Existing tapping was for the evap system and read manifold pressure at low
throttle openings, so not suitable for reading intake pressure drop. I drilled and
tapped the throttle body for a new barb and used that. You can see it in this
pic of the new intake system...
Ran tests with the OEM filter and intake system and then with the new system.
The results turned out like this...
Intake Pressure Drop
Apexi Intake; 1.43kPa @ 7490rpm
OEM System: 5.91kPa @ 7480rpm
Engine Manifold Pressure
Apexi Intake: 143.3kPa @ 7490rpm
OEM System: 136.4kPa @ 7480rpm
So by reducing the intake pressure drop by 4.48kPa (0.65psi) I gained 6.9kPa
or exactly 1.0psi of boost
I am more than happy with these results. When
working with small capacity engines like the 4AGE, every little bit counts !!!
Cheers... jondee86