Vortech 1996-2000 4.3L Truck/SUV - Manual (Page 13)

P/N: 4GD020-010
©2001 Vortech Engineering, LLC
All Rights Reserved. Intl. Copr. Secured
26APR01 V1.2 (4.3L V-6/S-10-(4GD))
7 . COIL RELOCATION/IGNITION INSTALLATION, cont'd.
2. SUV models (Blazer/Jimmy)
a. The suggested mounting location is in the
storage box located next to the back seat on
the passenger side of the vehicle.
b. The retard knob and MAP sensor can mount in
the center console as the pickup trucks do (see
Fig. 7-f). The brown retard wire and thin red
power wire must be run over to the remote
mounted ignition box.
F. Connect all components as shown (see Fig. 7-a).
Connect a manifold sourced vacuum line using the
supplied 5/32” hose and TEE (use the FMU tap location).
Route the extended coil wires and previously attached
vacuum hose from the engine compartment back along
the frame rail and to the transmission crossmember.
Drill a 5/8” hole through the floor of the vehicle from
the bottom of the center console location for wire/
vacuum hose pass through. Route the wire/vacuum
hose bundle up into the passenger compartment using
the previously drilled hole.
G. Use the supplied cable ties to keep the wires secure
and away from moving/sharp/hot objects. Do not
attempt to start the vehicle without all components
installed as shown.
H. Ignition Boost Control operation
1. The Ignition/Boost Control unit is designed to retard
ignition in relation to boost.
2. 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
°
.
3. Using the 1
°
per pound position as a starting point,
adjust the ignition retard knob until just beyond the
point of detonation (see
Fig.7-e). Use third gear for
testing in a safe area or road. Adjust the retard
according to changes in altitude and fuel quality.
7
MAP
SENSOR
RETARD
KNOB
VACUUM LINE/
WIRING
HOLE
THROUGH
FLOOR
CENTER
CONSOLE
IGNITION
CONTROL BOX
PICKUP TRUCK MODELS
SUV MODELS
IGNITION
CONTROL BOX
MAP
SENSOR
RETARD
KNOB
HOLE
THROUGH
FLOOR
PASSENGER SIDE
STORAGE
COMPARTMENT
CENTER
CONSOLE
VACUUM LINE/
WIRING
Examples of Ignition Retard vs. Boost:
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
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
°
per lb.
Fig. 7-f
Fig. 7-g
Fig. 7-e