Llandow Tuning

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Llandow Tuning Dyno and Motorsport Custom Tuning @ Llandow Wales

Tuning, Remapping and Motorsport Electronic Specialists since 2004.

From a 1930s Carbs to a Modern EFI we have the skills and equipment to help tune your car in-house.

18/10/2026

BMW X5 - Real Dyno Tuning
No Off the Shelf. Custom Engine and Gearbox tuning at Llandow Tuning

Had a "dyno proven" or "live map" aka a ยฃ25 downloaded file... Drop us a line and get it on the dyno!

๐—•๐— ๐—ช ๐—ซ๐Ÿฑ ๐Ÿฏ๐Ÿฌ๐—ฑ ๐—™๐Ÿญ๐Ÿฑ - ๐—”๐—ก๐—ข๐—ง๐—›๐—˜๐—ฅ ๐Ÿณ๐Ÿฌ ๐—›๐—ฃ? ๐—ฌ๐—˜๐—ฆ, ๐—ฃ๐—Ÿ๐—˜๐—”๐—ฆ๐—˜. ๐Ÿ”ฅThis BMW X5 came in for the full treatment, with custom engine AND gearbox...
17/10/2026

๐—•๐— ๐—ช ๐—ซ๐Ÿฑ ๐Ÿฏ๐Ÿฌ๐—ฑ ๐—™๐Ÿญ๐Ÿฑ - ๐—”๐—ก๐—ข๐—ง๐—›๐—˜๐—ฅ ๐Ÿณ๐Ÿฌ ๐—›๐—ฃ? ๐—ฌ๐—˜๐—ฆ, ๐—ฃ๐—Ÿ๐—˜๐—”๐—ฆ๐—˜. ๐Ÿ”ฅ
This BMW X5 came in for the full treatment, with custom engine AND gearbox tuning developed here in-house.
๐—ฃ๐—ผ๐˜„๐—ฒ๐—ฟ: ๐Ÿฎ๐Ÿฑ๐Ÿฐ ๐—›๐—ฃ โžก๏ธ ๐Ÿฏ๐Ÿฎ๐Ÿฐ ๐—›๐—ฃ
๐—ง๐—ต๐—ฎ๐˜โ€™๐˜€ ๐—ฎ ๐Ÿณ๐Ÿฌ ๐—›๐—ฃ ๐—ด๐—ฎ๐—ถ๐—ป. ๐Ÿ’ช

The engine calibration was custom developed, tested and refined on our dyno, with the ZF8 gearbox calibration also tweaked in-house to complement the engine tuning.
We also resolved the AdBlue issues and start/stop errors while it was with us.

๐—”๐—ป๐—ฑ ๐˜๐—ต๐—ฒ ๐—ฐ๐˜‚๐˜€๐˜๐—ผ๐—บ๐—ฒ๐—ฟ? ๐—ฅ๐—ถ๐—ด๐—ต๐˜ ๐˜๐—ต๐—ฒ๐—ฟ๐—ฒ ๐˜„๐—ฎ๐˜๐—ฐ๐—ต๐—ถ๐—ป๐—ด ๐˜๐—ต๐—ฒ ๐—ฑ๐˜†๐—ป๐—ผ ๐˜๐—ฒ๐˜€๐˜๐—ถ๐—ป๐—ด.
They could see the process and the results for themselves a finished figure of 324 HP, demonstrated in front of them.

Got a BMW X5 30d? Drop us a message to discuss engine and gearbox tuning for yours.

โ€œ๐—œ๐˜โ€™๐˜€ ๐—ท๐˜‚๐˜€๐˜ ๐˜๐—ต๐—ฒ ๐—ฎ๐—ฐ๐˜๐˜‚๐—ฎ๐˜๐—ผ๐—ฟ, ๐—บ๐—ฎ๐˜๐—ฒ.โ€Funny how โ€œjust the actuatorโ€ came with a different turbo, an unknown remap, a reported M...
17/10/2026

โ€œ๐—œ๐˜โ€™๐˜€ ๐—ท๐˜‚๐˜€๐˜ ๐˜๐—ต๐—ฒ ๐—ฎ๐—ฐ๐˜๐˜‚๐—ฎ๐˜๐—ผ๐—ฟ, ๐—บ๐—ฎ๐˜๐—ฒ.โ€

Funny how โ€œjust the actuatorโ€ came with a different turbo, an unknown remap, a reported MultiAir failure and an engine that might be forged but there is no paperwork!

