Vortech 1987-1997 Ford 7.5L Truck/SUV - Manual (Page 17)

P/N: 4FB020-010
©2001 Vortech Engineering, LLC
All Rights Reserved, Intl. Copr. Secured
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.
9
Fig. 13-a
15
10
5
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 10
PSI BOOST