Vortech 1990-1995 5.7L TBI Truck/SUV - Manual (Page 11)

P/N: 4GB020-010
©2002 Vortech Engineering, LLC
All Rights Reserved, Intl. Copr. Secured
22FEB02 V1.1 (LT. TRUCK (4GB V1.1))
4. OIL FEED LINE
A. The supercharger uses engine oil for lubrication
and must have an oil feed line connected to a
filtered oil access on the engine and an oil return
or drain. The return is a gravity drain and should
be routed to provide a gradual drop. Connection
to the oil pan must be above the oil level.
B. Remove the 1/4" NPT (pipe) plug from the hole
located on the engine block just above the oil filter
and replace with the 1/4" NPT to flare adapter
fitting provided.
C. Connect the 1/4" oil feed line to the 1/4" NPT to
adapter fitting. Route the line forward along the
top rail of the oil pan next to the drain line upward,
towards the supercharger's future location. Se-
cure to the drain line with the tie wraps provided.
D. Temporarily cover the end of the hose and protect
it from dirt until connecting to the supercharger.
OIL PAN
ENGINE BLOCK
CLAMPS
TIE WRAPS
A. Remove the TBI unit from the manifold. Remove
old gaskets and clean the gasket surfaces.
B. To prevent pressurized fuel and air leakage around
the throttle shaft, it is necessary to normalize the
pressure. To accomplish this, modify the throttle
body by drilling two small holes from the base
surface to the throttle shafts. You may “layout”
the location by following the template on page 6
or transfer it directly from the gasket provided.
Use a small center drill to start, then a #56 or 3/64"
diameter drill bit and drill through the base of the
throttle body until the bit firmly contacts the shafts.
C. Assemble the throttle body, the new injector spacer
block and gaskets. Place the gasket without
holes on the bottom. Use the two special threaded
rods and nuts provided to secure the throttle body
and the Vortech SFIC spacer to the manifold.
5. SUPPLEMENTARY FUEL INJECTION COMPUTER AND RELATED SYSTEM
WARNING: The oil system contains a small ori-
fice that is easily plugged. DO NOT
use any type sealant on any feed
line threads. Instead, use clean
engine oil. Disassemble and blow
out entire line if you have any
doubts.
3
Fig. 4-a
Fig. 5-a