Turbos and injectors.
A turbo upgrade or new injectors are the next step once a tune runs out of airflow or fuel, matched together and set up on the dyno.
When a tune on its own won't do it.
We'll tell you when a tune on its own will do the job and when it won't.
When a tune runs out.
A remap can only do so much with the factory turbo and injectors. Past a point, the turbo can't supply more air without working too hard, and the injectors can't deliver more fuel.
That's when an upgrade makes sense: a turbo that flows more air, injectors that deliver more fuel, and a tune that ties them together.
Signs of tired injectors.
Injectors wear with the kilometres, so they're worth having checked every so often. The giveaways are more smoke than usual, a louder diesel rattle and fuel economy that isn't what it was.
Fresh Denso injectors bring the engine back to spec before it's tuned, so the tune is built on parts that are working properly.
A turbo upgrade, matched.
A bigger turbo with factory injectors, or bigger injectors with the factory turbo, leaves the engine out of balance. We match the turbo, injectors and tune to each other and to how you use the vehicle, then check it all on the dyno.
The Just Autos JA-300 turbo upgrade is for the 70 Series V8. For other diesels, tell us what you've got and what's been done, and we'll tell you what's possible.
What we fit.
Just Autos JA-300 turbo
The Just Autos JA-300 turbo upgrade for the 70 Series V8. See the Just Autos page.
Injector upgrades
Upgraded injectors such as +30s, and fresh Denso injectors to bring a tired engine back to spec before it's tuned.
Turbos and injectors questions.
Why tune on a dyno?
The tune is built and checked under load on our 4WD roller dyno or 2WD hub dyno, so you get a before and after power sheet instead of taking our word for it.
When do I need a bigger turbo?
When a tune has taken the factory turbo as far as it can go and you want more, usually for heavy towing or a bigger build. We'll tell you first if a tune on its own will do the job.
How do I know if my injectors are worn?
More smoke than usual, a louder diesel rattle and fuel economy that's dropped off are the usual signs. They're worth having checked every so often, so tell us what you're noticing and we'll take a look.
Should I replace injectors before a tune?
If they're worn, yes. A tune built on tired injectors won't run the way it should. Fresh Denso injectors bring the engine back to spec first.
Will a turbo upgrade affect reliability?
Problems usually come from mismatched parts or a tune that pushes too far. We match the turbo, injectors and tune to each other and check it all on the dyno.
How do I get a price?
Send us a quote request with your vehicle, rego and what you're after, or call Shane on 0407 287 264. We don't list prices on the website because every vehicle and set-up is different. We'll reply within 1–3 business days.