can handle the 4 cells, otherwise I am gonna scramble to get in some new 3 cell batteries and an FXR.

Rockcrawler · 08-18-2009, 10:27 PM

Never tried a FXR on 4 cells.

I will be at Worlds and do have a spare though if you need it.

ultimate_monkey · 08-18-2009, 10:43 PM

well according to the tekin wesite input voltage is 2s, unless used with a 35t or higher motor, then its 3s safe.... so i have a feeling 4s would cook it..

http://www.teamtekin.com/fx.html

krawlfreak · 08-18-2009, 11:31 PM

Unfortunately you already know the answer to this, but if it makes you feel better to have someone tell you it will work, go for it. I run mine with 3s and 25 turns and its great. I guess the real question is will tekin warranty it?

EeePee · 08-18-2009, 11:36 PM

Quote:

Originally Posted by krawlfreak

I guess the real question is will tekin warranty it?

Not if you keep talking about it.

krawlfreak · 08-18-2009, 11:43 PM

Nabil · 08-18-2009, 11:46 PM

ted if its the switch you are talking about, you should be able to lay some solder across the 2 contacts on the board. the truck will always be on when its plugged in. otherwise, if you want, i can priority mail you a mamba max in the morning for you to run at worlds. fxr+4s=boom

The Violator · 08-18-2009, 11:47 PM

Quote:

Originally Posted by krawlfreak

Unfortunately you already know the answer to this, but if it makes you feel better to have someone tell you it will work, go for it. I run mine with 3s and 25 turns and its great. I guess the real question is will tekin warranty it?

If I had the answer I would not have asked the question. My SC10 has the r1pro and its rated for 3s and guys are running it on 4s in 1/8th scale. Maybe you should go back to your Super Gay.

crash · 08-19-2009, 12:00 AM

Quote:

Originally Posted by trucknuts

If I had the answer I would not have asked the question. My SC10 has the r1pro and its rated for 3s and guys are running it on 4s in 1/8th scale. Maybe you should go back to your Super Gay.

Maybe read the specs on the ESC next time

The Violator · 08-19-2009, 12:37 AM

Quote:

Originally Posted by crashfab

Maybe read the specs on the ESC next time

again, I read the specs. But I asked if anyone was running 4s lipo on an FXR. I did not ask what size it was, I did not ask if it came in blue, I did not ask what tekin says it will do, I asked what other people have, or have not done.

The Violator · 08-19-2009, 11:05 PM

Quote:

Originally Posted by e-hills4x4

ted if its the switch you are talking about, you should be able to lay some solder across the 2 contacts on the board. the truck will always be on when its plugged in. otherwise, if you want, i can priority mail you a mamba max in the morning for you to run at worlds. fxr+4s=boom

I called Tekin this morning and they said that as long as I run a external bec, the voltage should not hurt it. They told me that they had never done it, but it would probably work, just watch the temps and I should probably run a pack or 2 before I head out to worlds. And I should call them to let them know one way or the other.

But after starting my rebuild today I found that the 4s lipo does not quite fit on the front links. Its just like me, a bit to thick. I might give the uppers a little bend to get it in there.

And thanks for the offer, but I am going to try to borrow another ESC to have as a back up just in case.

Nabil · 08-19-2009, 11:17 PM

Quote:

Originally Posted by trucknuts

And thanks for the offer, but I am going to try to borrow another ESC to have as a back up just in case.

no problem. i should have a couple with me anyways if you need it. we are staying in the same hotel, so i shouldnt be too hard to find

wrightcs77 · 08-20-2009, 05:52 AM

I did read on here somewhere of someone running 4s in their FXR. I myself have never tried it.

robertrocha6 · 08-20-2009, 12:55 PM

I used to run a 35 turn and 4 cell lipo on my Wreckluse with no problem. The moor did run alittle hot but with a smaller pinion you should be ok.

Aussie Nerd · 02-08-2010, 12:56 AM

Did anyone every try this? I want to give this a go when the super berg is done, but I don't fancy sending $200 worth of electronics up in smoke

Kieren

MOTORRAD · 11-28-2010, 10:50 AM

Dont want to start a new thead.. So dragging up this one that is closest...

Has anyone run the FXR successfully on 4s lipo?

I am reminded of when the MM fist came out, and we all were running them with more than the reccomended cell count, simply my dissconnecting the internal BEC (as per castles reccomendations)..

I am thinking that on the FXR, if they rate it for 35T motors, on 3s... that they are taking into account you will be using their internal BEC which generates ALOT OF HEAT..... just like castle did... and by not using their BEC... you are safe to jump up on voltage.. Id especially think this to be true on a crawler, as your not running WOT all the time...

Diamond D · 11-28-2010, 11:41 AM

I just got my dual fxr's and I will be running them on 4s. I think all you need is a capacitor and nova's ark is selling them. http://www.crawlerinnovations.com/in...=products&id=6

Not sure if the esc's are gonna last so I am curious as well to see if anybody is running this.

MOTORRAD · 11-28-2010, 11:55 AM

Quote:

Originally Posted by Diamond D

I just got my dual fxr's and I will be running them on 4s. I think all you need is a capacitor and nova's ark is selling them. http://www.crawlerinnovations.com/in...=products&id=6

Not sure if the esc's are gonna last so I am curious as well to see if anybody is running this.

curious what the specs are on the stock CAP... Id think it has enough voltage rating...

Diamond D · 11-28-2010, 12:03 PM

I'm reading right off the stock capacitor and its 330 16v and the nova's ark capacitor is 25v 1000 uf. Not sure what all that means but there are the specs.

