Installation manual

Part #1574, 1575, 1576

Brochure #63-1574

Rev. 9/24/14 - QT

Edelbrock GM LS3 Supercharger System for

2010 and later Grand Sport Corvettes

Installation Instructions

Page 28

190. Tilt the manifold back slightly to install the small

factory vacuum hose running from the driver side firewall

fitting on the small fitting on the driver side of the air inlet

and the brake booster hose onto the larger fitting then

secure the brake hose with a clamp supplied in Bag #2.

191. Use a 10mm universal socket with an extension bar

to install the eight intake manifold bolts following the torque

sequence below. Torque the bolts to 4 ft-lbs in the first

pass, then to 7.5 ft-lbs in the second.

192. Use a 3/8” Fuel Line Removal Tool to remove the fuel

input line from the firewall fitting.

193. Take the fuel injectors out of their boxes and remove

their protective covers.

194. Apply o-ring lube to the upper injector seals, then

slide the injectors into the rails so that the electrical

connectors face away from the mounting flange.

195. Apply O-ring lube to the sealing ring of the four

supplied fuel rail fittings. Use a 3/4” wrench to install the

two straight hose fittings on the radiator side of each fuel

rail then install the plug in the firewall end of the passenger

side fuel rail and the U-shaped fitting on the firewall end of

the driver side rail. Orient the fitting close to the injector,

leaving room for the injector connector.

196. Connect Manifold to EVAP Solenoid hose to the outer

EVAP solenoid fitting and EVAP Solenoid to Firewall Hose to

the inner EVAP solenoid fitting. Route Solenoid to Firewall

hose beneath hub snout and along driver side valve cover

to firewall fitting and connect it.

197. Apply O-ring lube to the lower seals of each of the

fuel injectors.

198. Attach the supplied fuel rail crossover line to the

fitting on the passenger side fuel rail.

199. Install the fuel rails by sliding the injectors down into

the manifold provisions and applying pressure until the

mounting holes in the rails line up with the manifold. Slide

the crossover hose under the snout and air inlet of the

supercharger as you install the passenger side rail then

connect it to the driver side fuel rail fitting.

200. Use a 5mm Allen tool to install four 12mm fuel rail

bolts supplied in Bag # 3 and torque them to 91 in-lbs.