Best Induction Kit / Set up

[jondee86]

A year or two back I was interested in intake restriction and made some
measurements of the pressure difference between atmospheric and the
intake ducting immediately after the throttle body and manifold at WOT.

The first pic is the full OEM JDM intake with snorkel..



The second pic is an Apexi filter with 3" dia alloy intake tube...



In this comparison which was on a 1600 supercharged engine flowing a fair
bit more than N/A engine, the pressure difference for the factory system
was 5.91 kPa @ 7480rpm and with the Apexi it was 1.43 kPa @ 7490rpm.

So a win for the Apexi, but if you were to factor in the higher airflow and
a new filter in the OEM system, the difference would between the two
systems would probably be in the order or 2.5 kPa (0.36 psi). Not a lot
but a small performance gain none the less

Cheers... jondee86