1.8T Engine Tuning Guides
Tuning Guides
Tuning guide for 1.8T AGU engines with 150 PS
Maximum power for Golf 4 and A3 with engine code AGU
Ultimate power for AGU engines with 150 hp
We help with your tuning project – In this tuning guide you’ll find the four tuning stages that will get your AGU engine up to as much as 320 hp. The guide doesn’t just tell you all the parts you need – it provides important tips as well. This is the safe and sure-fire way to maximum power!
And for all those who find that not enough performance, we have put together another bundle for you. With level 5 you get 666 hp!
Installed in:
- VW Golf 4 (Type 1J)
- Audi A3 (Type 8L)
Year of construction:
1998 – 2002
Engine code:
- AGU
The parts listed below should also fit in the largely identical engines AGN, AQA, ARZ, AUM and AUQ with an output between 125 and 180 hp.
The values given are based on our experience with our Golf 4 GTI project.
Stage 1
increased efficiency:
+ 40 hp
+ 100 Nm
Final output:
190 hp
310 Nm
You need this extra to make it last:
You don't need any additional components here. Simply install and have fun! Do not use Longlife oil, our GTX Racing Oil 10W-60 oil is better.
BAR-TEK® TIP!
We recommend filling up with 102 octane fuel. This will give your engine more power because it knocks less! The turbocharger should not be too old. Engine in good condition. The basis must be right.
We recommend filling up with 102 octane fuel. This will give your engine more power because it knocks less! The turbocharger should not be too old. Engine in good condition. The basis must be right.
Stage 2
increased efficiency:
+ 55 hp
+ 110 Nm
Final output:
205 hp
320 Nm
You need this extra to make it last:
To bring the extra power to the road, you need a sports clutch, because the original clutch cannot transfer the power. For the conversion to K04-01 upgrade turbocharger you have to install a racing cat and our upgrade air mass meter. A downpipe is a must.
BAR-TEK® TIP!
If you have already installed a sports cat, an intake hose and an upgrade intercooler, you can continue to use them. With an upgrade intercooler you also have the complete performance available in summer! If you want to get 220 hp right away, order the tuning kit level 3 directly! That saves money.
If you have already installed a sports cat, an intake hose and an upgrade intercooler, you can continue to use them. With an upgrade intercooler you also have the complete performance available in summer! If you want to get 220 hp right away, order the tuning kit level 3 directly! That saves money.
Stage 3
increased efficiency:
+ 110 hp
+ 150 Nm
Final output:
260 hp
360 Nm
You need this extra to make it last:
You also need a sports clutch here. For the conversion to K04-01 upgrade turbocharger you have to install a racing cat and our upgrade air mass meter. A downpipe is a must. Our 1.8T oil cooler ensures optimum operating temperatures.
BAR-TEK® TIP!
With the tuning kit stage 3 you have the extended extension stage of the kit stage 2. Here you have 380 ccm injectors and an upgrade manifold as well as an optimized software! If you have already installed a downpipe, an intake hose and an upgrade intercooler, you can continue to use them. With a large upgrade intercooler you also have the complete performance available in summer!
With the tuning kit stage 3 you have the extended extension stage of the kit stage 2. Here you have 380 ccm injectors and an upgrade manifold as well as an optimized software! If you have already installed a downpipe, an intake hose and an upgrade intercooler, you can continue to use them. With a large upgrade intercooler you also have the complete performance available in summer!
Stage 4
increased efficiency:
+ 170 hp
+ 190 Nm
Final output:
320 hp
400 Nm
You need this extra to make it last:
To drive the full 320 hp power, you have to replace your connecting rods with X-beam connecting rods. A sports clutch kit is required to get the horsepower on the road. For the exhaust you should use a 76 mm exhaust system. The pump must be an upgrade, otherwise there is a risk of engine damage due to slimming.
BAR-TEK® TIP!
A proper chip tuning is required for this conversion. You can send us your control unit or have your vehicle tuned directly in our workshop. Another tip from us: Your brake system is no longer up to the high performance. You can convert it to a Brembo 4-piston brake or to the Audi S3 8L.
A proper chip tuning is required for this conversion. You can send us your control unit or have your vehicle tuned directly in our workshop. Another tip from us: Your brake system is no longer up to the high performance. You can convert it to a Brembo 4-piston brake or to the Audi S3 8L.
Stage 5
increased efficiency:
+ 516 hp
+ 598 Nm
Final output:
666 hp
808 Nm
You need this extra to make it last:
We'll tell you here shortly what you need for 666 hp.
BAR-TEK®
Engine repair guide VW Golf 4 1.8T
Audi 2.5 TFSI (CEPA)
Audi 2.5 TFSI (DAZA)
Audi A4 (B6) 1.8T
Audi TT (8N) 1.8T
VW Golf 4 1.8T
VW Golf 5 TFSI
VW Golf 6 2.0 TFSI
VW Golf 7 2.0 TSI
VW Golf 8 2.0 TSI
VW Passat (3B) 1.8T
+% more
All data at a glance
One less source of error
Detailed instructions
Technical drawings
Cooling guide
increased efficiency:
Final output:
This is how you improve the cooling:
If you want to get the full performance out of your engine, you must not forget the cooling. Even a little extra power puts a lot of strain on your engine! The thermal load increases and affects all areas of your vehicle, even the transmission suffers from the new power. At best, the hard-earned power is reduced again; at worst, your engine suffers major damage. So that you can tune your engine safely and reliably, we provide you with everything you need for perfect cooling. Although it is ideal to install all parts together in a cooling bundle, you don't necessarily have to order everything at once. Each product helps you to improve cooling.
