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Losi 1/10 TEN-SCTE ARR 4x4 Short Course Truck Thread

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Losi 1/10 TEN-SCTE ARR 4x4 Short Course Truck Thread

Old 03-17-2014, 02:40 AM
  #46021  
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Hi all, i drive an SCTE, 50-100 c 6000 mha lipos, 5.5 t sensored Turnigy 550 motor and a Tekin RX8. You can see pix of my local track at FB Page Murgon RC. (Australia). Temps around 30-36 celcius. Thats air temp not motor temp Punch is down to 70 percent. No timing on the motor and a 16 tp. It is wicked fast. Not too many cars can catch it.

I am melting soldered wires, gluing deans connector together? I am at my wits end to work out a way to lower temps, Esc never temps out, motor dosent lose power but everything is real hot. It is even making a few of my older lipos start to swell.

All comments considered, children please abstain i would like opinion from people who know what they are talking about.

Cheers
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Old 03-17-2014, 04:44 AM
  #46022  
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I don't know a ton about the Turnigy motor but it seems like you are geared way too high. I don't run on any track that allows more than a 14 tooth pinion.
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Old 03-17-2014, 05:05 AM
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Originally Posted by Oztiger View Post
Hi all, i drive an SCTE, 50-100 c 6000 mha lipos, 5.5 t sensored Turnigy 550 motor and a Tekin RX8. You can see pix of my local track at FB Page Murgon RC. (Australia). Temps around 30-36 celcius. Thats air temp not motor temp Punch is down to 70 percent. No timing on the motor and a 16 tp. It is wicked fast. Not too many cars can catch it.

I am melting soldered wires, gluing deans connector together? I am at my wits end to work out a way to lower temps, Esc never temps out, motor dosent lose power but everything is real hot. It is even making a few of my older lipos start to swell.

All comments considered, children please abstain i would like opinion from people who know what they are talking about.

Cheers
The problem your experiencing is due to the deans not being able to handle the current demand of the motor and esc. Upgrade to ec5 or larger connectors which will have more contact surface and a tighter connection that won't cause them to heat up.
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Old 03-17-2014, 05:23 AM
  #46024  
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Originally Posted by Errokk View Post
The problem your experiencing is due to the deans not being able to handle the current demand of the motor and esc. Upgrade to ec5 or larger connectors which will have more contact surface and a tighter connection that won't cause them to heat up.
I too beleive thats your issue. Ive got Deans in mine and they have come unsoldered numerous times. I thought that maybe I sucked at soldering but everything else I soldeer has no issues and looks good too. I sent other post elsewhere that folks have had with the deans and high current loads. I am going to go straight from the esc to battery this season so no more connectors for me.
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Old 03-17-2014, 06:47 AM
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lol there's nothing wrong with deans. there's something else a miss here.
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Old 03-17-2014, 07:47 AM
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Originally Posted by Oztiger View Post
Hi all, i drive an SCTE, 50-100 c 6000 mha lipos, 5.5 t sensored Turnigy 550 motor and a Tekin RX8. You can see pix of my local track at FB Page Murgon RC. (Australia). Temps around 30-36 celcius. Thats air temp not motor temp Punch is down to 70 percent. No timing on the motor and a 16 tp. It is wicked fast. Not too many cars can catch it.

I am melting soldered wires, gluing deans connector together? I am at my wits end to work out a way to lower temps, Esc never temps out, motor dosent lose power but everything is real hot. It is even making a few of my older lipos start to swell.

All comments considered, children please abstain i would like opinion from people who know what they are talking about.

Cheers
You running deals 2 pin ultra connectors? Those should be able to take the load. I ran those for years with no problem and really they should be as good or better then most birdcage connectors we run. Multiple test show these are about as close to a zero loss connector as you can get.

Is it always the connector joint melting or at the motor solder tabs as well?

Have you ever found out what temp the motor is at?

Deans can be a little hard to solder to. Make sure you pretin the deans posts and get a good solder joint.

4wd SC on 2S is the hardest thing you can do to a battery. The amp draw is near double that of a 2wd 10th scale car so everything is working VERY hard to push these cars around on what is actually low voltage for the size of car. I recommend not taking batteries down to LVC in 4wd SC (actually ever in any car) as this can damage cells if they fall out of balance or one cell is weaker then the other. IMO high quality cells are a must for this class but even then you risk damaging them as the sustained discharge rates are so high for this class.
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Old 03-17-2014, 11:17 AM
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Deans are rated for 60 amps but some say they are safe to 100 amp. I am unsure what these power systems pull amp wise, but seeing 150 amp esc for a truck I'm thinking amps over 100 in some trucks and cars.
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Old 03-17-2014, 12:03 PM
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Originally Posted by Kaw1000 View Post
Deans are rated for 60 amps but some say they are safe to 100 amp. I am unsure what these power systems pull amp wise, but seeing 150 amp esc for a truck I'm thinking amps over 100 in some trucks and cars.
Continuous vs burst are very different ratings.

Deans claims (and again I have seen many articles confirm) they have the same restistance to 12 ga wires. all this assumes a good solder joint as well though.

http://www.wsdeans.com/products/plugs/ultra_plug.html
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Old 03-17-2014, 12:07 PM
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Good point thank you. BTW....what amps do these 4 cell setups pull for example a 1900 kv tekin on 4s?
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Old 03-17-2014, 12:21 PM
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thanks for all the comments I do appreciate them.

However surely the Deans Ultra plugs are not the cause of the esc and motor getting extremely hot? Plus the soldered joints are not coming apart its the actual connector fusing together to the point they have to be pried apart with a flat blade.

The esc does not thermal shutdown in a 7 minute race and from memory the esc fan does not come on a lot.

Thanks for the comment re the batteries taking a pounding in these things. It makes sense that we are pushing equivalent to 1/8 Buggies around on 2s2p batteries.

I will also try a 13 tp with the Turnigy 5.5 and also with a Castle 4 Pole. (4600Kv I think).

Gotta say, used to race 1/8 gas then elec but 4x4 Sc Class is awesome. Maybe this car makes it awesome, love it.
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Old 03-17-2014, 12:26 PM
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Originally Posted by Kaw1000 View Post
Good point thank you. BTW....what amps do these 4 cell setups pull for example a 1900 kv tekin on 4s?
I use less mah on my 8th scale for the same length race then with my SCTE. The reason is you get you power from the voltage increase.

I know this will sound weird but if your batteries are not up to the task it can cause all sorts of issues with your electronics. Now causing your connectors to fuse have not heard of that one yet. I do know batteries with low amp output can hurt your electronics. I don't know the scientific reason as I am not an electrical engineer (I am a mechanical however) but I have been told by many people I trust know what they are talking about that this can cause all sorts of issues.
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Old 03-17-2014, 07:31 PM
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I want to replace my shocks as cosmetically they are nasty looking and one is stripped out. Is there any other options besides stock? I will use the metal shock caps that are on mine and metal shock collars. Going to rebuild with mip kit.
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Old 03-17-2014, 07:33 PM
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Tlr 2.0 shocks are what's on my scte
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Old 03-17-2014, 08:21 PM
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Originally Posted by 84 GT 5.0 View Post
Tlr 2.0 shocks are what's on my scte
These?
http://www.ebay.com/itm/like/191096393994?lpid=82
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Old 03-17-2014, 09:39 PM
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No the shocks off the tlr scte 2.0
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