For our Three-Valve intake test, we headed to Blow-By Racing in Boca Raton, Florida. One of the company's shop cars is an '05 GT with ported heads and aggressive camshafts, which makes it a ...

Test 8 was our all-out test to see how much we could make with Ford Racing's newest Three-Valve components (Three-Valve intake manifold, Stage 3 CNC-ported cylinder heads, and Hot Rod camshafts).

Prestige Motorsports tests four different intake manifold and throttle body combos to determine their performance potential.

A vacuum leak anywhere in the engine’s intake manifold system will cause rough running, stalling and be most problematic as the engine returns to idle.

Hong Su, James Kempf, Bill Montgomery, Ryan Grimes, CAE Virtual Test of Air Intake Manifolds Using Coupled Vibration and Pressure Pulsation Loads, SAE Transactions, Vol. 114, Section 3: JOURNAL OF ...

A vacuum leak anywhere in the engine’s intake manifold system will cause rough running and stalling, and will be most problematic as the engine returns to idle.