ECU ; stock ECU Vs Nismo ECU difference

Originally Posted by Megan370z

This is something an aggressive bolt-on/custom and loud setup might want to look at. The stock Knock sensor are very sensitive and can be trigged by outside noise than an actual Ping/Knock

Knock Thresholds




There is 3 different Map for every MAP (5 total using the cruise bottom)
Cold / Main / High Det.



VHR Timing Correction
This is the setting that every Tuner/Pro Cable should have got since the beginning.
From the Uprev Email Update, There is 2 map call VHR Timing Correction and they act similar to the Fuel compensation
10pts is about 1 actual degree from what I can remember on that email
and Negative Number can be added (very nice feature for the FI peoples, according to Uprev.)



EDIT ; This is a copy paste of the email sent on 16 Nov 2013

Hello all,

As many of you have noticed, there are some new tables being added to the latest VHR ROMs labeled "VHR Timing Target". The label is going to be changed to "VHR Timing Correction" in the next release since that better describes what these tables represent. These new tables work very much like the "Fuel Correction" tables except they change the ignition, meaning that increasing the values will increase timing and decreasing the values will decrease the timing (you CAN run negative values in these tables to reduce the timing for forced induction). We found that these new tables have a greater effect on the actual timing run compared to the older "burn time" tables that we've been using since before VVEL came along. Using these new tables we were able to get the advance on our test 370Z up to 32 DBTDC and make an additional 8WHP. Using the old tables we could not get the ignition above 28 DBTDC. Although these tables are more effective they are at the same time LESS sensitive. It takes about 10 points in the table to get a 1 degree change in timing advance. We will be working on adding these new tables to real time tuning over the next several months, but for now they are being made available as static tables.
You may also notice that the VHR ROMs have a "knock threshold" table, and new knock logging parameters. The knock threshold table represents the knock sensor sensitivity by RPM. Decreasing the values will make the knock sensor more sensitive and vise versa. The knock strength parameter works much like it does on the older ECUs.

We've also launched a "ROM dump" web page that we'll now be using to capture ROM dumps and vehicle information. We'll no longer be accepting ROM dumps via the ROMs@UpRev.com email. If you email a ROM dump to us we'll just refer you to the new page. This new method should reduce ROM patch turnaround time and make it easier for everyone. You can find it at this link:

ROM Dump Form

- Jared