But yes. Just the actuator.

And now weโ€™ve received negative feedback because we wouldnโ€™t take the job on. Weโ€™ve never tuned or repaired this car, but apparently weโ€™ve still managed to get it wrong.

Letโ€™s rewind.

An Alfa Romeo MiTo owner contacted us in 2025. Heโ€™d bought the car already tuned, had no paperwork confirming the work and wanted a rolling-road power run to find out what it was making.

We exchanged messages, spent time explaining everything and discussed him coming down.

He never came in.

Fast-forward to this year. A different turbo had been fitted, the car was showing an actuator-related fault, and he wanted the turbo โ€œcalibratedโ€.

He told us heโ€™d already contacted several other tuners and garages without getting the work taken on.

Weโ€™ve worked on plenty of modified MiTos and Abarths, including different turbo setups, so we said to pop down for a free consultation.

Thatโ€™s when the job started growing legs.

First, it was the turbo.

Then we were told the MultiAir unit had failed and needed replacing. Could we do that as well? He was struggling to find somebody to take it on.

Then came other possible problems.

Then came the suggestion that the engine might have forged internals. No paperwork to confirm it.

๐—” ๐—ณ๐—ฎ๐—ถ๐—ฟ๐—น๐˜† ๐˜‚๐˜€๐—ฒ๐—ณ๐˜‚๐—น ๐—ฑ๐—ฒ๐˜๐—ฎ๐—ถ๐—น ๐˜๐—ผ ๐—บ๐—ฒ๐—ป๐˜๐—ถ๐—ผ๐—ป ๐˜„๐—ต๐—ฒ๐—ป ๐˜†๐—ผ๐˜‚โ€™๐—ฟ๐—ฒ ๐—ฎ๐˜€๐—ธ๐—ถ๐—ป๐—ด ๐˜€๐—ผ๐—บ๐—ฒ๐—ฏ๐—ผ๐—ฑ๐˜† ๐˜๐—ผ ๐˜๐˜‚๐—ป๐—ฒ ๐˜๐—ต๐—ฒ ๐—ฒ๐—ป๐—ด๐—ถ๐—ป๐—ฒ, ๐˜†๐—ผ๐˜‚โ€™๐—ฑ ๐˜๐—ต๐—ถ๐—ป๐—ธ.

Every extra detail changed what we were being asked to assess. Yet the explanation kept coming back to:

โ€œItโ€™s just the actuator.โ€

Well, weโ€™d need to establish that. Along with whatโ€™s actually fitted, what condition itโ€™s in, what mechanical work it needs and whatโ€™s been done to the existing calibration.

Calling it a quick adjustment doesnโ€™t make the rest of that disappear.

It was also his only car, and he needed it sorted urgently. We understand that. But โ€œI need it yesterdayโ€ doesnโ€™t create space in the workshop diary.

We had no availability for the mechanical work being described. We explained that those repairs might need doing elsewhere before we could consider the tuning.

We didnโ€™t take the job on.

Now weโ€™ve got the negative feedback.

Hereโ€™s the thing:

๐—œ๐—ณ ๐˜†๐—ผ๐˜‚ ๐˜„๐—ฎ๐—ป๐˜ ๐˜‚๐˜€ ๐˜๐—ผ ๐˜๐—ฎ๐—ธ๐—ฒ ๐—ฟ๐—ฒ๐˜€๐—ฝ๐—ผ๐—ป๐˜€๐—ถ๐—ฏ๐—ถ๐—น๐—ถ๐˜๐˜† ๐—ณ๐—ผ๐—ฟ ๐˜๐—ต๐—ฒ ๐—ฟ๐—ฒ๐˜€๐˜‚๐—น๐˜, ๐˜„๐—ฒ ๐—ป๐—ฒ๐—ฒ๐—ฑ ๐˜๐—ผ ๐—ฏ๐—ฒ ๐—ฎ๐—ฏ๐—น๐—ฒ ๐˜๐—ผ ๐—ฎ๐˜€๐˜€๐—ฒ๐˜€๐˜€ ๐˜๐—ต๐—ฒ ๐˜„๐—ต๐—ผ๐—น๐—ฒ ๐—ท๐—ผ๐—ฏ.

We canโ€™t sensibly agree to โ€œjust adjustโ€ something because thatโ€™s what the owner has decided it needs.

