LSA HEAD & CAM

LSA | Head & Cam Upgrade

Leveraging relationships with some of the biggest names in the aftermarket performance industry, HPF has developed a premium Head & Cam package for Holden and HSV vehicles powered by the supercharged LSA engine. If significant power gains are what you're chasing, you've come to the right place.
Every build starts with a consultation to understand your goals, driving style, and performance expectations. Based on this discussion, we recommend the most suitable BTR camshaft combination to deliver the results you're after.

Once the plan is locked in, we perform a baseline dyno run to establish your vehicle's starting power figure on the HPF dyno. The cooling system is then drained, and the top end of the engine is disassembled in preparation for the upgrade.

The cylinder heads are sent to Higgins Race Heads for CNC porting, while the original camshaft and lifters are removed. All mating surfaces are meticulously cleaned, and the cam bearings are thoroughly inspected before assembly begins.

Your chosen BTR camshaft is then installed, along with a fresh set of genuine GM LS7 lifters and guides. A Rollmaster single-row timing chain is secured using ARP hardware, while new gaskets are fitted throughout. The CNC-ported heads are assembled with PAC dual valve springs and installed using genuine GM LS9 head gaskets and ultra-strength 240,000 psi head studs.

To ensure reliability at higher RPM, custom-measured heavy-duty pushrods are selected, and the factory rocker trunnions are replaced with BTR's proven Version 2 Heavy Duty Trunnion Upgrade Kit.

Once assembly is complete, the engine is filled with fresh coolant, premium engine oil, and a new oil filter before moving onto the final and most exciting stage – dyno tuning. Our experienced calibrators carefully optimise the tune to maximise performance, drivability, and reliability.
The entire process is typically completed over 4–5 days, and your vehicle is returned with before-and-after dyno graphs showing the gains achieved. The end result is a tougher-sounding, harder-hitting LSA package that delivers impressive performance every time you put your foot down.

Warning: Your new LSA may be a little grumpier than when it arrived. 

CNC ported cylinder heads - The LSA like all other LS based engines benefit from accurate CNC cylinder head porting. We use Higgins Race Heads out of Dandenong Victoria exclusively for all of our cylinder head porting requirements. CNC porting is the computer-controlled reproduction of a port design machined into your cylinder head casting, this ensures each intake and exhaust port not only flows and has the highest velocity as possible but also flows exactly the same as the port next to it. Higgins Race Heads thoroughly recondition the cylinder head including decking flat the surface, CNC combustion chamber machining and valve seat angles, tip and reface the valves, new valve stem seals and fitting the HPF supplied Brian Tooley Racing dual valve springs
 

CAMSHAFT OPTIONS

BTR Stage 1 PDS Torque camshaft - Specs: 217/23X, .619/.607, 114 LSA. This new version of BTR’s Stage 1 PDS camshaft makes more power and torque everywhere in the curve compared to previous versions of BTR’s PDS cams. Developed in house, BTR went back to the drawing board and found more power and torque even with the use of less intake duration. These new BTR lobe designs were Spintron and Engine Dyno tested to achieve the highest overall power curve while also maintaining strict valvetrain stability and durability standards.

BTR Stage 2 PDS Torque camshaft – Specs: 221/24X, .619/.617, 113 LSA. This new version of BTR’s Stage 2 PDS camshaft makes more power and torque everywhere in the curve compared to previous versions of BTR’s PDS cams. Developed in house, BTR went back to the drawing board and found more power and torque even with the use of less intake duration. These new BTR lobe designs were Spintron and Engine Dyno tested to achieve the highest overall power curve while also maintaining strict valvetrain stability and durability standards.

BTR Stage 3 PDS Torque camshaft V2 – Specs: 226/25X .636″/.636″ 112.5 LSA. The V2 PDS Stage 3 Torque camshaft was designed for those customers wanting good low to mid rpm range torque, without sacrificing top end horsepower. This cam has a slightly more aggressive idle than previous versions, yet still provides good drivability. This cam works well with stock long blocks and stock or ported blowers. These new BTR lobe designs were Spintron and Engine Dyno tested to achieve the highest overall power curve while also maintaining strict valvetrain stability and durability standards.

BTR Stage 4 camshaft V2 – Specs: 229/25X, .636″/.636″, 116 LSA. The most aggressive camshaft Brian Tooley Racing offers for GM LSA & LS9 engines. This cam is recommended when looking for more power than the Stage3 application offers and has an ultra-aggressive idle. It is perfect for use in high rpm Max Effort stock displacement, or 4″ stroker applications when paired with a Harrop H2650i or Whipple 3.0 superchargers. BTR recommends the use of aftermarket or ported OEM cylinder heads and larger throttle bodies when used with higher boost levels. This cam uses ultra stable lobes for higher RPM potential, and has proven to be extremely durable in testing.