OrangeVirus Tuning Tackles the Nissan 370z With EcuTek ProECU using Custom Maps
We have been working diligently for the last few months testing and applying our own "artwork" in data to the Nissan 370Z VQ37 ECM. Using EcuTeks ProECU, we can create our own tables inside the vehicles ECU, rerouting stock tables, creating our own tables, and manipulating racerom (Ecuteks' Signature feature tables) to make the VQ37 shine.
So What have we been working on? We have been working on a few things, some still under some development. But we are ready to release the details to our OVTune "OE" style RaceRom tune.
Here is where custom maps really make the difference between your standard tune, and our "lifetime" calibration. Why do we call it our lifetime calibration? Because we build it to last the lifetime of your car.
First, we went out and bought a brand new 2016 Nissan 370z to start our own development work. Brand new car, untouched, unmodded. We hit the dyno to build our cam tables, ignition and fueling tables. Once we were happy with our baseline settings, we hit the theoretical chalk board. What can we do to really emphasize our tuning? What can we do to make our tune that much different, that much better?
Anyone can throw a car on a dyno and churn out results for what they see. The real difference in a calibration vs a tune is applying things for what you DO NOT see. Even OEM calibration developers do this. Several (literally hundreds) of maps in your standard daily driving cars ECU are setup for any scenario. Even ones that may never be implemented. Your Airflow sensor fail? We got a backup for that. Your Coolant temp sensor stop responding? We got a backup for that!. This all is packaged into one calibration mean for the "lifetime" of the vehicle. So we do what we have always done. Build our calibrations with the intention to survive as long as your car does.
With that OEM mindset, we built a calibration that is so refined we couldn't wait to shed light on its details.
So what really goes into our VQ37 Calibration? to put it simply "A Lot." Ecuteks ProECU gives us up to 16 custom maps to play with, to spread our art across the digital canvas.
Our first thought was, the stock Nissan Calibration is really lacking when it comes to modifying the power and safety curve for temperature variations. We all know our cars "feel better" when it's cold outside. Feel "more powerful" when it gets that cold air. Isn't that why cold air intakes sell so well?
The stock Nissan Calibration really...to put it blankly..sucks in this section. So what did we do? We made our own! Thanks to EcuTeks amazing custom maps, we can take any sensor output readings, modify it, or reference it and create a table to modify the power curve ourselves. Below you can see just what type of OrangeVirus Artwork gets added to the 370z Digital canvas (ECU). We're not going to show you everything, but we will say in some calibrations, we use all 16 custom maps available. Whew!
The stock Nissan calibration simply asks for way too much fuel when you want power. After we get that out of the way with EcuTeks Custom writ Fuel maps, we thought, how can we refine this even more? Well here's how:
A custom fuel compensation referenced at higher loads that lean or enrich our base fueling factor depending on air temperatures. Cold Air = more power? What about Cold Air + Compensated fuel for colder air? Even more power! What if our base fuel factor is too lean for really hot air temps? No problem, we scaled it to properly adjust for air temps up to 165+*.. that's hot!
When intake temps rise, so does cylinder temps. Sometimes adding some extra fuel alone does not help. As engine calibrators, we understand this. We have seen the lengths that stock ECU calibration developer go to, to keep the engine safe as temperatures rise. So what's the problem with Nissan? They didn't add anything! Referencing tables from hundreds of stock ECU tables in various vehicles, we added our own Intake temperature based correction to our base ignition tables to ensure as temps rise, your engine is protected. Here is an ignition compensation for a 93 octane tune.
We start with an aggressive ignition map, which needs no additional advance as temperatures drop, but needs ignition retard as temperatures rise. So we created our own compensation table to reduce ignition, coordinating with intake temperatures and engine RPM. So that's double the protection!
What's one thing we know about the Z when the phrase "Miles Per Gallon" comes up? The VQ37 is a gas hog! If you're buying this car and expect even decent MPG, you are in for a rude awakening. There is no denying that the Z gets terrible MPG. But there is hope! Using EcuTeks PRoECU for the Z, which rewrites ignition tables completely (Thank god!) and our own custom correction maps, were were able to see nearly 31 MPG highway on 100 mile round trips, 70MPH in 7th gear. (tested on the 7AT).
We have developed an ignition correction table that tailors to MPG in low load, and a reference AFR table that is matched with EcuTeks 4 Way Map switching, which the ECU will snap to under certain conditions. What conditions? The one condition that really kills MPG on the stock Z calibration. Fuel request vs Load. Lets Imagine you're on the highway and you need to give your car a little more of the gas pedal to switch lanes, go around a car, or any reason. You're not flooring it, but you're technically not "cruising" anymore either.
Well engine load increases without any delay, and under stock conditions, fueling enriches, fuel gets wasted, your MPG flies out the window. This is how the stock tune is designed. Here's what our calibration development experience tells us...it's NOT necessary! Momentary throttle changes do not always need fuel dumps.
You don't have to leave stoich for a little passing power! So how did we fix that? We created a high load reference table that is used if you're cruising and snap to high load only momentarily.
This table is set on a timer, so that if you continue to stay in high load, it shuts off. More MPG? Check. Switches back to power enrichment when you need it? Check!
This is just a small glimpse of what goes into our calibrations for the Nissan VQ37. (370z Q50, etc)
We'd love to show you everything we do, but in all honestly this blog post would be several pages long.