Vortech 1992-1996 5.7L LT1 Corvette - Manual (Page 29)

15
10
5
5 7 10
[5 psi at 3
°
per per lb.]
[7 psi at 2
°
per per lb.]
[10 psi at 1/2
°
per per lb.]
psi Boost
Degrees of Retard
Maximum Retard = 15
°
20. IGNITION/BOOST CONTROL OPERATION
19
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.
21. AUXILIARY FUEL PUMP INSTALLATION
A. Remove the license plate and frame, gas door, gas cap and
rubber fuel overflow catch.
B. Using a 3/4" socket, lower the spare tire and cover assembly.
C. Install the wiring harness/relay assembly into the spare tire
well area on the inside of the bumper (underneath the car).
Use one of the square holes in the seam of the fuel tank, a #10
screw and nylon locking nut to secure the relay assembly. On
some models, a hole for the relay mount may have to be
drilled. Make sure the relay is positioned well inside the spare
tire well to eliminate possible spare tire and fuel overflow
contact.
D. Secure the fuel pump/lines assembly onto the steel mounting
bracket with the provided clamps and #8 fasteners in the
direction shown in the graphic on page 21.
Maximum Retard = 20
°
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 4
°
of ignition retard for
each pound of boost, up to a
maximum of 20
°
.
C. 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.