MOTORRAD · 11-28-2010, 12:39 PM

Quote:

Originally Posted by MOTORRAD

curious what the specs are on the stock CAP... Id think it has enough voltage rating...

Just looked. stock cap is 330. and 16V... so on 4s that is pushing the V limits..

Definatly need to upgrade the CAP if running 4s...

EDIT:...

didnt see you postd up the specs Diamond..

the 1000 and 330 is the ammount of power it will store. and let loose.... (capacitance) (umph. in normal terms)..

the voltage is simple.. its the voltage it will handle before she goes BANG... if your anywhere near the volt limits on a cap. you need to go up..

deffinatly the stock cap wont be happy or safe on 4s...

heading to radio shack today to see about a cap... (impatiant to order one)..

On a side note... I just ran my crawler, (3s lipo, 35T HH machine wounds).. on front dig for 10min straight WOT around the house, carpet, tile, floormats. etc... and it was hardly noticble over room temp... so I think Im good in that department.... Now my truck weighs in at 4lbs 13.5oz so that could effect things if your heavy..

EDIT AGAIN..
one of these puppies should do it.. depends on how much capacitance you want..

http://www.radioshack.com/product/in...tic+capacitors
http://www.radioshack.com/product/in...tic+capacitors

personally Id run the 1000MF one... as it will take more load off of the batt pack...

08-18-2009, 10:22 PM	#1
The Violator RCC Addict Join Date: Apr 2009 Location: Token's life matters Posts: 1,836	Tekin FXR and 4 cell Lipo Is anyone running 4 cells to thier FXR? While rebuilding my car I found the issue I have been having for the last few months. The on off wires to my Mamba Max were torn almost completely off. A small tig and they were done. I tried to solder them back, but its a done deal. The MM has to go back to castle. I would love to send it in but there is a 3 week turn around. I need it this week for worlds. I would love to run the FXR if it can handle the 4 cells, otherwise I am gonna scramble to get in some new 3 cell batteries and an FXR.

08-18-2009, 10:27 PM	#2
Rockcrawler I wanna be Dave Join Date: Jan 2005 Location: Hueytown, Alabama Posts: 6,777	Never tried a FXR on 4 cells. I will be at Worlds and do have a spare though if you need it.

08-18-2009, 10:43 PM	#3
ultimate_monkey Rock Crawler Join Date: Mar 2009 Location: Victoria BC Posts: 988	well according to the tekin wesite input voltage is 2s, unless used with a 35t or higher motor, then its 3s safe.... so i have a feeling 4s would cook it.. http://www.teamtekin.com/fx.html

08-18-2009, 11:31 PM	#4
krawlfreak I wanna be Dave Join Date: Aug 2008 Location: Having fun again... Posts: 2,641	Unfortunately you already know the answer to this, but if it makes you feel better to have someone tell you it will work, go for it. I run mine with 3s and 25 turns and its great. I guess the real question is will tekin warranty it?

08-18-2009, 11:43 PM	#6
krawlfreak I wanna be Dave Join Date: Aug 2008 Location: Having fun again... Posts: 2,641

08-18-2009, 11:46 PM	#7
Nabil no talent hack Join Date: Feb 2007 Location: Redwood City Posts: 2,479	ted if its the switch you are talking about, you should be able to lay some solder across the 2 contacts on the board. the truck will always be on when its plugged in. otherwise, if you want, i can priority mail you a mamba max in the morning for you to run at worlds. fxr+4s=boom

08-20-2009, 05:52 AM	#13
wrightcs77 RCC Addict Join Date: Feb 2005 Location: Minneapolis Posts: 1,496	I did read on here somewhere of someone running 4s in their FXR. I myself have never tried it.

08-20-2009, 12:55 PM	#14
robertrocha6 Newbie Join Date: Jun 2008 Location: Houston Posts: 46	I used to run a 35 turn and 4 cell lipo on my Wreckluse with no problem. The moor did run alittle hot but with a smaller pinion you should be ok.

02-08-2010, 12:56 AM	#15
Aussie Nerd RCC Addict Join Date: Jun 2009 Location: QLD, Australia Posts: 1,512	Did anyone every try this? I want to give this a go when the super berg is done, but I don't fancy sending $200 worth of electronics up in smoke Kieren

11-28-2010, 10:50 AM	#16
MOTORRAD Pebble Pounder Join Date: Oct 2004 Location: San Diego Posts: 128	Dont want to start a new thead.. So dragging up this one that is closest... Has anyone run the FXR successfully on 4s lipo? I am reminded of when the MM fist came out, and we all were running them with more than the reccomended cell count, simply my dissconnecting the internal BEC (as per castles reccomendations).. I am thinking that on the FXR, if they rate it for 35T motors, on 3s... that they are taking into account you will be using their internal BEC which generates ALOT OF HEAT..... just like castle did... and by not using their BEC... you are safe to jump up on voltage.. Id especially think this to be true on a crawler, as your not running WOT all the time...

11-28-2010, 11:41 AM	#17
Diamond D Rock Crawler Join Date: Mar 2009 Location: AZ Posts: 789	I just got my dual fxr's and I will be running them on 4s. I think all you need is a capacitor and nova's ark is selling them. http://www.crawlerinnovations.com/in...=products&id=6 Not sure if the esc's are gonna last so I am curious as well to see if anybody is running this.

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11-28-2010, 12:03 PM	#19
Diamond D Rock Crawler Join Date: Mar 2009 Location: AZ Posts: 789	I'm reading right off the stock capacitor and its 330 16v and the nova's ark capacitor is 25v 1000 uf. Not sure what all that means but there are the specs.

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