https://www.hptuners.com.au/vehicles/#supported-vehicles

Up and go tuning, Devonport (2026)

09/09/2026

HOW TORQUE MODELLING AFFECTS 6L80 SHIFTS

On an LS-powered vehicle with a 6L80, the engine ECU and transmission controller aren’t operating independently.

One of the most important pieces of information shared between them is engine torque.

The 6L80’s shift strategy needs to know what torque the engine is producing so it can determine how much torque reduction is required during a gear change and how the transmission should control the shift.

This is where torque modelling becomes extremely important.

The ECU doesn’t have a torque sensor bolted to the crankshaft.

Instead, it estimates engine torque using its internal models and inputs such as calculated airflow, engine speed, load, throttle position and other calibration parameters.

That calculated torque becomes an important input into the overall control strategy.

WHAT HAPPENS DURING A SHIFT?

Take a 2–3 upshift.

The transmission needs to release the current holding element while applying the next one.

During this process, the ECU can reduce engine torque to make the shift easier for the transmission to complete.

This can involve ignition timing intervention and, depending on the strategy, electronic throttle intervention.

The objective isn’t simply to remove as much torque as possible.

The objective is to provide the correct amount of torque reduction for the shift event.

Too little reduction can result in excessive clutch-to-clutch stress or a harsh shift.

Too much reduction can make the shift feel lazy, create an RPM flare or cause the transmission to take longer to complete the shift.

WHERE TORQUE MODELLING CAUSES PROBLEMS

Now modify the LS.

You install a camshaft, headers, intake, cylinder heads, increased compression or forced induction.

The engine’s actual torque curve changes.

But if the ECU’s torque model still predicts something close to the original engine, the transmission control strategy can be working from incorrect information.

The ECU might believe the engine is producing less torque than it actually is.

Or it might believe it’s producing more.

Either situation can affect how torque reduction and transmission control are applied.

This is why simply changing shift pressure isn’t always the answer.

You need to understand what the ECU thinks the engine is doing first.

TORQUE MODEL → TRANSMISSION CONTROL

Think of the relationship as:

Airflow → Load → Calculated Torque → Torque Request/Reduction → Engine Output → Transmission Shift

Each part of that chain can influence the next.

If the calculated torque is wrong, the requested torque reduction can also be inappropriate.

This is particularly important with heavily modified LS combinations where the factory airflow and torque models no longer accurately represent the engine.

WHY “DISABLE TORQUE MANAGEMENT” ISN’T ALWAYS THE ANSWER

A common modification is to remove or heavily reduce torque management because the owner wants the car to feel stronger.

But torque management isn’t there simply to make the vehicle slower.

It is part of how the ECU and transmission coordinate engine torque during events such as gear changes.

Removing it can change the mechanical load placed on the transmission and alter the way the clutches apply.

You may get a harder-feeling shift, but harder doesn’t automatically mean better.

WHAT WE LOOK AT

When diagnosing a 6L80 shift issue, we want to look at the entire event.

RPM.

Input speed.

Output speed.

Gear commanded.

Gear actual.

Throttle position.

Engine torque.

Torque reduction.

Ignition timing.

Line pressure.

Shift timing.

Converter slip.

And the relevant transmission control parameters.

We’re looking for the sequence of events.

Did the ECU request torque reduction?

Did the engine actually respond?

Did the transmission begin the clutch transition?

Did RPM flare?

Did the next gear apply correctly?

That allows us to separate a calibration issue from a potential mechanical or hydraulic problem.

A 6L80 calibration isn’t just about adding pressure until the shift feels harder.

The engine torque model, torque reduction strategy, shift timing and hydraulic control all need to work together.

The transmission can only control the shift properly if the control system has an accurate understanding of the torque it’s dealing with.

That’s why torque modelling is such a critical part of calibrating a modified LS and 6L80 combination.

UP & GO TUNING
Custom LS ECU & Transmission Calibration
Road & Remote Tuning — Australia-Wide & Worldwide
LS | Holden | GM

09/09/2026

SYNCHRONISING RPM, MAP, MAF AND LAMBDA DATA

A data log isn’t just a collection of numbers.

The real value comes from understanding what those parameters are doing at the same point in time.

RPM, MAP, MAF and lambda all describe different parts of what the engine is doing.

When we synchronise them against time, we can start to see the relationship between engine speed, engine load, airflow and combustion.

RPM tells us how fast the engine is turning.

MAP tells us the absolute pressure in the intake manifold.

MAF tells us the measured mass airflow entering the engine on a MAF-based system.

Lambda tells us what the oxygen sensor is reporting about the combustion mixture.

Looking at those channels individually can be misleading.

