Stage 1 Remap: What It Is, What It Costs and Is It Worth It?

A Stage 1 remap is the most popular upgrade we do at Reidy Remaps. It changes the software in your car’s engine control unit (ECU) to unlock power and torque that the manufacturer left on the table, without changing any parts. This page explains what a Stage 1 remap does, what it costs, how safe it is and what to expect, from the people who write the files and prove them on a rolling road.

What is a Stage 1 remap?

Manufacturers set engines up conservatively so one map suits every country, fuel quality and driver. A Stage 1 remap adjusts that software for a standard car with no hardware changes. It typically alters settings such as boost pressure, fuelling, ignition or injection timing, and torque limits, all within the safe limits of the standard engine, clutch and gearbox.

It is called Stage 1 because it is the first step. Stage 2 and beyond need supporting hardware, which is covered further down.

What does a Stage 1 remap do?

• More power and torque, with the biggest difference usually felt in mid-range pulling power
• Better response, with less waiting for the car to pick up when you put your foot down
• Easier overtaking and towing, because the car pulls harder in each gear
• Possible fuel savings on some cars, especially diesels, if the extra torque means you use less throttle. This depends on the car and how you drive. See does ECU remapping improve fuel economy?

How much power does a Stage 1 remap add?

It depends heavily on the engine. As a rough guide, turbocharged diesels usually see the largest gains, turbo petrols also respond well, and non-turbo petrol engines gain much less because they cannot use extra boost.

We would rather prove the figures than quote them. Two-wheel-drive cars can go on our 800bhp dyno for a power run before and after the remap, so you leave with graphs showing exactly what your car gained. See rolling road and dyno tuning, or check our vehicle gains page.

How much does a Stage 1 remap cost?

At Reidy Remaps, Stage 1 remaps start from £275. The price depends mainly on the age of the car and the type of ECU:

• Diesels and turbo petrols up to 2008/9: from £275
• Diesels and turbo petrols from 2009/10 to present: from £300
• Denso and Japanese ECUs, including Mazda 3 and 6: £350
• Dyno remaps, tuned on our rolling road with before and after power graphs: from £325

Every remap we do is custom-written for your car, not an off-the-shelf file, at no extra cost. We offer discounts on multiple vehicles and will match most remap prices around the UK on a like-for-like basis. Full details are on our pricing page.

Is a Stage 1 remap safe?

A well-written Stage 1 remap keeps the engine within the limits of its standard parts. The risk comes from cheap generic files, over-ambitious figures, or remapping a car that already has a fault. That is why we:

• run diagnostics before any work, so existing faults are found and explained first
• write our own files rather than buying them in
• run diagnostics again afterwards and, in most cases, datalog the car on a road test

If you are not happy with the remap, you do not pay, and we can return the car to standard. Read more in is ECU remapping safe for engines? and can remapping damage a clutch?

Stage 1 vs Stage 2 remap

Stage 1 is for a standard car. Stage 2 builds on it after supporting hardware has been fitted, such as an uprated intercooler, intake or exhaust, so the engine can safely make more power. Beyond that, bigger turbos, injectors and fuelling upgrades call for a fully custom map, which is where the rolling road becomes essential.

We map Stage 2 and heavily modified cars too, including turbo conversions and standalone ECUs. See custom remapping or call us to talk through your build.

Stage 1 remap vs tuning box

A tuning box clips onto a sensor and tricks the ECU into adding fuel. A remap changes the ECU’s own software, so every setting can be adjusted together. Read our comparison: Stage 1 vs tuning box.

Stage 1 remap FAQs

How long does a Stage 1 remap take?

Most remaps are done the same day. We will give you a time when you book.

Do I have to tell my insurer?

Yes. A remap is a modification, so you should declare it. Not doing so can invalidate your cover. Read can remapping affect insurance premiums?

Will a Stage 1 remap pass an MOT?

A remap on its own does not cause an MOT failure, provided the car still passes the emissions test and has no warning lights. Removing emissions equipment such as a DPF is a different matter. See legal alternatives to DPF removal.

Can a Stage 1 remap be reversed?

Yes. We can return your car to its standard map.

Will it affect my warranty?

It can. If your car is under a manufacturer warranty, check with your dealer before remapping.

Can you do it at my house?

Yes. We offer mobile remapping at your home or work across Somerset, Dorset and Wiltshire, or you can come to our workshop near Wincanton for a dyno session.

Book your Stage 1 remap

Call 07709 453 760 or use the form below. Tell us your make, model, engine and year and we will confirm the price for your car.

Reidy Remaps, Unit 3, High Winds Farm Business Park, Higher Holton, Wincanton BA9 8AP