Oil feed line – Vortech 1990-1995 5.7L TBI Truck/SUV User Manual

Page 11

P/N: 4GB020-010

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.

Fig. 4-a

Fig. 5-a