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Discussion Starter · #1 · (Edited)
NOTE: This isn't meant to sway people who want a max effort set with launch control and race at the drag strip for max times, etc. I don't care what "insert Facebook star in hero DA name here" ran with his Ecutek tune. It's well known that Ecutek has access to significantly more tables currently over HPT as well as launch control. I'm not interested in the critiquing of my results from A) those who don't tune, and B) those who haven't tuned a VR30 with HPT. This is for the DIY who wants to gain good power and responsiveness and control their own tune and enjoy playing and learning instead of paying crazy prices for locked tunes and having to pay extra for minor changes and things that cost the tuner nothing (like adding launch control).

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NOTE: This isn't meant to sway people who want a max effort set with launch control and race at the drag strip for max times, etc. I don't care what "insert Facebook star in hero DA name here" ran with his Ecutek tune. It's well known that Ecutek has access to significantly more tables currently over HPT as well as launch control. I'm not interested in the critiquing of my results from A) those who don't tune, and B) those who haven't tuned a VR30 with HPT. This is for the DIY who wants to gain good power and responsiveness and control their own tune and enjoy playing and learning instead of paying crazy prices for locked tunes and having to pay extra for minor changes and things that cost the tuner nothing (like adding launch control).


Think of HP Tuner's as the red pill.
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Now that the JB4 is sold, it's time to start the HP Tuner's tutorial/learning thread. Hopefully others will go this route and help me learn too! If you don't know about HP Tuners, they've been around a long time. They're big in the domestic/diesel world and added support for the VR30 motor. I owe a big thanks to @[email protected] for supporting, and continuing to support me, in resolving issues that are either self inflected by me, or issues with features that they continue to work on and improve as needed. As far as pricing, you can pick up a a new HP Tuners MPVI2 tuner for $300 brand new. This gives you the ability to flash your car as well as logging. They come up used on forums as well. To license your VIN requires purchasing 6 credits, which are $50 per credit. This means you are out the door for a total of $600 to be able to flash your own car, log, clear codes, etc. This is about half the cost of a standard Ecutek tune, possibly less depending on who/what you do.
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When you do a read or write on your car, I suggest removing the fan relay under the hood in the driver side fuse box as Infiniti in their infinite (get it? :) ) wisdom decided to run both fans during a read (which can take 10 minutes or more) or a flash (5 min) which can kill the battery. Here is a thread on the HPT forum for some of the basics (not all of which apply to the VR30):


When you open the VCM editor to view and modify a tune, you'll see something like this, where you can navigate through the tabs that cover all of the turbo/boost/airflow tables, fueling tables, spark tables, throttle, etc.
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In the airflow tab, you'll see various tables and sub-tabs to modify boost control.
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You'll want to focus on max map pressure/max map pressure 2, desired boost/desired boost link, Boost limit base1/2, boost correction high load and low load tables, and the proportional, integral, derivative boost feedback tables. Max map and max boost tables are what they sound like. You can specify when you want boost cut to kick in by RPM. Max map takes into account atmospheric pressure (~14.7 psi) which is why the values are higher. Stock values shown below:
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Here's what the boost curve looks like on a non-RS and how they use separate load tables to reach the lower boost level compared with an RS:
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Factory PID control tables for closed loop boost correction. Note that POSITIVE error is UNDER BOOST and negative error is OVER BOOST. I fought with this until my thinking was corrected. So from the factory, proportional boost adjustment is essentially uniform for over/under boost, but Integral and Derivative Gain is only handled for under boost, not over boost.

