HPF STAGE 4 | 750KW

JEEP TRACKHAWK 6.2L HPF STAGE 4 | 750KW

The HPF Trackhawk Stage-4 upgrade is a comprehensive performance enhancement package designed to significantly boost the power and sound of your vehicle. The process begins with placing your vehicle on a 4WD dynamometer to perform a baseline dyno run. This initial step ensures the vehicle is functioning properly and establishes a performance benchmark for comparison after the upgrades.

The engine is then removed and disassembled. Key upgrades include the installation of the HPF Stage 4 camshaft, valve springs and Phaser limiter/lock. The factory hydraulic lifters are replaced with Johnson high-performance lifters, which feature a redesigned oil pathway. Upgraded valve springs, heavy-duty pushrods, head gaskets, an ATI Super Damper 10% overdrive balancer, and ARP head studs are all part of the reassembly process.

Additional components such as a 160-degree thermostat, 1500cc Excess fuel injectors, a JMS Fuel pump booster, Pacemaker 2” primary headers, ported OEM throttle, and Brisk Spark plugs are installed as well. The installation of a 2.85” high boost GripTec® pulley along with a new belt to suit and a high flow K&N Cold air intake further enhance performance.

For the exhaust system, a Pacemaker dual 3” cat-back exhaust and high flow metallic catalytic converters are bolted to the headers. After reinstallation, the vehicle undergoes custom ECU tuning on the dyno to maximize power and fuel efficiency. The process is completed with road testing to make final adjustments and optimize performance and drivability.

This entire upgrade process takes approximately 7 days, and upon completion, you are provided with a dyno graph detailing the power and torque increase of your vehicle. Additionally, there is an option for Flex Fuel (E85) which can be discussed with the sales representatives.

Cold air intake - The K&N Air Induction (CAI) system features A high-density polyethylene (HDPE) rotationally-molded tube helps increase the volume of airflow to your engine, and provides a guaranteed increase in horsepower and torque. These systems are paired with a washable, reusable High-Flow Air Filter™ featuring oiled cotton filter media. The oversized, conical design allows you to go up to 100,000 miles between filter services under normal highway driving conditions. A custom heat shield helps protect intake air from the high temperature of your engine bay.

Thermostat - HPF offers this premium quality 160-degree thermostat for Hemi Applications. This is a direct drop in with no modifications needed and includes the rubber seal. Reducing engine coolant temperature will help produce more horsepower and improve performance and driveability. The thermostat is an easy to install component and requires no mechanical modifications.

Catback Exhaust system – A ‘Catback’ system is basically all the parts of the exhaust after the catalytic converters. It’s the section of exhaust where all the mufflers are placed and by using larger diameter pipe and high flowing mufflers more performance and better sound is achieved. HPF chooses Pacemaker Exhausts for the Jeep SRT & Trackhawk platform. Made in Richmond, South Australia for almost half a century, Pacemaker are synonymous with performance and quality. Pacemaker build a quality stainless steel dual 3” system and some model specific quad-phat-tips for the ‘Hawk. The sound is deep and meaningful.

Headers & High flow cats – Also known as extractors, we chose a 4-1 design as over the years 4-1 headers have proven their performance advantage over the tri-y design. 4-1 Headers are offered in a few different sizes for different engine applications or modification levels. The catalytic converters chosen are higher flow and feature 100 cpi (cell per inch) for Trackhawk. The catalyst matrix is coated metal so they are built to last. Given the performance the Trackhawk’s Hemi V8 is capable of producing, we choose Pacemakers 2” primary sized, 4-1 headers matched to Pacemakers 3” high flow cats. The catback exhaust bolts to the catalytic converters. Ceramic coating of the headers is optional, talk to one of our sales representatives.

Fuel injectors - HPF only uses premium fuel injectors from Excess Fuel Injectors for the Hemi platform. All Excess Injectors are tested on a custom-built test bench to J1832 standards under strict testing protocol in a purpose-built facility in Melbourne’s South Eastern Suburbs. Every injector set is dynamically flow matched within 1% and deadtime matched within 2%, this minimises time tuning injectors and allows us to get a perfect result every time. We choose extra-large 1500cc to enable the change to E85 or the next level in performance without having to buy another set of injectors and the beauty of the Excess injector data is that our calibrators are able to get the car to still drive perfectly. These injectors come with a Lifetime Guarantee – ask for more info.