Turbo guide
increased efficiency:
Final output:
The perfect turbocharger for your tuning project
The turbocharger is one of the most important tuning measures of all, as there is huge performance potential in the compression ratio. This is why you will find all the turbos from the guides and suitable alternatives in this special turbo guide, for example if you prefer a specific manufacturer. We have also compiled a lot of information for you on the subject of turbochargers, which you should take a look at. In addition to the detailed turbo tips, there is a page on running in engines correctly, turbo lag and, of course, our 14 turbo rules.
Turbo-Total
1.8T 20V Upgrade Turbocharger K04-01 Stage 1 BAR-TEK®
Stage 1 up to 260 HP
Stage 2 up to 320 HP
Standard turbocharger
+% more
up to 260 HP
Finely balanced
Reinforced bearing
Plug & Play
From
€1,930.21
Garrett
Garrett GTX2860R Gen II Super Core 849894-5001S
+% more
up to 475 HP
Standard Rotation
Ball bearing
Compressor wheel Ø 46mm
sale
Garrett
Garrett GTX3071R Gen II Super Core 851154-5002S
+% more
up to 675 HP
Standard Rotation
Ball bearing
Compressor wheel Ø 54mm
BAR-TEK®
1.8T 20V Upgrade Turbocharger Thor 501 BAR-TEK®
+% more
New design
Integrated Manifold
Bolt-On Kit
Easy to install
sale
BAR-TEK®
1.8T Top Mount Manifold V-Band BAR-TEK®
+% more
With V-band connection
Better response
Performance increase
Increased gas flow rate
Turbo-Total
1.8T top-mount manifold with ext. wastegate connection Turbo-Total®
+% more
Precise boost pressure control
Improved exhaust gas flow
Reduced turbocharger lag
Increased durability
BAR-TEK®
1.8T Top Mount Turbo Manifold Slotted T25
+% more
Shock Charging Turbo Manifold
Better response
Performance increase
Increased gas flow rate
BAR-TEK®
1.8T Audi S3 / TT / Cupra upgrade Turbo manifold High-Flow
+% more
34.5 mm diameter
optimum exhaust gas throughput
significant performance improvement
extremely temperature resistant
Race engines
increased efficiency:
Final output:
Racing engines from BAR-TEK®
If you don't feel like tuning your engine all by yourself, you can also get a ready-tuned engine from us. Our racing engines are designed for maximum performance and maximum driving pleasure and leave nothing to be desired. The components included are perfectly matched, finely balanced and suitable for the highest speeds. Because we use components from motorsport, such as forged pistons and steel connecting rods, our racing engines are extremely stable. This means you get a completely finished engine that not only delivers full power, but is also safe and has a long service life.
BAR-TEK®
1.8T 20V racing engine 1.8L completely over 500 PS capable
+% more
over 500HP stable
1.8l Liter
5 valves/cylinder
BAR-TEK®
1.8T Block 1.8L over 300 PS capable
+% more
1.8 Liter
5 valves/cylinder
over 300hp steady
BAR-TEK®
1.8T Block 2.2L over 300 PS capable
+% more
2.2 Liter
5 valves/cylinder
over 300HP stable
BAR-TEK®
1.8T Block capable on 2.0L over 300 PS
+% more
2.0 Liter
5 valves/cylinder
over 300HP stable
BAR-TEK®
1.8T Race Engine 2.0L completely over 300 PS capable
+% more
2.0 Liter
5 valves/cylinder
over 300HP stable
BAR-TEK®
1.8T RENNMOTOR 2.2L completely over 300HP capable
+% more
2.2 Liter
5 valves/cylinder
over 300HP stable
The performances indicated here are based on our experience and can only indicate a tendency. Each engine is different and many factors play a serious role in the maximum power to be achieved. These include, for example, fuel, chip tuning and mileage. Therefore all data are without guarantee. Put your engine through its paces on our 1000 hp dynamometer.
We are happy to help you!
If you still have questions or need tips, we will be happy to help you. Simply contact us by contact form or write us a message!
His first car was a Polo Mk1 with a 40 Weber twin carburetor and 129 PS (95 kW). His second was an Audi 50. Today Bartek tunes Lamborghinis to 1000 PS (735 kW). Even as a young boy, Bartek disassembled vehicles and put everything back together better. He wrote his high school diploma with oil on his fingers. The trained automotive mechanic with a focus on engines and gearboxes was determined to go into motorsports. In his 10 years in Formal 1, he supervised 73 races, including as engine mechanic for Ralf Schumacher at Toyota. Since 2010, he has dedicated himself fully to his company BAR-TEK® and helps his customers to bring VW and Audi engines to peak performance.
Expert in
Engine
Gearbox
YOUR TUNING EXPERT
BAR-TEK®
–
Your specialist for professional Engine tuning
We love engines, performance and speed. Here you will find everything you need to increase the performance of your engine. Especially the professional engine tuning for VW and Audi is one of our specialties. We are also happy to advise you individually and show you on our dynamometer, what you can get out of your car. In addition, we take over the tuning completely for you. Just give us a call!
Bartek
Bartek
Bartek
Bartek
Europe's No. 1 in engine tuning
Europe's largest store for Audi and VW engine tuning.
Same day shipping
Orders before 12 o'clock go out the same day.
All items are BAR-TEK® proved
All items are tested and checked by us.
15 years of engine tuning experience
Of which 10 years in the top class of motorsports!
BAR-TEK® up close
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