Background: After finishing the tune for the Mabotech M520 turbocharger, I decided to see if there would be any benefit from replacing the stock GTI throttle body (TB) with a larger one. A search on eBay turned up an Audi A5 throttle body for $36 – a low enough cost for an experiment with a […]
70 mm Throttle Body Test Read More »
Background: While working on a recent turbocharger swap, I examined my collection of diverter valve (DV) parts and noticed some unusual wear on the stock DV piston. Compared to the new OEM DV that I have, this used one looks rough. I do subject the part to higher temperatures than the stock setup generates. As
Background: During the tuning of the Mabotech M520 turbocharger, a point was reached where the turbocharger wastegate duty cycle began to increase, indicating that the power supplied by the turbine was nearing a maximum for the hardware configuration. The exhaust configuration was changed from a catted downpipe to a catless downpipe to facilitate more power
Catted vs. Catless Downpipe Street Comparison Read More »
