The first test of the Forge Motorsport turbo inlet pipe/elbow was conducted using an adapter that simulates an IS20/IS38 turbocharger compressor inlet. This test uses an adapter that simulates a larger turbocharger inlet.
Additionally, a variation of the test will include using the Forge silicone turbo inlet hose in place of the stock GTI accordion hose.
Test one:
First to be tested is the Forge TIP with stock accordion hose and the larger adapter.
This configuration resulted in an airflow reading of 480 CFM at 28″ of H2O.
Test two:
The Forge TIP and Forge silicone turbo inlet hose are tested next.
The combination of Forge TIP and Forge Silicone hose measured 502 CFM at 28″ of H2O. This result is shown on the chart below.
Observations:
This is the first comparison test of an aftermarket inlet hose versus stock using the larger TIP adapter. Using the smaller IS20/IS38 adapter results with an aftermarket silicone hose are typically in the 8-10 CFM range greater than the stock accordion hose.
At the higher airflow rates possible with the larger adapter the use of the Forge silicone inlet hose netted a gain of 22 CFM over the stock accordion hose.
Overall for a Turbo Inlet Elbow that works with the stock size accordion hose the Forge TIP has performed well on both the small and large adapter flow tests.
What is the size of the larger orifice in this test? Most aftermarket hybrid turbo vendors (ourselves included) fit a compressor wheel of ~53mm inducer diameter. Did you use that dimension?
Doug, I use a short piece of silicone hose that has an ID of ~56mm. I need it to be able to fit onto the outlet of the turbo elbow and I haven’t had any good information about another size that would be better representative of a non-stock sized turbo compressor inlet.