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Here are some additional tables that are the default wastegate position (which varies from 0mm (fully closed) to 8mm (fully open)), wastegate position during shifting (THIS IS A FACTORY TABLE IN A 21 MODEL YEAR THAT HPT IS ADDING TO PRE-21 YEARS!!! :) ), as well as the turbo compressor speed on a non-RS that is based on airflow vs. RPM. For all the JB4 haters, THIS is why having a non-RS doesn't mean you're going to blow your turbos if you turn up the boost. The table is based on airflow, not measured boost. So the car DOES know how fast the turbos are spinning for a given airflow.
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Discussion Starter · #2 · (Edited)
Spark tables-
Here you'll see the various spark tables, low detonation (high octane), high detonation (low octane) main spark tables, idle spark, modifiers, knock sensor tables, etc.
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Here is what the low detonation/high octane table looks like. For the JB4 people who were trying to understand whether they had knock or not mid gear when they saw a single 2-3 degree drop in the mid-RPM range, remember how Terry Burger and I theorized that it was a step change in the spark tables? Here you go. You'll see that if you jump in boost and RPM that you can easily see where you'll have drops of 2-3 degree's of timing. You have full control of this in the tune. There are several other tables, but really this is the table you'll play with if desired depending on boost level. Timing tables are the same for an RS you just hit higher load rows which lowers timing.
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Discussion Starter · #3 · (Edited)
AFR tables- You have full control of AFR for normal operation as well as when knock is being detected. You also have the ability to have an AFR multiplier based on load as well as change your stoich point for other fuels (E85), etc.
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Discussion Starter · #4 · (Edited)
Torque tables-
Estimated indicated torque is used for how much transmission pressure is used based on torque.. From the factory this table is the same for an non-RS and an RS.
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Load/Torque Conversion- This is KEY for quick shifts as well as quick throttle response. Small changes make huge improvements. No need for Pedal Commanders with these tables. Notice that at low throttle the car is commanding NEGATIVE torque!!!! This is why your pedal is mush when cruising around. This table is what turned by car into a burnout machine from a dig. This table is significantly lower for a non-RS, BUT at low throttle they both are very sluggish.
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Throttle Position Request- Linearity of the pedal. Notice at lower speeds the throttle is neutered even more and not as linear.
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Discussion Starter · #5 · (Edited)
Intake cam timing- For those asking about aftermarket cams, you have the ability to adjust your cam timing via the tune based on load vs. rpm. There are 9 "modes" but you can make them all the same for performance.
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Discussion Starter · #6 · (Edited)
My results-
After doing much searching, I discovered that Ecutek gives all of their tuners a starter tune that adds 100ftlbs/60hp over a RED SPORT. They tell you exactly what tables to modify so regardless of what someone says, they're not starting from scratch. They're taking what Ecutek themselves provided and then modifying tunes from there based on mods. Nothing against any tuners, just be real that Ecutek gives you a very good starting platform. Ecutek also provides a wonderful wiki page with how to understand various tables including intake cam timing.
Between the HPT thread, the Ecutek Wiki, and help from @[email protected] I've gotten to the point where I'm getting commanded boost, AFR, spark, throttle, etc. how I want it. The car is extremely responsive, to the point that I haven't been able to make a clean Dragy pass even after a big burnout, launching on clean concrete, on a drag radial. See below for a snip of a log. Each MAF was pulling about 28lb/min of airflow. That's roughly 550-560fwhp at 16.5 PSI. Subtract 20% drivetrain loss and I'm looking at 440-450whp range. It was good weather which helped! :) Usually I'm in the 26-27 lb/min range so low 400whp. As far as times, I've spun multiple times to a 4.3 0-60 and 8.0 @ 90 mph 1/8 mile time- NO LAUNCH MODE. Searching through the Dragy database, there are several cars out there tuned by AMS/Racebox/etc. running in this range as well likely because they didn't have launch mode either. They also had a better 60ft than I did. All of the cars I've seen running 7's or better are using launch mode and pull 1 G on launch. You can see in my Dragy the G's going up and down due to lack of traction and very slow G on launch because I couldn't leave on anything more than ZERO psi or I'd blow the tires off. This is currently a gap with HPT, but I imagine at some point it'll be added as a feature. At that point it still wont help me unless I get a bigger tire on the back. First world problems :) For $600, it's tough to beat!
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Discussion Starter · #7 · (Edited)
Logging.- The VCM Scanner allows you to log in real time, with varied sample rate, read/clear trouble codes, as well as turn some things on/off in real time for testing purposes. You get to set your desired parameters to log as well as build tables for logging that populate in real time for tuning and to see where you need to make adjustments for things like AFR/timing/boost etc. You can replay a pull a normal speed or zoom in on WOT pulls etc.
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Discussion Starter · #8 · (Edited)
Most of the pics/info I've posted are what the tables were stock. If someone gets HPT I'm happy to share what I changed or share my tune as a starter that can be used for comparison. Questions welcome!
 

