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Frequently Asked Questions

Frequently Used Acronyms:

MAF - Mass air flow sensor

DV - Diverter Valve

BOV - Blow off valve

TIP - Turbo inlet pipe

TB - Throttle body/turbo-back exhaust

CAI - Cold air intake

IC - Intercooler

What is 1.8t?

The 1.8t is shortened for the 1.8 liter turbo 20 valve motors built by Volkswagen. Thes motors are capably of producing over 300 wheel horsepower by installing simple bolt-on modifications.

What is VCT?

VCT or Variable Cam Timing. Synonymous with Variable Valve Timing The AWW, AWP, and AWV engine codes have VVT, while the AWD and APH do not. The VCT in later 1.8T's is simply for emissions purposes. It has only two states - normal and massive overlap. The overlap is used to draw exhaust gasses back into the cylinders at startup.

What is Surging?

Compressor surge is where the air backs up in the compressor and oscillates violently within the compressor wheel. This happens when the engine's swallowing capacity is exceded by the compressor's output.

What are coil packs?

The 1.8t motor has a slightly different ignition system than most of us are used to, replacing the more traditional distributor and ignition wires are coilpacks. Coilpacks sit directly ontop of your sparkplugs and are located directly underneath your engine cover. You need to remove your coilpacks in order to change your sparkplugs. Coilpacks work in much the same way as a traditional ignition system in that they power up the sparkplug to create a spark and transfer potential energy in the head into kinetic energy through combustion. In general many people have had certain problems with their coilpacks, chalk it down to improper sparkplug gapping, faulty modules or a host of other conditions. There was a running change in late 2000 where the coilpacks were redesigned and the manufacturer changed. The original coilpacks were produced by Hitachi and used allen keys and clips to hold them in place. Very few of these failed.