We need a clear specification, proper diagnosis, an agreed scope and enough time to do the work properly. Especially when the list of unknowns keeps getting longer.

A free consultation is time spent understanding the job. It doesnโ€™t automatically reserve workshop space for everything that comes out during the conversation.

Weโ€™re happy to discuss complicated cars and custom turbo setups. We also have to recognise when a job is beyond the time we can give it.

Because we can already imagine how this one could end:

โ€œ๐—ฆ๐—ถ๐—ป๐—ฐ๐—ฒ ๐˜†๐—ผ๐˜‚ ๐—ฟ๐—ฒ๐—บ๐—ฎ๐—ฝ๐—ฝ๐—ฒ๐—ฑ ๐—บ๐˜† ๐—ฐ๐—ฎ๐—ฟโ€ฆโ€

And that is precisely the conversation we wanted to avoid with problems that were already being reported before weโ€™d touched it.

Sometimes a garage saying no is exercising a bit of judgement.

Apparently, that needs explaining too.

๐—ช๐—ต๐—ฎ๐˜โ€™๐˜€ ๐˜๐—ต๐—ฒ ๐—ฏ๐—ถ๐—ด๐—ด๐—ฒ๐˜€๐˜ โ€œ๐—ถ๐˜โ€™๐˜€ ๐—ท๐˜‚๐˜€๐˜โ€ฆโ€ ๐—ท๐—ผ๐—ฏ ๐˜†๐—ผ๐˜‚โ€™๐˜ƒ๐—ฒ ๐—ฒ๐˜ƒ๐—ฒ๐—ฟ ๐—ฐ๐—ผ๐—บ๐—ฒ ๐—ฎ๐—ฐ๐—ฟ๐—ผ๐˜€๐˜€?

Whilst I didn't want to be rude, after receiving a message telling us we needed to remap his car or we'd get negative feedback clearly we didn't reply quick enough and he somehow thinks that he is going to get assistance from us now. lol
As I pointed out to him, I thought he was a moron and he proved the point.
I have to be honest with myself, after his completely childish review and his blackmail like message I enjoyed telling him he was a moron and the reason nobody wanted to help him was down to his own attitude. I pity anyone that does help him

Swansea University Racing were in with us this week, testing their engine and drivetrain on the rolling road. We found s...
16/10/2026

Swansea University Racing were in with us this week, testing their engine and drivetrain on the rolling road. We found several areas for improvement, including a problem with downshifting.

With the car running on the dyno, we could command gear changes, monitor the live data and watch the actuator attempt to move but fail. Initially it was suspected the issue related to a setting within the ECU. However data logging and moving it manually allowed us to pinpoint the problem to the actuator itself, rather than the gearbox.

This is where the rolling road really earns its keep. We could reproduce the fault and investigate it right in front of us. Doing the same testing on a track would mean rigging up external controls, with much less opportunity to watch what was happening.

Nothing better than seeing a customer enjoying the vehicle post tuning"Had my Citroen picasso GTI done there last week. ...
07/10/2026

Nothing better than seeing a customer enjoying the vehicle post tuning

"Had my Citroen picasso GTI done there last week. Great knowledge and a great job. Was on the rolling road on Wednesday, drove to Germany on Friday, on the track Sunday and drove back to Barry on Monday. Over all 1560 miles the car did not miss a beat.
THANK YOU ALL. SEE YOU WITH THE NEXT ONE"

07/10/2026

๐—ง๐—›๐—œ๐—ฆ ๐—œ๐—ฆ ๐—ช๐—›๐—ฌ ๐—ช๐—˜ ๐—ง๐—˜๐—ฆ๐—ง ๐—ข๐—จ๐—ฅ ๐—ง๐—จ๐—ก๐—œ๐—ก๐—š.

Imagine paying for a remap that promises big gains, only to receive a file that hasnโ€™t been tested on your car. Rescaling the accelerator pedal can make it feel more powerful without actually increasing its maximum power. Worse still, a badly written calibration can put the engine at risk.

You donโ€™t even need a rolling road to measure the results. A properly set up road dyno, using a sensor attached to a wheel, can calculate power from the carโ€™s weight, speed and acceleration, with road resistance and test conditions taken into account.

So if a mobile tuner isnโ€™t measuring the results, what are their power claims based on? And if a tuning centre owns a rolling road, why arenโ€™t they using it to check your car?

