3.3L ignition timing question

[Confettimaker]

Is pushing 47.5 timing advance normal while cruising on Map 2 and 93 octane?

I have the BMS 450WHP kit and a cat-back. (And densos)

Update: IGN 1 was consistently 45 on my drive home, IGN 2-5 remained at exactly 0 the entire time.

 

[CraigS]

I'm not an expert but I'll give you my 2 cents. Ignition timing will be advanced quite a bit at cruise to maximize fuel economy. 47 sounds about right. Your ign2-6 is not showing advance, but reduction of timing in the other cylinders relative to cylinder 1. So zero on those means that they are also at 47 degrees. Any timing retardation would be in response to knock. ign2-6 will typically be zero at cruise and idle and should stay under 3.5 or so at wide open throttle.

 

[DonD]

I have the BMS 450WHP kit and a cat-back. (And densos)

Sounds like that will shove you very hard into the seat. Don

 

[oddball]

Yup, normal. Modern cars with individual coils can do extreme timing swings and they use it to modulate power and efficiency. Power requirements at light cruise are very low, so it can run very lean, but a lean mixture needs lots of advance to burn. You'll see timing in the low single digits when under power.
As an old-school distributor tuning guy, this was pretty wild to watch for the first time. Although, by comparison, my old v8 runs almost 50 degrees of timing at light cruise.