Vortech Engineering Automobile Accessories 4GD020-010 User Manual

P/N: 4GD020-010

©2001 Vortech Engineering, LLC

All Rights Reserved.  Intl. Copr. Secured

26APR01 V1.2 

(4.3L V-6/S-10-(4GD))

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

°

°

°

°

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