Vortech Engineering GM 7.4 Instruction Manual download pdf (Page 22)

P/N: 4GC020-010

15SEP01 V1.1

(88-95 GM Lt Trk(4GC))

11. AIR FILTER, INLET DUCT AND PLENUM

A. Modify the stock resonator chamber by cutting

off the end at the point where the radius stops.

(See

Fig. 11-a

B. Remove the internal baffle tube and deburr the

cut edge.

C. Fit the new end cover, with the air filter element

provided, over the end of the modified resona-

tor. Secure the cover end by drilling two 3/32"

holes (transfer the location from the cover)

and fasten with the self-tapping screws pro-

vided.

D.Peel off the protective adhesive cover and

place the plenum gasket on the throttle body

adhesive side down. Lower the discharge ple-

num on top of the throttle body and secure with

the two acorn nuts and washers provided.

E. Secure the inlet tube to the two bosses on the

front of the plenum with the two 5/16" x 3/4"

fasteners. On some models, the dashpot as-

sembly interferes with the tube. Two spacers

have been provided to correctly position the

inlet.

F. Connect the inlet elbow to the supercharger

inlet using the blue sleeve and clamps pro-

vided.

G. Connect the inlet tube and elbow together with

the 3-1/2" diameter flex tube and clamps.

H. Connect the new air filter end cover to the inlet

tube with the 3-1/2" diameter flex tube and

clamps.

I. Attach the crankcase vent from the right valve

cover to the fitting on the inlet tube. Slight

trimming of the plastic vent may be necessary.

CUT OFF END AT

END OF RADIUS

STOCK RESONATOR

VORTECH FILTER AND

END COVER

NOTE: On model years 1993 and later, it will be

necessary to replace the resonator unit

with the earlier type prior to modifying.

The Chevrolet part number is 25097949.

NOTE: Do not overtighten nuts or the ple-

num will be damaged.

Fig. 11-a

1 2 ... 17 18 19 20 21 22 23 24

Comments to this Manuals

No comments

Vortech Engineering GM 7.4 Instruction Manual Page 22

Comments to this Manuals

Related products and manuals for Cars Vortech Engineering GM 7.4