Big Turbo Tune: VW GLI/Jetta – MK4 (1.8T)

From eliminator kits to complex builds, we’ll help you take your Jetta to the next level.

STARTS AT $789.00. PLEASE COMPLETE A BIG TURBO QUOTE REQUEST FORM

Model Years: 2000-2005

*Please contact us with questions about model years.

Talk to us about your power goals, your modifications, and we’ll help you get there.

Required Upgrades:
Injectors (Bosch 550cc minimum)
Upgraded Diverter Valve
Upgraded Turbo
High-Flow CAT
FMIC
Upgraded Fuel Pump

Recommended Upgrades:
3″ or larger MAF Housing
Upgraded Rods

Power Gains:
300-600hp / 300-500lb-ft

Power gains will vary based on modifications, fuel type, and testing conditions.

Model years may shift for some European and ROW markets.

Injectors MUST come from a reputable source. See below for more information.

For customers planning to run E85, we suggest at least 750cc injectors and upgraded rods.

Model year 2000/narrowband customers should consider a wideband conversion.
Please feel free to contact support if you have questions prior to submitting a quote request. There’s a lot of info here.

REMOTE TUNING KIT INCLUDES:
Selected ECU Software Upgrade
Motoza MX-USB Interface
MotozaPS for the PC

Free Motoza Member account, which lets you store, upload, and download data logs and tuning files online.

Unless prior arrangements are made, log reviews must be used within 6 months of initial set up. Hardware changes made after initial set up may incur a fee.

Tune is a virtual product that will be uploaded to your account. Box images are representational only. Your tuning cable will be shipped.

FEATURES:
Flashed DIRECTLY to the ECU with remote tuning kit (included FREE)
Flash your tune in your own garage, no need for a dealer
Extensively tested and proven to provide superior performance
Increased power and torque
Optimized for responsiveness, drivability and smooth operation
Rev-limiter raised
Speed restrictions removed
Easily upgrade your tune at a later time

Upgrade to MTC (multi-tune control) available – 2 map option for model year 2000, 4 map option for 2001 & later

From GTRS eliminator kits to complex builds, we support just about any turbo.

Injectors must come from a reputable source. Injectors larger than 1000cc are supported, but must come from one of three modifiers. May include 3bar MAP sensor, larger MAF housings, blow through MAFs, ProMAF. Rods and/or upgraded valvetrains may be required depending on power goals. Big port head supported and suggested for higher horsepower goals. Cams, displacement/compression changes, upgraded or aftermarket throttle bodies are supported. Water methanol and ethanol supported. 3bar MAP pressure requires rods. E85 use with most turbos requires rods.

The narrowband ECU found on model year 2000 in North America has some limitations. The ECU lacks the resolution to handle injectors larger than 550cc well, effectively limiting you to a GT28 series turbo. Wideband conversion is possible and the real time fuel correction provided by a wideband primary O2 sensor is much safer for your investment. We offer wideband conversion kits if needed. Upgraded MAP sensors are not supported on narrowband vehicles.

After submitting a quote, we’ll be in touch with pricing and/or suggestions.

WHAT YOU’LL NEED

A Windows 7, 8, 10, or 11 laptop with a USB-A port. Chrome OS and MacOS are not supported, but software requirements are minimal; if your computer meets the minimum requirements for your version of Windows you’re good to go.

You’ll need an internet connection to download and upload files but not for flashing and logging.