Chevrolet Performance 19331517 Manual Del Usuario página 4

Weld the boss in place before installing the sensor. When installed in the vehicle, the MAF sensor should be mounted with the
connector end pointing between horizontal and fully upright – do not mount with the connector oriented downward.
MALF SENSOR MOUNTING GUIDELINES
MINIMUM 6" STRAIGHT SECTION
4"
TUBE
MALF SENSOR MOUNTING BOSS
MINIMUM 10" FROM THROTTLE BODY
Air Cleaner: It is recommended that a dry element air cleaner be used. Chevrolet Performance universal air inlet kit, P/N
19301246 is available for use and meets all of the above requirements.
NOTE: Fueling cannot be guaranteed if an oiled element type air cleaner is used.
Oxygen Sensors
NOTE: It is critical that the Oxygen Sensors are mounted per the instructions below. The exhaust system MUST be
properly sealed – any leak near the sensors (upstream or downstream) can cause incorrect operation of the fuel control
system. Vehicle performance and/or driveability may be affected if sensors are not mounted as recommended or if
an exhaust leak exists. Leak check the exhaust system to ensure adequate sealing (even small leaks can affect fuel
control).
Oxygen Sensors should be mounted in the collector area of the exhaust manifolds in a location that allows exhaust from
all cylinders to be sampled equally (stock exhaust manifolds include a mounting boss for the oxygen sensors). Be sure the
connectors and wiring are routed away from high heat areas. The oxygen sensors should be mounted with the sensor tip pointing
between horizontal and fully downward – do not mount with the tip oriented upward. Weld in the mounting bosses supplied (7/8"
hole) if using headers.
Exhaust Manifolds: It is recommended that you use the provided exhaust manifolds or similar GEN 5 Engine style Exhaust
Manifolds.
Positive Crankcase Ventilation System (PCV)
How to set up your PVC system:
A positive crankcase ventilation system is used in order to provide a more complete scavenging of crankcase vapors. Filtered
air from the air induction system duct is supplied to the crankcase, mixed with blow-by vapors, and passes through a crankcase
ventilation metering device before entering the supercharger. The primary component in the positive crankcase ventilation (PCV)
system is the PCV flow metering device (valve or orifice) . Vacuum changes within the supercharger result in flow variations of
the blow-by vapors. If abnormal operating conditions occur, the design of the PCV system permits excessive amounts of blow-
by vapors to back flow through the crankcase vent tube and into the engine induction system to be consumed during normal
combustion. This engine ventilation system design minimizes oil consumption and significantly reduces the potential for oil
ingestion during vehicle limit handling maneuvers.
The LT4 engine utilizes an integral positive crankcase ventilation (PCV) system which is located in the Valve Lifter Oil Manifold
Assembly beneath the Supercharger Assembly. The Valve Lifter Oil Manifold Assembly contains composite oil separating baffles
and PCV plumbing. Filtered fresh air is routed from upstream of the throttle plate to the engine oil tank where it mixes with
crankcase gasses and is passed to both engine rocker arm covers. The rocker arm covers' design shields rocker arm oil spray,
thereby reducing the potential for oil being drawn back into the tank during backflow of the ventilation system. If oil is drawn back
into the tank it will drain down to the oil pan, which further reduces oil consumption. Blow-by vapors are routed from the valve
lifter oil manifold assembly through a fixed orifice (7.5 mm) within a steel PCV tube, then into the underside of the supercharger
near the front of the valve lifter oil manifold assembly. In order for the PCV system to function correctly, tubing with an 8 mm
inside diameter must be connected from each Valve Cover to the oil separator. The center port of the separator must be
connected to the fresh air inlet between the MAF sensor and the throttle blade.
LT4 Crate Engine Control System Kit
TITLE
ALL INFORMATION WITHIN ABOVE BORDER TO BE PRINTED EXACTLY AS SHOWN ON 8 1/2 x 11
WHITE 16 POUND BOND PAPER. PRINT ON BOTH SIDES, EXCLUDING TEMPLATES.
TO BE UNITIZED IN ACCORDANCE WITH GM SPECIFICATIONS.
AIRFLOW DIRECTION
TO AIR
FILTER
19331508
REV 01FE17
PART NO.
DATE
21JL16 Previous Revision are Archieved
01FE17 Revision - Blake Nye
MAF Sensor Mounting Area
UP
SHEET
REVISION
4 45
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AUTH
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