Let's talk Ignition!

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11-25-2018
VoidTuning

2 Attachment(s)

Let's talk Ignition!

Hey All,

Digging into a bolt on 370z, headers, intakes, downpipes.

Wanted to get some clarification on the timing tables we see. Is there a way to view which "MBT Mode" is currently being used? Does it matter? Coming from ecoboosts where the timing strategy is complicated, but we have an easy way to identify which is being utilized. Does the car use the LOW det ignition tables at WOT until KR is heard and then shift to hi det?

Attachment 85047

Also,
RPM????? axis on open loop target lambda? what's the deal?

Attachment 85048

Lastly, we have tables for VVEL duration at WOT, but nothing to change the VTC angle. Will this be supported? If not, can VTC angle be manipulated by changing VVEL duration?
11-26-2018
Fast4.7

I am assuming you are talking about the intake cam phasing angle vs the VVEL angle. VVEL angle is what adjust the VVEL duration. Never have seen it expressed as duration. I know that the cam phasing is handled automatically in response to the VVEL angle. If you were to alter the VVEL and Cam Phasing separately you could easily introduce valves and pistons.
11-26-2018
VoidTuning

Quote:

Originally Posted by Fast4.7

I am assuming you are talking about the intake cam phasing angle vs the VVEL angle. VVEL angle is what adjust the VVEL duration. Never have seen it expressed as duration. I know that the cam phasing is handled automatically in response to the VVEL angle. If you were to alter the VVEL and Cam Phasing separately you could easily introduce valves and pistons.

In the VVEL WOT table, it is expressed in duration rather than cam angle *. I don't have my laptop currently or I'd provide a screenshot. So then, does increasing duration in this table advance or retard the intake cam is the question?
11-26-2018
Fast4.7

Quote:

Originally Posted by VoidTuning

In the VVEL WOT table, it is expressed in duration rather than cam angle *. I don't have my laptop currently or I'd provide a screenshot. So then, does increasing duration in this table advance or retard the intake cam is the question?

Fairly certain that the intake camshaft is retarded as the VVEL duration is increased in the 370Z like it was in my M56S. Retarding a camshaft increases intake valve to piston clearance.
11-26-2018
VoidTuning

Quote:

Originally Posted by Fast4.7

Fairly certain that the intake camshaft is retarded as the VVEL duration is increased in the 370Z like it was in my M56S. Retarding a camshaft increases intake valve to piston clearance.

Perfect! Exactly what I needed to know about the VVEL. Thank you!
11-27-2018
evan.s@hptuners

Quote:

Originally Posted by VoidTuning

Hey All,

Digging into a bolt on 370z, headers, intakes, downpipes.

Wanted to get some clarification on the timing tables we see. Is there a way to view which "MBT Mode" is currently being used? Does it matter? Coming from ecoboosts where the timing strategy is complicated, but we have an easy way to identify which is being utilized. Does the car use the LOW det ignition tables at WOT until KR is heard and then shift to hi det?

Attachment 85047

Also,
RPM????? axis on open loop target lambda? what's the deal?

Attachment 85048

Lastly, we have tables for VVEL duration at WOT, but nothing to change the VTC angle. Will this be supported? If not, can VTC angle be manipulated by changing VVEL duration?

Looks like we've got a broken RPM axis, sorry about that. What's your OS ID, I'll go in and fix it