Background: The LM440 turbo, which was recently installed, used one of the older M520 turbo tunes as its starting point, as discussed in the initial drive post. The first revision tailored to this turbo was recently installed and logged. Data Logs: Outside temperature during logging was around 5 degrees Fahrenheit cooler than with the first […]
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Background: On hand is a downpipe from CC Design that is the subject of a flow test. This is a 4″ downpipe with a GESi catalytic converter. Flow Test: The flow test involves attaching the downpipe to the flow bench using a 3″ to 4″ silicone coupler and attaching a bellmouth at the inlet of
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With the LM440 turbo installed, I was ready to record some initial data using a previous tune for the larger M520 turbo. This was an early version with similar hardware and a lower boost profile. Boost Turbocharger Wastegate Duty Cycle Turbocharger Outlet Air Temperature Virtual Dyno estimated power and torque. Peak wheel horsepower trend. The
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