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Old 02-11-2014, 07:10 PM   #1
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Unhappy over heating ORCA TX17.5

Here is my problem: My 17.5 Orca TX heats up all the time,I drive a Mi5 with a 70 spur in blinky mode our track as 14 turn an a 85 foot back strech. So far I have tried pinions from 30to 34 with high timing and low. My ECS is a Reventon pro1.1
Thanks forthe help.
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Old 02-11-2014, 07:15 PM   #2
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Here is my problem: My 17.5 Orca TX heats up all the time,I drive a Mi5 with a 70 spur in blinky mode our track as 14 turn an a 85 foot back strech. So far I have tried pinions from 30to 34 with high timing and low. My ECS is a Reventon pro1.1
Thanks forthe help.
Start with your final around 4.0-4.2 and temp it from there. Timing at 20. If you want to get closer on your ratios, go with 64pitch gears.
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Old 02-11-2014, 07:16 PM   #3
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Quote:
Originally Posted by srobidoux View Post
Here is my problem: My 17.5 Orca TX heats up all the time,I drive a Mi5 with a 70 spur in blinky mode our track as 14 turn an a 85 foot back strech. So far I have tried pinions from 30to 34 with high timing and low. My ECS is a Reventon pro1.1
Thanks forthe help.
When you say heats up how hot? They can take some heat and be fine. I would say 160 or so is ok. There could be many things that might cause it. Check for binging ind bearings or the drive train first off.
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Old 02-11-2014, 07:17 PM   #4
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Quote:
Originally Posted by srobidoux View Post
Here is my problem: My 17.5 Orca TX heats up all the time,I drive a Mi5 with a 70 spur in blinky mode our track as 14 turn an a 85 foot back strech. So far I have tried pinions from 30to 34 with high timing and low. My ECS is a Reventon pro1.1
Thanks forthe help.
Try a 96-100 with a 4.0 final drive make sure your car is free oil the bearings in your car make sure its free try a timing of max

I drive a 6.2 with a revention 1.1 and an orca 17.5 tx with a superior hobbies f5 fan what tires are your running do you have too much traction I was having the same issue it was between the tires and having too much traction and needed a good fan my track is 60-36 we have a rather long straight probably 96 feet long or so
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Old 02-11-2014, 07:24 PM   #5
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That FDR checks out to be 3.7-4.2 which is alright.

I have mine at 1mm past the highest mark. And FDR at 3.72. Our track is more open than yours though. 10-12 turns.
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Old 02-11-2014, 07:28 PM   #6
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70t pinion! you going for top speed! 14 turn track you'll find it better with a smaller pinion. cut it to 1/2 35T. You'll find coming off corner better, and heat of the motor comes down. experiment! Half the straight you'll see at its top speed, instead of it climbing for speed.
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Old 02-12-2014, 03:08 PM   #7
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Go to a smaller pinion/bigger spur, and also check your driveline. Make sure it moves free without binding.
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Old 02-12-2014, 08:11 PM   #8
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Thanks for all the replies I will try some of your sugestion.
P.S. there is no binding in the drivetrain, with the same set up an my friends Tekin Gen2 I manage laps one second faster. Its a new motor and i would like to make it work for me.
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Old 02-12-2014, 08:22 PM   #9
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Do you have a temperature gun to check the motor temps? You're best bet it to buy one and monitor the motor temps for each adjustment you make. Make sure there is a "tick" of play between the spur and pinion gear. If you have the two gears mashed together, that can cause unwanted friction which will generate motor heat.

Also, drive the car for 2 mins then temp and then adjust the gear ratio and motors timing.

Are you running any advanced timing from your Reventon Pro?

I am running the same setup with no problems at all.
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Old 02-12-2014, 09:05 PM   #10
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if you've overtemped the motor a number of times, chances are the rotor has lost its magnetism... if so, no matter how you adjust your fdr and timing the motor will still run hotter than usual...
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