Brendan’s Holden HQ Coupe blasts into the eight second zone at Heathcote. Driven to and from the track, the big Holden street car is powered by a 403ci GM LS V8 engine and boosted by a large Garrett turbocharger.
1973 Holden HQ coupe
GM LS3 V8 engine 403ci
LQ9 iron block, LS3 heads
Callies crank & rods, forged pistons
Allsparks hydraulic roller camshaft
Garrett GTX45R turbocharger @ 18psi
VE Commodore reversed manifolds
Turbosmart 50mm wastegate, eBoost 2 controller
GM computer, E85 fuel system
Preston Automatics Powerglide, Reid case
3500rpm stall converter
9in diff, 35-spline floating axles
Full exhaust, MT 315/60 radials
Tuned by: Allsparks Automotive
Driven to and from the track.
Heathcote Park Raceway, Australia – July 5th 2015