Stage 4 chip tuning is the highest level of engine tuning and means your car has been modified to the point that virtually nothing remains original. This includes a completely modified engine build, larger turbos, modified fuel systems, gearbox reinforcement, ECU reprogramming, and often the use of racing fuel.
Where stages 1 and 2 are mainly software and slightly mechanical, stage 4 is fully geared towards motorsport level .
What does stage 4 entail?
Stage 4 tuning is purely custom work and usually consists of a combination of high-quality performance parts and advanced software tuning. Common adjustments include:
- Forged pistons and connecting rods
- Fully customized ECU and TCU software
- Large custom turbo or twin-turbo setup
- Reinforced clutch or gearbox
- Fuel pumps and injectors suitable for E85 or race fuel
- Race intercooler, modified exhaust line and air intake
- Reinforced engine mounts and improved cooling systems
- Possibly a standalone ECU (such as Syvecs or MaxxECU)
Sometimes even the cylinder capacity or compression ratio is adjusted for maximum performance.
How much power does stage 4 tuning produce?
The capital gains in stage 4 are enormous, but highly dependent on the starting point. Consider:
- From 150 hp to 400+ hp with smaller turbo engines
- From 300 hp to 700+ hp with V6 or V8 engines
- Race cars with 800 to 1000+ hp are no exception
Please note: Such power requires more than just tuning – it is a complete rebuild of the vehicle , where every component is optimized.
Is stage 4 suitable for street use?
In most cases, no. Stage 4 cars are:
- No longer street legal (due to emissions, noise or modifications)
- Very sensitive to maintenance, fuel quality and temperature
- Only suitable for track days, 1/4-mile races or as a show project
- More expensive to use and adjust
Advice from JT-Products
At JT-Products, we don't perform any tuning ourselves, but we do supply high-quality performance parts essential for reliable and powerful Stage 4 projects. Think of:
- Reinforced couplings
- Fuel systems
- Turbo upgrades
- Intercoolers
- Intake and exhaust systems
Considering Stage 4 tuning? Sound advice is crucial to avoid costly mistakes. We're happy to help you select the right components and fine-tune your engine in consultation with your tuner or engine builder. Want to learn more about what chip tuning or ECU optimization can do for your current setup? Contact our reliable chip tuning partner via WhatsApp.
