Will it void my warranty?

Under Australian Consumer Law, a manufacturer cannot void your warranty simply because of a remap, they must prove the modification caused a specific issue. A remap can always be returned to stock if required.

Is it safe for my engine?

Yes. Every remap is performed on our dyno with live monitoring of boost, torque, air-fuel ratios and engine load. We don't guess — we measure.

Yes. ECU remapping is legal in all Australian states and territories.

What vehicles can you tune?

We tune the majority of late-model common-rail turbo-diesels — including Toyota Hilux, Ford Ranger, Isuzu D-Max, Mitsubishi Triton, Nissan Navara, Toyota Prado, Toyota Land Cruiser, and more. Contact us if you're unsure about your vehicle.

How long does it take?

Most remaps are completed in a single day. We'll confirm timing when you book.

Dyno Tuning in Grafton | OSP Automotive & Marine

Manufacturers tune engines conservatively — for global emissions compliance and market segmentation, not for Australian conditions or how you actually use your vehicle.

The result? Sluggish throttle response, more fuel stops than necessary, and a diesel that feels like it's always half-asleep.

A custom ECU remap by OSP recalibrates your engine's control unit to unlock the power, torque and efficiency your diesel was actually built for.

With diesel sitting above $2.40/L, a 10–15% fuel saving on a high-km ute or 4WD can recover the cost of the tune within 12–24 months.

For tradies and farmers doing serious kilometres, the maths is simple.

Every OSP diesel ECU remap includes:

Pre-dyno health check

Mechanical inspection, diagnostic scan and test drive before we touch anything

Baseline dyno run

We log your vehicle's current power, torque, air-fuel ratio and manifold pressure so you can see exactly where you started

Custom ECU remap

Multiple revisions on our in-house dyno until your vehicle is dialled in for your exact setup and usage

On-road driveability test

We drive it before you do

Full results pack

Diagnostic scan results, inspection images, before and after dyno sheets, and a tax invoice

All tuning is performed in-house using master-level tools on our 2WD Mainline dyno. Fully customised to your vehicle, your requirements and how you use it.

Not a generic base file. Not an off-the-shelf plug-in chip. A real tune, done properly, on a real dyno — by the workshop that already knows your vehicle.

35+ years combined experience — we've been servicing vehicles in the Clarence Valley for over 14 years. We know these engines.
Full-service workshop — your remap, your logbook service, your roadworthy, all in one place. No need to split your vehicle between workshops.
Local to Grafton — South Grafton. No travelling to find a specialist. We're here.
Licensed and insured — your vehicle is in safe hands.
Automotive AND marine — the only workshop in the Clarence Valley region that looks after your 4WD and your boat.

Will it void my warranty?
Under Australian Consumer Law, a manufacturer cannot void your warranty simply because of a remap, they must prove the modification caused a specific issue. A remap can always be returned to stock if required.
Is it safe for my engine?
Yes. Every remap is performed on our dyno with live monitoring of boost, torque, air-fuel ratios and engine load. We don't guess — we measure.
Is it legal in NSW?
Yes. ECU remapping is legal in all Australian states and territories.
What vehicles can you tune?
We tune the majority of late-model common-rail turbo-diesels — including Toyota Hilux, Ford Ranger, Isuzu D-Max, Mitsubishi Triton, Nissan Navara, Toyota Prado, Toyota Land Cruiser, and more. Contact us if you're unsure about your vehicle.
How long does it take?
Most remaps are completed in a single day. We'll confirm timing when you book.