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Infiniti in their infinite (get it? :) ) wisdom
🤦‍♂️

Awesome right up though sir! I look forward to seeing what people do with the Torque controls
and see if the shift performance can be messaged for some better response still.
 

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Spidey, very nice! Thank you for taking the time.

Q - is it possible to flash back to stock - with no trace - for warranty work?
 

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Once again, you have gone above and beyond! And once again, you’ve got me thinking about spending money I wasn’t planning on spending lol
 

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Discussion Starter · #13 ·
Spidey, very nice! Thank you for taking the time.

Q - is it possible to flash back to stock - with no trace - for warranty work?
First thing ANYONE should do after the long read of the factory tune is save it off as the "golden tune" so they can flash back to stock if need be. As far as any trace, just like with Ecutek unless you do something very risky in the flashing process, they will be able to see the flash rev incrementer if they go looking for it.
 

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Awesome contribution DDN! Like your WMI setup, I may be pulling this up sometime in the future and copying your work! Imitation is the ultimate compliment!! For now I am enjoying my (formerly your) JB4, WMI, Hikeit setup! Pulls and feels like a beast compared to just JB4 alone.

Thanks for all your research and help!
 
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Discussion Starter · #15 ·
No prob. I know that some would be hesitant to tune their own car but it's really not bad, especially if someone has done it before you and can provide some guidance. Just nice to have another option that is between a JB4 and paying someone for a locked full custom tune.
 

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Excellent write up, thanks for sharing your knowledge and giving the community additional tuning options.
 

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🤦‍♂️

Awesome right up though sir! I look forward to seeing what people do with the Torque controls
and see if the shift performance can be messaged for some better response still.
Are you sending a text to the TCU? Facetime?
 

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Discussion Starter · #18 ·
🤦‍♂️

Awesome right up though sir! I look forward to seeing what people do with the Torque controls
and see if the shift performance can be messaged for some better response still.
I should see if I can get a vid clip of the car shifting in manual mode at decent throttle now. It shifts hard and fast.
 

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🙌👏
i couldn't find the bow down smilie so clapping hands will have to do now. Definitely subscribed!

i've been around turbo car since early 2000's with the 1.8T from Audi and played around a bit with Letmewink and VagCom but this is definitely on a different level. I then stumbled onto Osiris/Cipher but then they had to "change" their approach that ultimately alienated customers. Bottom line is that i am very impress with your level of transparency and willingness to share.

Keep up the good work sire!
 

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Discussion Starter · #20 ·
🙌👏
i couldn't find the bow down smilie so clapping hands will have to do now. Definitely subscribed!

i've been around turbo car since early 2000's with the 1.8T from Audi and played around a bit with Letmewink and VagCom but this is definitely on a different level. I then stumbled onto Osiris/Cipher but then they had to "change" their approach that ultimately alienated customers. Bottom line is that i am very impress with your level of transparency and willingness to share.

Keep up the good work sire!
Thanks for the kind words. I remember VagCom too lol. Honestly, this is how the aftermarket for tuning on a given platform SHOULD be. The record setters lock their tuners and dont share info (which is fine as that's their job right?) and the other 99% are forthcoming about what and how they're tuning and helping each other sort out bugs/issues. Hopefully some folks like @Jdubbz and @Nukespeq50 try it out too. I know Jdubbz did a nice YT video on navigating through a stock tune. Hopefully if he gets back in the Q50 world my tune will be a short cut to get him up to speed on what did/didn't work for me and continues to work the tune so we get better!
 
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