IN A world where LS engines seem to rule supreme, it is refreshing to see that there are still plenty of cool Holden projects in the works – like this very streetable supercharged pump-fuel combo from Powerhouse Engines.
John Pilla from Powerhouse built the 355ci Holden stroker for Bud Blandford to put in his HQ Premier sedan.
“I wanted it all under the bonnet,” Bud says. “I’ve had the car since I was 16 and I wanted to keep the body as original as I could. I told Johnny I was only aiming for 600hp, so anything after that was a bonus.”
The combo runs ported cast-iron EFIstyle heads and a Yella Terra/Whipple 2.4L supercharger with a water-to-air intercooler tucked in underneath. After converting the factory VT roller block to four-bolt mains, they filled the bottom end with a COME cast crank, Callies Compstar rods, Mahle forged pistons and a baby hydraulic-roller. Bud wanted the whole thing to run on 98-octane pump fuel, so they sacrificed a bit of horsepower and left the E85 alone. Johnny reckons that sugarcane juice would have the combo pushing over 700 horses with ease.
Hanging off the front of the Holden V8 is a locally made Reidspeed serpentine pulley kit that incorporates the blower drive. Daniel from Reidspeed made a limited number of these ‘blower drive’ kits after a few customers requested.
On the dyno with Haltech Elite engine management, Johnny spun the little Holden screamer to 6700rpm, where it made 663hp, producing 567lb-ft of torque at just 4000rpm. That is plenty of grunt for the HQ Prem this package is destined for. With that kind of power and lowdown torque, it’s going to be one seriously fun street-and-strip combo, and it sounds awesome to boot. We’re looking forward to seeing the finished item.
Amid an ocean of tough LS combos, Bud Blandford strikes a blow for plastic power with his Powerhouse Engines-built Holden V8 stroker.
The 355ci beast runs an Australian Specialty Racecraft (ASR) sump, Pacemaker tri-Y headers and that awesome-looking Reidspeed serpentine pulley system – all crowned by the 2.4L Yella Terra/Whipple blower