Final check, Ignition/boost control unit operation – Vortech 1987-1997 Ford 7.5L Truck/SUV User Manual

Page 17

P/N: 4FB020-010

27JUL01 V1.1

(7.5 Ford 460(4FB V1.1))

A. The Ignition/Boost Control unit is designed to

retard ignition in relation to boost.

B. The unit is adjustable from 0

of ignition retard

to 3

of ignition retard for each pound of boost.

(See

Fig. 13-a.)

C. The maximum amount of retard that is avail-

able is 15

total.

D. Using the 1

per pound position as a starting

point, adjust the ignition retard knob until just
beyond the point of detonation. Use third gear
for testing in a safe area or road. Adjust the
retard according to changes in altitude and fuel
quality.

14. FINAL CHECK

A. Reconnect the battery.
B. If your vehicle has gone over 10,000 miles since

its last spark plug change, you will need to
change the spark plugs now before test driving
the vehicle.

C. Check all fittings, nuts, bolts and clamps for

tightness. Pay particular attention to oil and fuel
lines around moving parts, sharp edges and
exhaust system parts. Make sure all wires and
lines are properly secured with clamps or tie
wraps.

D. Check all fluid levels, making sure that your

tank(s) is filled with 92 octane or higher fuel
before commencing test drive.

Example of Ignition Retard vs. Boost:

CAUTION:

It is extremely important that the

boost retard never be turned to
0

. It is recommended that in

stock street applications, the
knob be at no less than 1

/lb.

13. IGNITION/BOOST CONTROL UNIT OPERATION

WARNING: Do not attempt to operate the vehicle

until ALL components are installed
and ALL operations are completed
including the final check.

Fig. 13-a

5 psi at 3

per lb.

7 psi at 2

per lb.

10 psi at

1/2

per lb.

MAX. RETARD = 15

DEGREES OF RET

ARD

5 7

PSI BOOST