knock retard and injectors question...

[cathan]

My GN has stock (old) injectors and I see generally high O2 readings at WOT on scanmaster (800-875) even with fuel pressure around 38-40. With 93 octane I get 1-3, sometimes 4 degrees of retard at 13 lbs of boost on shifts.
I hear retard can also be from running too rich, and I am being careful to take it easy and not turn it up too high until I get some new injectors (exhaust is stinky!). Also plan to install RJC airflow plate...

Any thoughts on this are appreciated...Thanks

 

[Sleeper]

The octane rating of the chip you are using will play a big part in how much knock you will see. More fuel does not always compensate for low octane and too much timing. It usually just make the car slower to spool.

You may also be getting false knock on the shifts. DP banging against something, weak motor mounts.

List all you mods done to your car, and it will make it easier for us to point you in the right direction.

Paul