For example, seeing a lambda value of 0.95 doesn’t tell us much by itself.

We need to know:

What was RPM?

What was MAP?

What was MAF airflow?

Was the throttle opening or closing?

Was the engine accelerating or decelerating?

Was the ECU in open loop or closed loop?

What was commanded lambda?

Once those channels are aligned in time, the picture becomes much clearer.

Imagine an engine accelerating through 3,000 RPM.

RPM is increasing.

MAP rises as engine load increases.

MAF airflow increases.

Lambda should respond according to the ECU’s commanded fueling strategy.

If lambda moves away from the commanded value at a particular MAF frequency or load area, we can investigate that specific region rather than making a broad fuel adjustment across the entire calibration.

The same principle applies to transient events.

Suppose the throttle closes and RPM starts falling.

We can look at MAP dropping, MAF airflow changing, lambda responding and RPM decaying.

If the engine then stalls, we can examine the sequence immediately before the stall.

Did airflow drop too quickly?

Did the ECU close the throttle?

Did idle spark correction react?

Did lambda move excessively rich or lean?

Did RPM fall faster than the idle control strategy could recover?

The sequence matters.

A parameter changing isn’t necessarily the cause of the problem.

It could be the result of something else happening milliseconds earlier.

This is why time alignment is so important.

We’re essentially trying to reconstruct what the engine and ECU were doing moment by moment.

On a MAF-based calibration, we can also examine the relationship between MAF frequency and measured airflow.

If the engine repeatedly shows a fueling error at a particular MAF frequency, RPM and load range, we have a much stronger indication that the airflow model may need attention.

On a Speed Density calibration, MAP, RPM, IAT and the VE model become particularly important because the ECU is estimating airflow rather than directly measuring it with a MAF.

The more accurately we can correlate these signals, the easier it becomes to distinguish between:

• Airflow modelling errors
• Fuel delivery problems
• Sensor errors
• Transient fuelling issues
• Incorrect commanded lambda
• Load calculation errors
• Mechanical problems

This is why a good data log isn’t about logging absolutely everything.

It’s about logging the right channels at the right resolution and understanding how they interact.

We’re not just asking:

“What’s the AFR?”

We’re asking:

“What was the engine doing when the AFR changed, what did the ECU command, and what happened immediately before and after it?”

That’s where data logging becomes a diagnostic tool rather than just a graph.

UP & GO TUNING
Custom ECU Calibration
Road & Remote Tuning — Australia-Wide & Worldwide
LS | Holden | GM
Engine & Transmission Calibration

09/09/2026

💉 PE ENRICHMENT — WHAT ACTUALLY HAPPENS WHEN YOU GO WOT?

One of the most misunderstood parts of an ECU calibration is Power Enrichment (PE).

You put your foot down, the throttle opens and the ECU suddenly changes the way it controls fuel.

But it isn’t simply:

“WOT = add fuel.”

There’s a lot more happening behind the scenes.

🧠 WHAT IS PE?

During normal driving, the ECU can operate in closed loop, using the oxygen sensors to correct fuelling around the commanded lambda.

Under high-load conditions, the ECU can transition into Power Enrichment.

The purpose is to provide the commanded mixture needed under high engine load and to move away from relying on normal closed-loop correction for the primary WOT fuel strategy.

⚙️ WHAT TRIGGERS IT?

Depending on the ECU strategy, PE can be influenced by things such as:

* Throttle position
* Engine RPM
* Calculated load
* MAP
* Pedal position
* Time delay
* Coolant temperature
* Other calibration conditions

This means two WOT events don’t necessarily enter PE in exactly the same way.

📊 THE TRANSITION MATTERS

Imagine you’re cruising at 2,500 RPM and you suddenly go WOT.

The ECU has to transition from the normal fuel-control strategy into the PE strategy.

That transition has to be calibrated correctly.

Too little enrichment can result in the engine running leaner than intended during the load increase.

Too much can make the mixture unnecessarily rich, potentially costing power and affecting combustion quality.

And the rate at which PE comes in matters too.

A delayed enrichment strategy can produce a completely different transient response compared with one that responds immediately.

🔥 COMMANDed VS ACTUAL LAMBDA

This is where proper logging becomes extremely useful.

We can compare:

Commanded Lambda → Actual Lambda

during the entire WOT event.

If commanded lambda is 0.85 but the engine actually goes to 0.92 during the transition, the calibration isn’t delivering what was requested.

That doesn’t automatically mean the PE table is wrong either.

Fuel pressure, injector characterisation, MAF/VE modelling, exhaust leaks, sensor response and fuel-system capacity can all influence the result.

🏁 AND HERE’S THE IMPORTANT PART

PE isn’t something you should simply make “richer for safety.”

