Speed Passion Reventon-R Problems

[Muzzie]

Please could anyone give me some advice as I’ve been having a few issues with my new SP Reventon R ESC and SP V3 7.5t motor set-up.

I installed this into my Cougar SV using the kit standard spur gear and 23t pinion. I’ve run the car indoors for 3 week at my local club with no issues and was really impressed with its performance . However, 2 weeks ago I ran at the east mid regional’s (West Bridgford) and in the first heat after two rounds of practice, the car stopped. My first thought was the thermal protection had cut in because it was a hot day. I checked the temperatures ESC = 56◦C and Motor 62◦C, all in normal parameters. In round two, the car seemed great until the last lap, where the car, didn’t stop but acted like the lipo was flat. Again, I took the car off the track, check the temperature and lipo battery (SP 6200mah 65c 2 month old) all was fine, I switched the ESC on and off and the car burst into life again. To try in fix the problem, I re-binded the receiver and ESC to the radio. This seemed to work and raced the rest of the day problem free.

After a frustrating day, I thought it might be worth updating the firmware to see if that would solve the glitch. After hours of messing about, it was done. I ran the car last night at my local club and for an hour of hard practice the car was faultless. However, again in round 1 the car started to glitch, but this time, when I released the throttle the car would surge forward on its own. (For INFO I have a power cap fitted). Again, I re-binded and all was well.

This is start to really grind my gears and I’m not sure what else to do apart from return the ESC to the shop, but this will mean I will be without a car for about a month and I think it would be impossible to diagnose.

Any ideas?

[Androiddave]

Have you had any luck with this?? I have the exact same problem!

My mate runs the same and his runs perfectly fine!

[Big paul]

Are you running lipo cut off. It my be as you are accelerating the lipo may be briefly dropping below your settings. Thus sending the ecs into sensorless mode, ie like the lipo is flat.

[Aran]

Might be a worth an email or call to Schumacher if its a common problem. They will be able to help

[Androiddave]

I spoke to schumacher and speed passion and both have said its a faulty motor no doubts!

I have sent mine for repair today so fingers crossed it solves the problem.

[JustARcFan]

With what motor did you have this problem?

[Androiddave]

Speed Passion v3 6.5t.

[Cardnim]

Keep us updated when you hear back - would be really useful to know if that cures the prob.

Good luck

[JustARcFan]

Seems that there is only a problem with motors like a 6.5 or lower.

I did some testing with mine and I only had problems with my LRP X20 6.5.
With the SP 7,5 and 8,5 everything is fine.

[Androiddave]

Yeah My mates got the same set up but with a 7.5 and no issues.

Should of chucked my motor in his car before sending it off really.

[Muzzie]

I'm running SP 7.5 V3 and after I updated the firmware for the 2nd time I've not had a problem (touch wood). Also for info, I have the Lipo protection turn off.

When I contacted Schumacher they gave me no advice other than return it and we with take a look .

I'll keep you updated

[Androiddave]

This could be another problem then! I have updated my firmware but my friend hasnt!

I did not run mine before though so cant say for sure that it is that.

I will see what they say when my motor comes back.

[JustARcFan]

The reventon R also only has an output of 70amp.
This combined with a Savox servo could also have something to do with it.
Maybe this is also an issue when going for a 6.5 or lower??

[Androiddave]

Just got off the phone to JE Spares and schumacher have tested my motor with no issues found! So next step is to rule out the savox! I have also bought a power cap to see if that helps. I will keep you updated.

[Androiddave]

Ok, So here is the results!

Motor back after being tested as 100% fine! Put it back in the cougar along with the glitch buster and it still cuts outs!

My next step is thermal cut off! Will it be safe to turn off??

Cheers

[russmini]

What about the LiPo cut off? If you only ever race for 5 mins or so, then take it off, that could be your problem...

[Androiddave]

I dont think it can be that! I checked the battery the moment it cut out and it had 3.85v per cell.

Cut off is on 3.2....

[RudolfXC]

Originally Posted by Androiddave

I dont think it can be that! I checked the battery the moment it cut out and it had 3.85v per cell.

Cut off is on 3.2....

The battery is probably close to being dead at that Voltage as you are measuring it open circuit but not under load. Under load, a battery with low rating will probably dip to 6.4V with a low turn motor.

[russmini]

Unless you were sat in the car or had measuring equipment on board, you would not have been able to measure it when it actually happened. Maybe within 20-30 seconds, after you'd ran off the rostrum, took the body off, got a volt checker and then checked it...

Turn it off and see how it goes. Then you'll know for sure.

[mes]

When I wanted to get a Reventon R at Speedpassion Europe, Toni Rheinard did not want to sell me one due to the immense software problems and recommended getting the GT2.0Pro instead (which of course does not properly fit in my B-Max2). AFAIK the next big update is scheduled for early August, and I keep my fingers crossed that it will fix your problems and gives me the opportunity to get a glitch-free Rev R; the GM Recing Genius Sport 80R/120R also seem nice and small enough (very similar to or maybe even identical with the Vampire Racing ESCs).
In the meantime I'll speed up my Cirtix-controlled Yoke with a 9.5 Thunder Power motor, the 13.5R will be an upgrade for my son.