Total Timing Advance Question
Posted: Sun Feb 19, 2023 1:19 am
I'm looking at the timing tables for a 2010 Acura TL SH-AWD 6MT. I'm trying to understand the total timing advance that is in place.
Both Factory Base Configuration and Tune 3 (addition of PCDs or HFPCs) show the following on the main layout page:
0 psi (1013 mbar) load @4900 rpm.
19.2 Ignition timing
+ -1.2 knock limit
- 7.6 knock retard
--------------------------
11.6 ignition timing advance
Did I calculate that correctly? The documentation I read says to add the knock limit but the tables @4900RPM show -1.2 so I assume I subtract that out.
I'm assuming the 1013 mbar (0 psi) would be WOT.
So at 4900rpm at WOT the car would have 11.6 degrees of timing advance. Is that correct?
Is the knock retard only invoked if knock is encountered? I'm trying to understand if the actual timing could be closer to the 19.2 ignition timing setting or if the knock limit and knock retard are always in place adjusting the actual ignition timing advance.
Thanks in advance for the help!
Both Factory Base Configuration and Tune 3 (addition of PCDs or HFPCs) show the following on the main layout page:
0 psi (1013 mbar) load @4900 rpm.
19.2 Ignition timing
+ -1.2 knock limit
- 7.6 knock retard
--------------------------
11.6 ignition timing advance
Did I calculate that correctly? The documentation I read says to add the knock limit but the tables @4900RPM show -1.2 so I assume I subtract that out.
I'm assuming the 1013 mbar (0 psi) would be WOT.
So at 4900rpm at WOT the car would have 11.6 degrees of timing advance. Is that correct?
Is the knock retard only invoked if knock is encountered? I'm trying to understand if the actual timing could be closer to the 19.2 ignition timing setting or if the knock limit and knock retard are always in place adjusting the actual ignition timing advance.
Thanks in advance for the help!