16-07-2014, 08:42 AM
Turbochargers really struggle with ANYTHING on the inlet. That's because the airspeed going in as Dave says is incredibly high, trying to blow through a mesh filter is pointless since you can never simulate the conditions that are going on inside a turbocharger.
This is a brand new Garrett 4th gen GTC turbo - they run with insanely small compressors (44mm exd) yet will do 180hp with ease...
![[Image: 2je1h0n.jpg]](http://i61.tinypic.com/2je1h0n.jpg)
Notice the massive step up to the air intake hose connection? That's because if you put a hose the size of the compressor inducer on there, it'd seriously struggle for air - that's because as you increase hose size, the airspeed will drop. Naturally if you make it the same size as the compressor inducer all the way down, your airspeed would be the same all the way down the pipe! Meaning that you're trying to accelerate air upi to 150mph in a hose - errr not going to happen, so you end up with a big vacuum on the turbo inlet, causing restriction.
If however the mesh had lots of surface area - i.e. like a cone filter! It'd be fine, that's the whole point of the cone shape - it gives lots of surface area to pass and filter air through. If you just put a tea strainer over the turbo inlet, I'd say probably 1/5th of the area over the inlet is metal - that means you've increased airflow a significant amount through those tiny holes in the sieve... You're probably trying to get the air through those teeny tiny holes at 170mph or so...
This is a brand new Garrett 4th gen GTC turbo - they run with insanely small compressors (44mm exd) yet will do 180hp with ease...
Notice the massive step up to the air intake hose connection? That's because if you put a hose the size of the compressor inducer on there, it'd seriously struggle for air - that's because as you increase hose size, the airspeed will drop. Naturally if you make it the same size as the compressor inducer all the way down, your airspeed would be the same all the way down the pipe! Meaning that you're trying to accelerate air upi to 150mph in a hose - errr not going to happen, so you end up with a big vacuum on the turbo inlet, causing restriction.
If however the mesh had lots of surface area - i.e. like a cone filter! It'd be fine, that's the whole point of the cone shape - it gives lots of surface area to pass and filter air through. If you just put a tea strainer over the turbo inlet, I'd say probably 1/5th of the area over the inlet is metal - that means you've increased airflow a significant amount through those tiny holes in the sieve... You're probably trying to get the air through those teeny tiny holes at 170mph or so...