The correct target depends on the engine combination, fuel, load, combustion chamber, ignition timing, intake charge temperature and the purpose of the calibration.

The goal is to get the actual delivered mixture to follow the intended calibration.

That’s why at Up & Go Tuning, we don’t just change the PE numbers and call it done.

We command it, log it, compare it and verify it.

Because WOT isn’t a fuel table — it’s an entire control strategy. 🔧💻

09/09/2026

🔧 DRIVER DEMAND VS TORQUE MANAGEMENT — WHO ACTUALLY CONTROLS THE THROTTLE?

One of the biggest misconceptions in modern ECU tuning is that your accelerator pedal directly controls the throttle blade.

It doesn’t.

In a torque-based ECU, the pedal is essentially a torque request.

You press the pedal → the ECU interprets driver demand → calculates the requested torque → checks torque limits and modifiers → then determines how much airflow, throttle angle, spark and sometimes fuel are required to achieve that torque.

So you can have the pedal at 100% while the throttle blade is nowhere near 100%.

🧠 DRIVER DEMAND

Driver Demand tables essentially answer:

“How much torque does the driver want at this pedal position and RPM?”

For example, 80% pedal doesn’t necessarily mean 80% throttle.

The ECU may request a specific torque value based on:

* Pedal position
* RPM
* Gear
* Vehicle speed
* Engine load
* Torque limits
* Transmission state
* Temperature
* Other torque modifiers

⚙️ TORQUE MANAGEMENT

This is where things get interesting.

The ECU has multiple torque limits and torque reduction strategies.

During a gearshift, for example, the transmission controller can request engine torque reduction.

The ECU can achieve that reduction through several methods, depending on the calibration strategy:

Throttle closure → spark re**rd → fuel intervention

The exact priority and strategy varies between ECU platforms.

So if you’ve increased engine power but haven’t addressed the torque model and torque management correctly, the ECU can still decide:

“That’s more torque than I’m allowing.”

And start closing the throttle or pulling torque.

📊 THIS IS WHY LOGGING MATTERS

You can see:

Pedal Position: 100%
Driver Demand: High
Requested Torque: High
Throttle Position: 65%

The driver is asking for everything — but the ECU is deliberately limiting airflow.

That’s not necessarily a mechanical problem.

It can be the calibration doing exactly what it was programmed to do.

This is also why simply changing a throttle table or disabling torque management isn’t necessarily a proper solution.

You need to understand why the ECU is requesting torque reduction in the first place.

At Up & Go Tuning, we’re not just looking at whether the throttle opens.

We’re looking at the torque model, driver demand, calculated torque, requested torque, limits and intervention to understand what the ECU is actually trying to achieve.

The pedal is the request.
The ECU makes the decision. 🔧💻

09/09/2026

📊 WHAT DATA LOGGING CAN TELL YOU THAT A DYNO NUMBER CAN’T

A dyno sheet gives you a horsepower and torque number.

Useful? Absolutely.

But a number alone doesn’t tell you why the engine made that power — or what the ECU was doing while it got there.

This is where proper data logging becomes critical.

A good log can show us:

🔹 RPM vs commanded torque
🔹 Engine load / calculated load
🔹 MAF frequency and airflow
🔹 MAP pressure
🔹 Commanded vs actual lambda/AFR
🔹 STFT and LTFT fuel trims
🔹 Injector pulse width and duty cycle
🔹 Injector flow calculations
🔹 Spark advance
🔹 Knock re**rd by cylinder/bank where available
🔹 ECT and IAT
🔹 Throttle angle — commanded vs actual
🔹 VVT commanded vs actual position
🔹 Camshaft position and VVT response
🔹 Fuel pressure where the ECU supports the PID
🔹 Torque management intervention
🔹 Transmission input/output speeds
🔹 Shift timing and slip
🔹 Converter slip and lock-up behaviour
🔹 Commanded vs actual gear

And this is where it gets really interesting.

An engine might make 300 kW on the dyno, but the log can tell us whether it actually achieved the commanded lambda, whether fuel trims were correcting, whether the MAF was being accurately modelled, whether timing was being pulled by knock control, whether the throttle was closing, and whether the VVT system actually followed the commanded cam position.

We can also look at transient behaviour.

What happens when you go from 2,500 RPM to wide open throttle?

Does the throttle open immediately?

Does airflow respond correctly?

Does commanded lambda transition properly?

Does injector pulse width jump as expected?

Does ignition timing drop during the torque increase?

Is the ECU intervening with torque management?

These things might never be obvious from a final dyno number.

📈 A dyno tells you WHAT happened.

📊 Data logging helps tell you WHY it happened.

