UNDERSTAND THE BUILD
Technical knowledgeFor your engine.
In-depth engine knowledge: clear explanations, worked examples and practical selection criteria for your VAG build.
21 guides
VPP EDITORIAL
Start with the fundamentals
Fuel & intake · GFB · Go Fast Bits
Which GFB valve suits the 1.8T 20VT?
Compare Mach 2, Hybrid, Respons and Deceptor Pro II for the appropriate 25 mm Bosch connection, including adjustment and cabin control.
Fuel & intake · GFB · Go Fast Bits
Pierburg versus Continental: identify the right GFB connection
Engine family is a starting point. Check the original part number, valve manufacturer, mounting flange and vehicle specification before choosing.
Fuel & intake · GFB · Go Fast Bits
GFB DV+ versus VTA: recirculation or audible blow-off?
Compare airflow, actuation and connections before choosing a valve. Find matching alternatives and original installation documents in one place.
Explore the knowledge library
Technical guide · VPP
From parts to a complete build: installation and calibration
How to turn your VPP configuration into a practical workshop plan: part numbers, measurements, installation and calibration with VAG Performance Chip.
Bearings & coatings · ACL
ACL bearings with Calico coating: what actually changes?
CT-1 coating, H/HX, layer thickness and assembled clearance explained when comparing regular ACL bearings with a coated option.
Pistons & rings · JE Pistons
2618 vs 4032 pistons: choosing the alloy for your build
Understand expansion, ductility, coatings and duty cycle, and connect alloy choice to the actual piston specification.
Head studs · ARP
ARP head studs: ARP2000, L19 and Custom Age 625+
From clamp force to kit selection: understand head studs and the differences between ARP2000, L19 and Custom Age 625+.
Camshafts & valvetrain · Kelford Cams
Kelford: compare duration definitions and check timing
Calculate duration and overlap, distinguish crank and cam degrees and establish the references needed for reliable timing checks.
Camshafts & valvetrain · Brian Crower
Brian Crower: recheck geometry after valve and seat work
Why oversize valves change more than flow: seat work, contact pattern, valve operation and installed spring height.
Camshafts & valvetrain · Supertech
Supertech: installed spring height is measured geometry
Installed height, force, coil bind and retainer clearance explained, including single, dual and beehive arrangements.
Sealing · Cometic
Cometic MLS and MLX: sealing within the complete assembly
MLS and MLX explained through surface condition, compressed thickness, clearance volume and the complete clamped joint.
Fasteners · ARP
ARP: the installation sheet belongs to the kit number
Understand preload, friction and lubrication, read a complete kit specification and connect fastening with bearing geometry.
FROM KNOWLEDGE TO YOUR BUILD