Timing adjustment and FI.

esfourteen · 10-05-2011, 09:36 PM

Quote:

Originally Posted by Red__Zed

you can adjust the timing but the ecu will do it's own adjusting based on sensors and conditions, including retarding timing back. you don't have 100% control like you do in the DE/HR maps, but this setup is safer as a result.

NYBladeZ · 10-06-2011, 09:15 AM

Quote:

Originally Posted by esfourteen

you can adjust the timing but the ecu will do it's own adjusting based on sensors and conditions, including retarding timing back. you don't have 100% control like you do in the DE/HR maps, but this setup is safer as a result.

Thank you for clarifying my statement, ha see I wasn't completely off.

wstar · 10-06-2011, 09:26 AM

A paragraph from UpRev's tuning guide for Nissans:

Quote:

On the newer vehicles equipped with VVEL, the ignition advance algorithms rely heavily on knock sensor feedback. In
many cases it is not possible to make the ECU run more advance because as soon as you increase the values it hears
something on the knock sensor and adjusts accordingly. For VVEL vehicles you WILL still have to pull timing for forced
induction applications so that it won’t ping before it has a chance to do any learning. However for NA applications about
all you can do is pull back the high spots and smooth the table out. The ECU will do the rest on it’s own. In our testing
we found that pulling LARGE values from the main ignition table caused a LARGE power drop on the first run, but after a
few consecutive runs the ECU would advance the ignition right back to where it was before based on knock sensor
feedback.

In some ways our cars are self-tuning within reasonable limits.

Braxx · 07-05-2020, 10:38 AM

What do you think about this data? With 45ºC in air intake.

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07-05-2020, 10:38 AM	#4 (permalink)
Braxx Base Member Join Date: Dec 2019 Location: Spain Posts: 2 Drives: Nissan 370Z Pack Rep Power: 7	What do you think about this data? With 45ºC in air intake.