Unleash Your 2jz Engine's Potential with Specialized Coil Pack Upgrades

Understanding the 2jz GTE Coil Pack

The 2jz GTE engine has earned an iconic reputation in the tuner community for its immense power potential. This robust inline-six cylinder engine responds very well to modifications and is capable of handling immense boost pressures from forced induction systems.

One key component that plays an integral role in delivering optimized ignition spark to the 2jz engine is the coil pack system. Upgrading or optimizing your 2jz GTE coil packs can help unlock more power gains through better combustion.

What is a Coil Pack?

A coil pack contains multiple ignition coils combined into a single cylindrical housing. Each ignition coil has two primary contacts that receive input voltage from the ECU. It also has two secondary contacts that route high voltage current to each spark plug.

This arrangement eliminates the need to have individually wired ignition coils and streamlines the overall ignition system. Some advantages of coil packs include:

• More compact design
• Simplified wiring
• Individual coil failure does not disable the entire ignition system

2jz GTE Coil Packs

The factory 2jz GTE engine utilizes a direct ignition system coil pack consisting of six ignition coils packed into a single casing. This provides one coil for each spark plug in the inline-six cylinder layout.

Being a VVTi variable valve timing engine, the ECU precisely controls ignition timing to match the operating conditions. This is what gives the 2jz engine its wide powerband.

Potential for Upgrades

When increasing power output substantially from the factory rating, it becomes prudent to also upgrade supporting ignition components like the coils and spark plugs. Higher cylinder pressures require a greater intensity spark for complete combustion.

Some options for upgrading include:

• High output aftermarket coil packs
• Individual ignition coils
• Higher heat range spark plugs
• Reducing plug gap for increased spark density

Aftermarket Coil Pack Options

There are a few main options for upgrading 2jz GTE coil packs:

Toyota OEM Coil Packs

Sticking with OEM Toyota coil packs is a safe bet for mild power builds under 400whp. These provide a slight boost over the factory coils but reuse the same connectors.

MSD Blaster Coils

A more specialized aftermarket option is the MSD Blaster series coils. These are capable of outputting 40-45kv which improves spark delivery. Custom wiring adapters need to be fabricated.

LSx Conversion Coils

A popular coil upgrade is adapting GM LSx style coil packs to the 2jz engine. These bolt directly to LS engines but can be mounted to custom 2jz coil pack covers. You also need a GM coil driver module to control them.

Custom Mounting the LS Coils

The first step is getting coil pack covers CNC machined to secure the LS coils over each spark plug. Companies like Ignition Project, PPRO Engineering, and RAILS Unlimited offer billet mounts.

You'll need to notch clearance for the plug boots and thread the securing bolts. It helps to remove anyunused ignition outputs so you only have active terminals for all six cylinders.

Next is wiring up the power and signals to control the coils. An add-on ECU driver like the ACCEL U-Fire is needed to convert signals properly from your 2jz ECU.

Benefits of Converting to LS Coils

Why go through the trouble of adapting LSx coils instead of easier plug-and-play options?

Some benefits include:

• Capability of generating 60,000+ volts
• Increased spark energy improves cylinder pressures
• Proven reliable with high cylinder boost
• Retains progressive ECU control

By converting to these specialized coils, you'll have sufficient spark output to support big turbo builds making 800+ horsepower.

Final Checklist Before Installation

When receiving all the necessary LS coil conversion parts for your 2jz swap, here are some things to check:

• Verify the connector type matches your ECU system
• Inspect mounts to ensure they bolt up without issue
• Make sure the coil driver wires properly into your harness
• Heat protection is added for turbo manifold clearance
• Secondary plug boot angles align with spark plug tubes

Taking care to get these details right ensures a smooth install and optimized performance. With these upgraded coils providing tremendous spark energy, your monster 2jz build will be primed to lay down some serious power!

FAQs

Do I really need to upgrade my coils for a big turbo 2JZ?

Most engine builders recommend upgrading your ignition to complement big turbo 2JZ builds making over 500hp. The increased cylinder pressures require stronger spark intensity for clean combustion.

Can I just replace the coils without touching wiring?

Swapping coil packs usually requires adapter harnesses or external coil drivers to properly interface signals designed for different ignition systems.

What other ignition upgrades work with coil upgrades?

Higher heat range spark plugs, increased spark plug gaps, upgraded ignition wires, and external capacitors work well with high-power coils.

Is tuning/programming needed for aftermarket coils?

Yes, your 2JZ ECU will need adjustment to timing maps and dwell times to match the operating profile of upgraded coil packs.

How long do aftermarket coils typically last?

When sized properly and not subjected to excess vibration, aftermarket performance coils can operate reliably for years even in high boost applications.