COVID19 UPDATE - We are keeping a close eye on the current situation and in line with latest government guidance we will remain operational until further guidance clarifies otherwise. If you have any questions, concerns or wish to postpone please do give us a call on 03336000669. We do still have our self-tuning options available: for those vehicles which are supported.


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Dyno Developed Software & Unrivalled
Technical Support.


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An ECU Remap for your exotic car
can significantly improve your driving


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ECU Remapping your Turbo Diesel has
never been so easy. With improved power
and fuel economy one simple step away.


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Tuning your truck can improve your pulling
power and fuel economy. See how Celtic
Tuning can help you and your fleet.


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Towing power is essential for any
farmer. Improve the power and
fuel economy of your tractor with
an ECU Remap.


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Testimonial Skoda Reviews

Skoda Fabia 1.9 TDI VRS 130 bhp

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Posted on 4th January 2018, 10:01

Dear all,

Just wanted to make the time to say a big thanks for sorting out my VRS yesterday.

Finding out that someone had already re-mapped it wasn’t that much of a surprise but I was worried about the software that had been uploaded.

The drive back to Bath was much more “enjoyable” for 2 reasons:

1) I had the peace of mind knowing that your software was now in the system.

2) The ‘smoothness’ on the uptake of the turbo just made it so much more fun.

So, once again.....many thanks.


United Kingdom

Not an actual picture of the tuned car

Great service and Great Product

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Skoda Roomster 1.9 TDI PD 105 bhp Diesel

Posted on 14th September 2017, 19:24

Not an actual picture of the tuned car

Great value product that really unlocked the potential of the engine, Alot more power through all the gears and about 3-4 more mpg.

Cameron, the technician, was professional and friendly. And I liked that the van was so clean.

Definitely recommend.


Englefield green, Surrey, United Kingdom

Skoda Superb 2.0 TDI CR 138 bhp

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Posted on 23rd March 2017, 11:35

Having previously had my Octavia VRS re-mapped, I waited all of a week to have my Superb 4X4 done! Arriving at a slightly unfamiliar location made me realise that Celtic had moved location, now in a comfortable, well appointed building their service had unbelievably got better! Sitting in comfort while my car was dealt with, watching on a large screen monitor what they were doing was good.

When the moment came to test drive the car after they had performed their 'magic' it was a revelation - smooth delivery of power from low down - pulling hard right up the rev range. I knew I was going to get this on my way down - yet it still comes as a surprise when you drive it.

Three months on and I can report long term improvements, aside from the increase in BHP to nearly 200 from the previous 138, fuel consumption (all important to a tight-wad like me!) has improved beyond my wildest hopes. I had seen about 8% overall increase with the Octavia VRS, but with the Superb 4X4 - I am now seeing 57MPG+ on my regular run to south Wales! Which equates to an improvement of about 14% - STUNNING!!

I can only say a big 'Thank-you' to all the crew, and having the power curve printout from the 'works' makes it worth the trip down! If you are thinking about doing this to your car, get it booked in!!

Paul Fineran

Director, Recording Systems

Cheddar, Somerset, United Kingdom

Skoda EGR Problems

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Skoda Octavia 1.6 TDI CR 103 bhp Diesel

Posted on 30th October 2016, 20:32

Not an actual picture of the tuned car

What can I say, top team, knew what the problem was, got on and sorted in no time. Didn't fob you off with something you didn't need or wanted.

Highly recommended company.

Francis Stanley

United Kingdom

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