170mph on IRS | Nitrous LSX Holden

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Tim’s VX Commodore has long been one of the quickest IRS suspension cars in Australia. Built by TJH Performance, the dry sump LSX features forged internals as well as Australian made Higgins 6-bolt heads. A GM computer is still in place tuned by Stef at Westernlink Automotive. At the Melbourne round of the APSA Pro Street Shootout, Tim was looking to better his P.B of an 8.55.

Holden VX Commodore SS – TUFSS3 Owner: Tim Holmyard | TJH Performance
LSX V8 engine 444ci, Dart block Callies crank, Carrillo rods, CP pistons
HRD LS7 6-bolt cylinder heads (CNC ported by Higgins Race Heads) HRD spec solid roller camshaft, HRD valve covers
Dailey Engineering dry sump billet oil pan Marcella tunnel ram inlet manifold
Wilson Manifolds 2000cfm 4-barrel throttle bodies GM computer, MSD ignition
Direct port 300hp progressive nitrous system Powerglide transmission, 28×10.5in slicks
IRS rear end – 9in alloy diff, BMR CV’s, 35-spline axles Tuned by Stef @ Westernlink Automotive
Power: 921hp N/A | Engine dyno 1150+hp nitrous | Chassis dyno

Special thanks to:
Nathan @ Higgins Race Heads
Stef @ Westernlink Automotive
Sam @ Sam’s Performance
Johnny @ PTC
And everyone who has helped along the way

APSA Australian Pro Street Association
Calder Park, Melbourne, Australia – Feb 2017

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