Debian 8.8 rt more jitter than wheezy

The system seems very stable, however I get 9000 to 1000 ^s on wheezy.
Any other thoughts

is Wheezy using the same Preempt-RT kernel?

Linux home 4.9.0-0.bpo.3-rt-amd64 #1 SMP PREEMPT RT Debian 4.9.25-1~bpo8+1 (2017-05-19) x86_64 GNU/Linux
this kernel for debian 8.8

Sorry No
Linux debian 3.4-9-rtai-686-pae #1 SMP PREEMPT Debian 3.4.55-4linuxcnc i686 GNU/Linux
this one on Debian 7x
Will try optimize , proceses, cores, gnome, hardware drivers, etc

Yes, your Wheezy and Jessie systems are running totally different real time kernel types
Its expected that a RTAI kernel will have lower jitter numbers than a Preempt-RT kernel

Note that worrying about jitter of these magnitudes is only important if you are running a
parallel port system.

Yip I agree

Thinking of 7i80hd with 7i40's to turn a lathe with 1/3 hp older micro 100 dc brushed servos.
Recomended by Todd was a 7i37 to handle misc cooling, tool changer stepper etc.
Am still a little concerned about ethernet reliability, should I be?

Zack