When the 5s1p packs come off the buggy they read about 9.8-10.2 volts.
That seems to be in line with what you are saying.

what is your cutoff setting?

Also, got pics of your setup?

got my lipo installed true rc14.8 8000 and it ran for two minutes!!!!!!! The buggy was going for a test run across a parking lot I made two high speed passes and then it locked up. It would not move. I got it back home and the motor was smoked......it is a feiago 7xl......does anyone have any idea what the warranty is on this motor so I can get it replaced and buy a neu? What would be the recommended neu motor to buy? I have a hyper 7 with a 47 tooth spur and a selection of pinions from 13 to 16 I am running a mamba max and 4s lipos.

sounds like ur MM's cutoff voltage is about 13.9v... could you check to see what it is?

Definitely check your cutoff voltage. But your motor probably smoked from getting a rock stuck in the gears. A good Neu for you on 4s would be the 1512/2.5d (2000KV).

I would thoroughly check everything. Your car sounds like it has an issue. Check that the car rolls freely without the motor and check the esc settings. I would have thought a 7xl on 4s would fly.

cutoff voltage set at 12 volts. Buggy was checked at the time of lock up and there are no rocks...any where .The motor is very rough to turn if you can turn it at all you can feel it grinding. Drivetrain is very free nothing in the way. It only ran two minutes is because the motor locked up.

Grinding motor? sounds like a busted bearing or magnet...

I agree on the Neu 2.5D, or, a 2D if you want alittle more pop. 1.5D is like overkill.

As for voltage cutoff, I have been advised by a variety of people and the distributor of the battery I am using that for best life and performance (Enerland cells being used), a cutoff of 3.2V - 3.3V per cell should be used. You may want to configure your cutoff accordingly.

thanks, when I get a new motor I will reconfigure my esc.

Just be aware you might get false LVC triggers depending on the battery being used. This depends on how fast a particular LVC responds to a dip in voltage. On takeoff, the battery voltage spikes down (because current spikes up) and may dip below 3.3v pretty easily. I usually set my LVC to 3.1v give or take - good balance between cell safety and reduced LVC sensitivity.