Inlet Elbow with Airfoil Insert

TIP PCV Port Test 2

Background: A few weeks ago I made some initial measurements of the vacuum generated at the inlet elbow PCV port with the stock turbo inlet elbow, an aftermarket elbow, and a prototype I was working on. I had an idea to try and increase the vacuum inside the prototype elbow by building a raised area […]

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Eventuri Intake with Inverted Air Filter

Inverted Cone Filter Flow Test

Background: As part of my project designing an intake, a decision about the type of air filter was needed. Most aftermarket intakes I have tested use a cone-style filter, and the abundance of options makes sourcing a filter that would fit my prototype easier. The intake I am presently using on my GTI is from

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Oil Extractor

Mityvac Oil Extractor

Background: I’ve been using an oil extractor with my GTI for a couple of years. I’ve seen several comments from the internet from people who don’t use these because they want to be sure that they get all of the oil out of the oil pan. Oil change: I had read some of these comments

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