At FC Tuning, we’re no strangers to the legendary Toyota Celica GT4 – a machine built to dominate rally stages but equally capable of delivering serious thrills on the road when mapped correctly. We’ve had the pleasure of working on numerous clients in the past, including this nice customer’s GT4 road car at Motorworx, with the goal of extracting reliable, usable performance without sacrificing drivability.

The Setup

This GT4 came in already boasting a healthy base of performance modifications. With a well-looked-after engine and supporting upgrades in place, the focus was on getting the most out of the setup while ensuring smooth delivery across the rev range.

On the Dyno

Once strapped down at Motorworx, we set to work calibrating the Apexi PowerFC ECU to balance power, torque, and safety. The Celica’s turbocharged 3S-GTE engine responded brilliantly to careful mapping. With optimised fuel and ignition adjustments, along with boost control refinement, the car produced over 350 horsepower with a strong torque curve that transforms the way it drives on the road.

The Result

The end result is exactly what the owner was looking for – a GT4 that feels alive yet predictable, pulling hard through the gears with minimal lag and excellent mid-range punch. It’s the kind of tune that makes the car not only faster but also far more enjoyable in everyday conditions.

At FC Tuning, we don’t just chase numbers – we tailor every calibration to the car’s intended use, whether that’s road, track, or competition. This Celica GT4 is now ready to deliver reliable performance on UK roads with all the character you’d expect from a rally-bred icon.

The post TUNING THE TOYOTA 3S-GTE (GT4) first appeared on FC TUNING.

Big Shout out to Izzy, who discovered us via the MR2 Forums, and as a result she took a scenic drive from Wales down to FC Tuning in England with a pretty cool mission: to spruce up her Toyota MR2 Rev 3. Now, this isn’t just any car; it’s powered by the legendary 3S-GTE engine, and we were all about giving it the TLC it deserved.

So, what was on the agenda? We started with installing Izzy’s already purchased classic Apexi PowerFC unit and wiping it back to its factory OEM settings. After a couple hours of set up, Izzy noticed a smoother ride and an overall improvement over the original settings. A new set of gapped spark plugs and a little tweak here and there were all it took to get rid of those annoying misfires at high speeds.

Given the car’s age – yep, it’s a 30-year-old gem – we decided to go easy on it. We gave the turbo a mild boost, enough to spice up the mid-range driving experience without pushing it too hard. It’s all about keeping things balanced, ensuring we can have more fun drives without any worries.

Looking to the future, I’ve got some ideas for Izzy’s MR2. Imagine it with a solid Twin plate clutch, ID1000 injectors, a beefy 450-liter per hour in tank fuel pump with a FPR at 3.5bar, and why not throw in a GTX30 Gen III turbo for good measure on a wrapped log manifold an either a FMIC or Charge Cooler? With these upgrades, we’re talking about serious torque and rear wheel power – enough to have a propa good blast on those Welsh mountain roads and leave everyone in the dust on the motorway.

Izzy, your MR2 is already a fantastic classic, and with a bit of further work, it’s going to be unstoppable. Can’t wait to see where you let me take it next. Keep cherishing this beauty and see you at the next car show in Wales

Remember to nudge those master techs of yours too about you know what

Steve

The post TUNING THE TOYOTA 3S-GTE (MR2) first appeared on FC TUNING.

Prior to any dyno tuning this lovely MR2 was in for a service and dyno recheck at Redline Motorsport. This resulted in tuning going exceptionally smooth with minimal dyno time needed in order to setup the engine and ecu fully.

WE’ll be seeing this nice example back on the dyno soon no doubt, once the water / methanol injection is all fitted

The post TUNING THE TOYOTA 3S-GTE first appeared on FC TUNING.

The post TUNING THE TOYOTA 3S-GTE (GT4) first appeared on FC TUNING.

The post TUNING THE TOYOTA 3S-GTE (GT4) first appeared on FC TUNING.

The owner already has the bug and future modification are on the way so Ill be expecting to see him soon. Perhaps Tuning Session No 13.. Who knows.. meanwhile…. Enjoy the extra boost of power and torque

The post TUNING THE TOYOTA 3S-GTE (SW20) first appeared on FC TUNING.

The post TUNING THE TOYOTA 3S-GTE (SW20) first appeared on FC TUNING.