LABVIEW FPGA - log High speed encoder readings

Hi, 

I'm new to LabView FPGA. I have an encoder with 1000 ppr. I want to log each pulse from the encoder against a time stamp for 20 seconds at 4000 rpm. So that means I will have to log 66 666 pulses per second. I need to log all these pulses against a time stamp. 

I don't need to access data in real time. Since I need to acquire data only for 20 seconds, it is more than enough if I can access them after data acquisition. 

I am using a cRIO - 9024 with the high-speed digital card NI 9401. 

I need this to finish my MPhil thesis. And I'm in a bit of a hurry since my scholarship is only good for next 3 months. 

Thank you. I really appreciate if anyone can help me. I'm really screwed if I cannot get this right.