Todayโ€™s BMW 335d xDrive is a good example. I thought my first calibration would give a good result, but testing showed just 320 HP, up from 300 HP standard. That told us there was more work to do. We reworked the calibration and tested again, finishing at 380 HP and just under 700 Nm.

๐—ฆ๐˜๐—ฎ๐—ป๐—ฑ๐—ฎ๐—ฟ๐—ฑ: ๐Ÿฏ๐Ÿฌ๐Ÿฌ ๐—›๐—ฃ
๐—™๐—ถ๐—ฟ๐˜€๐˜ ๐—ฐ๐—ฎ๐—น๐—ถ๐—ฏ๐—ฟ๐—ฎ๐˜๐—ถ๐—ผ๐—ป: ๐Ÿฏ๐Ÿฎ๐Ÿฌ ๐—›๐—ฃ
๐—™๐—ถ๐—ป๐—ฎ๐—น ๐—ฟ๐—ฒ๐˜€๐˜‚๐—น๐˜: ๐Ÿฏ๐Ÿด๐Ÿฌ ๐—›๐—ฃ / ๐—ท๐˜‚๐˜€๐˜ ๐˜‚๐—ป๐—ฑ๐—ฒ๐—ฟ ๐Ÿณ๐Ÿฌ๐Ÿฌ ๐—ก๐—บ

The ZF 8HP gearbox also received a custom calibration for faster shifts, with increased clutch pressure to help the clutch packs hold the extra torque and reduce the risk of slipping.

Anyone can quote a power figure. Testing shows what the car actually delivers, and checking how the engine behaves under load matters just as much as the headline number.

๐—ช๐—ต๐—ฎ๐˜โ€™๐˜€ ๐˜๐—ต๐—ฒ ๐—ฝ๐—ผ๐—ถ๐—ป๐˜ ๐—ผ๐—ณ ๐—ฎ โ€œ๐—ฐ๐˜‚๐˜€๐˜๐—ผ๐—บโ€ ๐—ฐ๐—ฎ๐—น๐—ถ๐—ฏ๐—ฟ๐—ฎ๐˜๐—ถ๐—ผ๐—ป ๐—ถ๐—ณ ๐—ถ๐˜ ๐—ถ๐˜€๐—ปโ€™๐˜ ๐˜๐—ฒ๐˜€๐˜๐—ฒ๐—ฑ ๐—ผ๐—ป ๐˜†๐—ผ๐˜‚๐—ฟ ๐—ฐ๐—ฎ๐—ฟ?

06/10/2026

BMW 435d xDrive in for a health check and correction.

This vehicle arrived with a custom map which we proceeed to dynot est it. After inspecting the map, it was frankly impossible to tell what the previous "tuner" was trying to achieve. While the throttle pedal felt aggressive, the rest of the software was completely unoptimised.

We completely wiped the slate clean and started afresh.
With a proper, safe calibration, we dialed the vehicle in at a strong 369hp exactly where a quality Stage 1 map should be on this engine. We also paired it with a custom gearbox tune to deliver faster, crisper shifts while protecting the transmission.

If youโ€™ve paid for a "custom" or "live" remap from a mobile tuner or the car never went on the dyno or at least a road dyno and want to know what your car is actually making (and how safe the map really is), get in touch.

Drop us a message by visiting: www.tuning.wales

No Deposits to book
22 Years Experience

01/10/2026

VW Polo 1.4T โ€“ True Custom Dyno Tuning ๐Ÿ› ๏ธ๐Ÿ

A lot of places promise a "custom remap," but how custom can it really be if it was developed on someone else's car?

This VW Polo 1.4T visited us at Llandow Tuning for the real deal. We don't deal in generic, off-the-shelf maps with fancy labels. Every calibration we write is developed in-house, tailored specifically to your vehicle, and rigorously tested on our dyno to ensure optimal power delivery and safety.

โ€ข Stock: 140 HP
โ€ข Llandow Tuning Custom Stage 1: 180 HP

The result? A massive transformation in throttle response, a much wider power band, and a healthy +40hp gain without sacrificing reliability.

If you want a map that is actually built for your car, get in touch with the team today!

Lucky escape for this owner. We had to remove the ECU to do some tuning, only to find substantial corrosion which would ...
30/09/2026

Lucky escape for this owner. We had to remove the ECU to do some tuning, only to find substantial corrosion which would have soon resulted in a dead water damaged ECU.

