Yeah go for it and share the results.
An ecomod tune shouldn't overheat the cat if you are doing pulse-and-glide type driving. All modern EFI systems inject more fuel so that the fuel burns in the cat and the whole exhaust system runs hotter in modern cars.
Just think.. what can go wrong...?
and start thinking up an excuse early to tell her.
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2003 Renault Scenic - 30% more power with no loss in fuel economy.
1991 Toyota GT4 - more economical before ST215W engine-swap.
previous: Water-Injected Mitsubishi ~33% improved.
future - probably a Prius
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