You guys are making me nervous here now.....what esc model do you guys run?
I'm about to order the Viper stuff....down here in Texas it is HOT already.

It's gonna be tough for any esc/motor here in summer.

Yes it will be 6s capable. No release date yet though, we're still in testing and development stages.

Start with pre-set profile #1, should be a good starting point. Maybe increase the throttle PWM freq to 9600hz to drop the motor temp some.

Unfortunately some esc's from the first two production batches had stability issues as some of you have experienced. We have addressed the cause of the issues and everything coming out of the factory now will be much more reliable.

62/12 i am using the stock profile 1 no boost or timing on motor. Throttle EPA i tried was between 70 and 90 to see if that would help. No go. I am ready to send her back in in hopes that it is just something wrong with this one but dont want to if i dont have to.
THanks the help.
JT

The only way to revert back to the default settings is by reloading the firmware onto the esc, which you'll need the pc link to do. Try these throttle/timing settings:

Acc boost:
4500-12,500rpm @ 20* max adv timing

top speed timing:
3*/1000rpm @ 35* max adv timing

throttle:
5000hz
100% punch
linear curve
narrow deadband

There's about a 50* split between the internal thermal cutoff temp and exterior case temp. 220* cutoff should usually cut motor power around 170-180* case temp. In the 4x4 trucks it's common to see them around 140-160, same with mod tc.

180-190 is pretty high, though I have seen a +/-20* range using 3 different temp guns on the same component... Try using a different temp gun, because if it's measuring 190* case temp it should probably be hitting thermal cutoff.

In terms of actually dropping the esc temp try a lower throttle and brake pwm frequency. What sort of air/track conditions are you running in?

Check your solder connections to make sure there are no bad joints. Check your motor sensor and sensor wire as well, perhaps try a different motor first since that's usually easier than trying a different esc. You need to start troubleshooting your setup at this point. For a 4.5t 550 you'll probably want the drive pwm frequency between 4000-9600hz. That esc temp however is not a concern with the heavy truck and big motor, pretty much where you'd expect to see it.

What sort of air and track conditions? Did you confirm the esc/motor temp with another temp gun? You won't see thermal cutoff at 150* case temp if it's set to 230*, that's too much of a split. But you're measurement isn't the issue here, the issue is hitting thermal cutoff. Give us your settings/setup or perhaps even a photo of your setup so we can try and troubleshoot a bit farther.

Just put the answer in your sig... IN HUGE RED LETTERS LIKE THIS!!!:eek:

Thanks Weylin, I will start with the Throttle PW setting first, then work my way back if the issue persists..

Weylin,


Any plans to make a 4 pole motor for the 4x4 SC's? They seem to handle the rigors of 4x4 SC better than the 550's.

Been running the buggy 1800 in my TQ buggy, 18/46 gearing with 27* of timing on an RX8. Ran all day Saturday without a hitch, started at 17/46, and it was pretty quick, coming off after 10 minutes at about 150*. I needed a hair more power so i just bumped up one on the pinion. Motor got a little bit warmer (180*) after 10 minutes, but wasa running great and did not get soft. After qualifying for the day, I went out for some extended practice. I ran for about 20 minutes straight, and temped the can at 195. Not bad for 20 minutes of race pace practice. it never got soft either. I am running 2 2s Speedzone 5700 50C packs, Tekin RX8. After 20 minutes, i put 4000mah back in the batteries, so the motor/speedo seem to be pretty efficient.



Also have been doing a bit of testing with my 550 5.5 in an SC10 4x4. Back to back against a Tekin 550 5.5, this motor is hands down faster and stronger. The Viper would clear our huge double in Topeka, while the Tekin would not. The tekin was also thermaling my VTX10R. The Viper was not. It was warm, but not hot like the Tekin motor.

Im glad to hear that, because i have the tekin 4.5 and seems to run kinda hot. Going to pre-order the viper motor, cant wait to put it in my truck.

Premierehobbies.com ;)

Thats where I ordered my 10r, unfortunately it didnt work but thanks to viper for their great help, cant wait to get my 10r back. But ill definitely order there. :D

Sorry about that... seems like a few of them came out DOA... but that should have been fixed by now.

Thanks for the info. I am flumoxed as to what is happening. Everything is free moving as i just went through and checked with no motor. The joints on the esc are good secure although you might not me able to see the motor ones here with the shrinkwrap but the batt wires are there and look good to me. I have mounted a fan as you can see and hope this helps
http://i98.photobucket.com/albums/l2...h_24d200bb.jpg
http://i98.photobucket.com/albums/l2...h_1c34385f.jpg
http://i98.photobucket.com/albums/l2...h_5dfce03a.jpg

sweet, just cant wait for the 8th scale esc to come out. Thats one thing im really excited for.

You are going to love it... will easily be the smallest 8th scale speedo on the market