Engine Airflow – Performance & Tuning
Independent Dyno Test By Dan Maslic of Masport Speed Shop
on the VMAX Motorsports
” Velocity Ring” Part No. 102/92
for the F.A.S.T 102mm Intake Manifold.
By: Dan Maslic
An EFI engine’s air induction system is key to making good power. The induction system consists of the air filter assembly, induction hose or tubing, MAF sensor (on most modern engines), throttle body and intake manifold. As many people would have you believe, bigger is better. But can you truly believe this, or is it just hype?
The fact of the matter is that moving more air through an engine requires the ability to move a greater mass of air at high velocities. To make more power, you simply need more air mass to flow through an engine. So, more air mass is never a bad thing when it comes to the potential for making power, but what about the flow properties? To move more air mass requires volume and flow. Making parts larger could possibly allow a greater mass of air to flow through the induction system, but this may not help velocity. Conversely, a smaller sized induction system could help increase flow velocity, but it may prove restrictive in reaching greater mass flow at higher engine speeds. If you understand this, you can see that when it comes to building the optimum induction system for your EFI engine, you enter the realm of compromises.
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