Nissan 370Z Forum - View Single Post

semtex · 04-26-2010, 05:26 PM

You can input timing adjustments, but they don't go anywhere. The ECU just overrides the inputs with its own timing parameters. AFR is the only thing that takes. My understanding from Sharif (who has spoken about this directly with Uprev) is that our ECUs automatically add as much timing as is safely possible straight from the factory, so there's little to be gained via timing adjustments anyway. Not sure if I believe it 100%. But what do I know? I'm no expert when it comes to ECU tuning.

Edit: A clarification re. timing. What I've been told is that there's a max threshold to the timing. Try to dial in timing past that threshold and the ECU will just ignore your inputs. However, if your ECU is for whatever reason running timing well below that threshold and you use Uprev to advance it up to the threshold, those inputs will take. They will take because they're still within the factory max threshold. That's why we've seen such inconsistency with some folks (like me and RCZ) getting hardly any gain (I only got +6whp and RCZ got even less if I remember correctly), while others make a lot more. The results vary depending on each vehicle's starting point in terms of where the timing is.

04-26-2010, 05:26 PM	#76 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 53 Posts: 5,995 Drives: People to drink Rep Power: 32	You can input timing adjustments, but they don't go anywhere. The ECU just overrides the inputs with its own timing parameters. AFR is the only thing that takes. My understanding from Sharif (who has spoken about this directly with Uprev) is that our ECUs automatically add as much timing as is safely possible straight from the factory, so there's little to be gained via timing adjustments anyway. Not sure if I believe it 100%. But what do I know? I'm no expert when it comes to ECU tuning. Edit: A clarification re. timing. What I've been told is that there's a max threshold to the timing. Try to dial in timing past that threshold and the ECU will just ignore your inputs. However, if your ECU is for whatever reason running timing well below that threshold and you use Uprev to advance it up to the threshold, those inputs will take. They will take because they're still within the factory max threshold. That's why we've seen such inconsistency with some folks (like me and RCZ) getting hardly any gain (I only got +6whp and RCZ got even less if I remember correctly), while others make a lot more. The results vary depending on each vehicle's starting point in terms of where the timing is. __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf. Last edited by semtex; 04-26-2010 at 05:54 PM.