Harmonic balancer – In the quest for more boost pressure we chose to add a premium ATI ‘Super Damper’ over-drive harmonic balancer as opposed to a smaller S/C pulley as this minimizes the chance of belt slip. The overdrive segment of the new harmonic balancer does not affect the non-supercharger related accessories run by the OEM drive belt. The ATI Super Damper comes in a 10% over-drive ratio for an additional 3-psi of boost and is pinned to the crank by our technicians to ensure it does not slip. ATI Super Dampers are OEM fitment on Mopar Hemi 392 crate motors and they provide balanced dampening of torsional crankshaft vibrations through all RPM ranges and exceed SFI 18.1 Safety Certification for competition use. ATI is based in Maryland, USA.

HPF HEMI VVT STAGE 4 Camshaft - Optimize your HEMI’s performance with HPF Stage 4 Camshaft. This camshaft is engineered for maximum gains and offers an additional 1900 RPM of usable range while maintaining drivability with aftermarket setups, continuing strong past 7100 RPM. Results achieved with E85 fuel.

Supercharger pulley - The high boost supercharger pulley includes the ZPE Pulley Hub system for the factory supercharged 6.2 Hemi. The Pulley is made from billet 7075-T6 aerospace grade aluminium, stronger and harder than 6061 T6. This pulley is equipped with GripTec® - a unique micro machining technology. This technology allows the maximum grip force to be applied to the component and belt without damaging your belt. Made in California, USA.

Dyno Tuning – By optimizing the engine tune parameters in the vehicles PCM to suit 98 octane fuel, we are able to increase both power and torque and maximise fuel economy. Late model naturally aspirated cars are generally tuned very well from the manufacturer so depending on the vehicle platform mechanical parts to improve the engines intake & exhaust flow may need to be added to really get good gains. Engines fitted with a turbocharger from factory are much easier to enhance as increasing boost pressure by tuning works extremely well. Flex Fuel (E85) is an option, talk to one of our Sales Representatives.

Package Includes

1 x ZPE Griptec 2.85" S/C pulley & K100594HD Belt
1 x 160* thermostat
8 x XS1500 fuel injectors
1 x K&N Cold air intake
1 x Pacemaker 4-1 headers, high flow cats & 3" catback exhaust
1 x ATI 10% overdrive harmonic balancer & crank pin kit
1 x HPF Custom performance camshaft 
1 x Crow Cams Valve Spring kit
1 x Comp Cams Phaser Limiter
1 x Custom Heavy Duty pushrods  
1 x Set Johnson #2326 Hydraulic lifters (16) & guide kit
1 x Set - Gaskets as required
1 x ARP Head Stud kit 
1 x JMS plug & play Dual output fuel pump voltage booster
16 x Brisk Racing spark plugs
8 x Penrite Racing engine oil (litres)
1 x Oil filter
4 x Premium engine coolant (litres)
1 x Wheel Alignment - 4 Wheel
40 x Labour
1 x Custom ECU dyno tune 
1 x ECU unlock fee
1 x Before and after dyno graph
1 x Labour to fit, tune and test

Key Features

The big boy package! This one has the lot, the sound, the looks and the performance and you are talking Fighter Jet speeds....

Notes

• Power figures are estimates only and actual figure's may vary.
• We recommend all vehicles coming to HPF for tuning run 98 Octane fuel. Please contact us if you have a need to use different fuel.
• Power figures listed are estimated kilowatts at the flywheel based on results typically obtained by HPF on HPF’s dynos. Typically these are based of a manual vehicle with standard driveline and standard wheels and tyres. Actual power can vary based on each specific vehicle.
• Modifications such as this package require the vehicle to be in excellent mechanical order.
• We advise against increasing the power output substantially on high kilometer engines, if your engine has in excessive of 150,000kms please contact us to discuss options.
• Whilst every attempt is made to ensure prices listed online are correct, they are subject to change at any time.
• Additional parts may be required in some cases depending on the condition of the vehicle. Cost of these parts and additional labor required may incur additional cost.
• Images are for illustration purposes only

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