30/09/2026

๐Ÿš— ๐—ช๐—›๐—˜๐—ก ๐—” โ€œ๐——๐—ฃ๐—™ ๐——๐—˜๐—Ÿ๐—˜๐—ง๐—˜โ€ ๐—š๐—ข๐—˜๐—ฆ ๐—ช๐—ฅ๐—ข๐—ก๐—šโ€ฆ

This Ford Fiesta came to us for a Stage 1 tune. The customer also asked us to remove the DPF software, telling us the DPF itself would be physically removed elsewhere.

Shortly afterwards the car came back in limp mode, then later returned badly blocked and barely running.

We put a camera into the exhaust and told the customer the DPF still appeared to be completely intact.

At that point the job could have stopped and the customer would only have had the basic diagnostic charge.

But we were told:

โ€œ๐—ก๐—ผ, ๐˜๐—ต๐—ฒ ๐——๐—ฃ๐—™ ๐—ต๐—ฎ๐˜€ ๐—ฏ๐—ฒ๐—ฒ๐—ป ๐—ฟ๐—ฒ๐—บ๐—ผ๐˜ƒ๐—ฒ๐—ฑ.โ€

We don't have a crystal ball.

If the DPF had genuinely been removed, then what exactly were we looking at inside it?

The only way to find out was to remove the unit and open it up.

And there it was.

๐—ง๐—ต๐—ฒ ๐——๐—ฃ๐—™ ๐˜„๐—ฎ๐˜€ ๐˜€๐˜๐—ถ๐—น๐—น ๐—ณ๐˜‚๐—น๐—น๐˜† ๐—ถ๐—ป๐˜๐—ฎ๐—ฐ๐˜ ๐—ฎ๐—ป๐—ฑ ๐—ฐ๐—ผ๐—บ๐—ฝ๐—น๐—ฒ๐˜๐—ฒ๐—น๐˜† ๐—ฏ๐—น๐—ผ๐—ฐ๐—ธ๐—ฒ๐—ฑ.

What had been removed instead?

๐Ÿคฆ ๐—ง๐—›๐—˜ ๐—–๐—”๐—ง.

We also found the O2 sensor had been damaged and had a heater short-circuit fault, something we often see when a sensor has been caught with a drill or tool during this sort of exhaust work.

The customer is now unhappy about being charged for the time spent finding all of this.

But the bottom line is simple.

๐—œ๐˜'๐˜€ ๐˜†๐—ผ๐˜‚๐—ฟ ๐—ฐ๐—ฎ๐—ฟ. ๐—œ๐˜'๐˜€ ๐˜†๐—ผ๐˜‚๐—ฟ ๐——๐—ฃ๐—™. ๐—ช๐—ฒ ๐—ฑ๐—ถ๐—ฑ ๐˜๐—ต๐—ฒ ๐˜„๐—ผ๐—ฟ๐—ธ ๐˜„๐—ฒ ๐˜„๐—ฒ๐—ฟ๐—ฒ ๐—ฎ๐˜€๐—ธ๐—ฒ๐—ฑ ๐˜๐—ผ ๐—ฑ๐—ผ ๐—ฎ๐—ป๐—ฑ ๐—ฏ๐—ถ๐—น๐—น๐—ฒ๐—ฑ ๐—ณ๐—ผ๐—ฟ ๐—ถ๐˜.

If you choose to have work carried out elsewhere and that work isn't actually done correctly, the complaint needs to go back to the person who did it.

You can't then bring the car back to another workshop, ask them to diagnose and fix the problem, and expect them to work for free.

Our charging policy is very clear:

www.tuning.wales/faq

๐—ช๐—ฒ ๐—ฏ๐—ถ๐—น๐—น ๐—ณ๐—ผ๐—ฟ ๐˜๐—ต๐—ฒ ๐—ต๐—ผ๐˜‚๐—ฟ๐˜€ ๐˜„๐—ฒ ๐˜„๐—ผ๐—ฟ๐—ธ.

If you're looking for flat-rate diagnostics, there are plenty of workshops that work that way.

We don't.

Address

11 Sambuccus Avenue, Llandow Trade Est
Cowbridge
CF717PB

Opening Hours

Monday 10am - 6pm
Tuesday 10am - 6pm
Wednesday 10am - 6pm
Thursday 10am - 5pm
Friday 10am - 6pm
Saturday 10am - 3pm

Telephone

+441446355001

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