Blog
Technical guides, deep dives into ECU families and hands-on calibration notes, written by our engineers.
September 20, 2026 · 8 min read
Stage 1, Stage 2, Stage 3: what actually changes
What Stage 1, 2 and 3 actually mean, with gains measured across our own database: a median of +25% on Stage 1. And why the stage number does not predict the result.
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August 29, 2026 · 3 min read
The Shop4Tuner app is here, on iPhone and Android
Our mobile app is now on the App Store and Google Play: submit your files, estimate their Token cost, track your requests in real time and download your remapped files, wherever you are.
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July 16, 2026 · 3 min read
Our new file portal is live
Our file portal has been rebuilt at portal.shop4tuner.com: new interface, four languages, professional accounts with verified VAT number.
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July 6, 2026 · 4 min read
Why after-sales support matters more than the price of the file
The price of a file says nothing about what happens after delivery. Adjustments, engineer response, history: what sets a serious file service apart.
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June 12, 2026 · 12 min read
ECU tuning explained: the complete guide
How ECU remapping actually works: OBD, bench and boot reads, maps, checksums, slave and master tools, and custom files versus database files.
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