And when you combine the two properly, you get a much clearer picture of what the engine and ECU are actually doing.

That’s why we don’t just chase a number at Up & Go Tuning.

We look at the data, identify what the ECU is doing, make the calibration changes and then log it again to verify the result.

The data doesn’t lie. 🔧💻

09/09/2026

🔧 WHY YOUR HEADERS CAN CHANGE THE TUNE

Think headers are just about making your exhaust louder and looking good?

Think again.

Changing from factory exhaust manifolds to a set of headers can significantly change how your engine moves air.

Better exhaust flow can change:
• Airflow through the engine
• Volumetric efficiency
• MAF readings
• Fuel requirements
• Load calculations
• Torque output
• Where the engine makes power

That means the tune that worked perfectly with your factory manifolds may not be the right calibration once headers are fitted.

This is especially important on LS engines, where exhaust changes can make a noticeable difference to the way the engine behaves.

Mods change airflow — airflow changes what the ECU needs.

That’s why at Up & Go Tuning, we tune the combination you actually have, rather than throwing a generic file at it.

09/09/2026

💰 $1,200 FOR A TUNE — IS IT TOO MUCH?

We see it all the time.

Someone hears the price of a proper custom tune and straight away thinks, “That’s too much.”

But what are you actually paying for?

You’re not just paying for someone to plug in a laptop and change a few numbers.

You’re paying for the time spent understanding your setup, analysing data logs, making changes, checking the results and refining the calibration until the car is running properly.

At Up & Go Tuning, we don’t believe in poor-man copy-and-paste tunes.

A poor-man tune is often done quickly, with minimal checking and little attention to the individual setup. It might look cheap upfront, but it can cost more in poor performance, drivability issues and potential engine problems.

Every car is different. Every setup is different. And the calibration needs to match it.

So is $1,200 too much?

That depends on what you expect from your tune.

Cheap tune? Plenty of options.

Proper custom calibration? That’s where the value is. 🔧💻

08/09/2026

🔧 LOCAL TUNE TODAY — VE SSV

Today we’re tuning a local VE SSV and getting it dialled in properly. 👌

No copy-and-paste maps. No guessing. Just proper calibration based on the car, its setup and the data we see.

We’ll be working through the tune, checking the logs and making the adjustments needed to get it running exactly how it should. 💻🔧

Up & Go Tuning
Custom ECU Calibration
Road & Remote Tuning Australia-Wide 🇦🇺

08/09/2026

🔥 ROBERT’S VE HDT — REMOTE TUNING DONE RIGHT 🔥

Robert came to Up & Go Tuning with gearbox issues that had been giving him plenty of headaches.

He’d already dealt with bigger companies, explained what was happening and felt like he simply wasn’t being listened to.

So we listened.

This was all done remotely, working with Robert through the car’s data and calibration to properly address the issues rather than just throwing a tune at it and hoping for the best.

We didn’t tell him:

“We’ll try.”

We told him:

“We’ll get it done.”

And we did. 👊

The end result:

💥 303kW AT THE WHEELS
💥 406HP AT THE WHEELS
💥 520Nm AT THE WHEELS

But the numbers aren’t even the best part.

Robert’s feedback says it all — smiles all round! 😎

That’s what we’re chasing at Up & Go Tuning.

Not just numbers on a dyno graph — fixing the problems, listening to the customer and making the car work the way it should.

You don’t always need to put the car on a dyno to get results.

You need the right data, the right calibration and someone who actually knows what they’re looking at.

Big thanks to Robert for trusting us with his HDT. 🤝

He had a problem.
We listened.
We said we’d get it done.
And we did.

UP & GO TUNING
On Road & Remote Tuning Specialists
Built to Perform. Tuned to Thrill.

08/09/2026

🏁 RACE DAY — ALEX’S VY SS 🏁

Back to the track tonight with Alex’s VY SS, and we’re ready to see what this thing can really put down. 🔥

Since the last outing, we’ve taken around 60kg out of the car and stepped up the rear with the Mickey Thompson ET Street R drag radials.

The current combo:

🔧 3.9 diff gears
🔧 Ramjet OTR — MAFless
🔧 LS6 intake manifold
🔧 Extractors & full exhaust
🔧 3500 stall converter
🔧 Shift kit
🔧 Corvette servo
🔧 Up & Go Tuning ECU & transmission calibration
🔧 60kg weight reduction
🏁 Mickey Thompson ET Street R drag radials

Last time out, the VY was a blink of an eye away from the 12s.

With the weight out, the new tyre setup and everything dialled in, tonight we’re back for another crack.

The goal is simple — break into the 12s. 🏁🔥

Let’s see what the VY can put down tonight.

Up and go tuning

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