NC Miata with 2.5L base tune

VersaTuner for Mazda MX-5 Miata
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MiataJon
Posts: 2
Joined: February 15th, 2026, 3:25 pm

NC Miata with 2.5L base tune

Post by MiataJon »

Hey Guys,

I recently bought a 2.5L 2006 NC Miata (otherwise bone stock) and went with Fab9's tune package with versatuner. I feel like the base tune file I got makes my car run slower and Bryan at Fab9 is impossible to get ahold of so I thought I'd tinker around with Versatuner.

My pretune AFR looked rich and now my Fab9 tune looks lean. It's basically running at around 14.7 all the time, even at WOT.

Anyone have a base 2.5L Miata tune I can use to start my tuning journey?

Jon
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Data log - 2026-02-07 09.25.41 After Tune.csv
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CrazyCanadian
Posts: 43
Joined: July 4th, 2021, 8:32 pm

Re: NC Miata with 2.5L base tune

Post by CrazyCanadian »

Can you post your tune.
MiataJon
Posts: 2
Joined: February 15th, 2026, 3:25 pm

Re: NC Miata with 2.5L base tune

Post by MiataJon »

I only have the Fab9 tune, so I can't edit it. Basically starting from scratch
CrazyCanadian
Posts: 43
Joined: July 4th, 2021, 8:32 pm

Re: NC Miata with 2.5L base tune

Post by CrazyCanadian »

If you are starting from scratch that means you have your stock tune from the ECU to work from. Can you post it.
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