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When you're chasing the 1000hp (745kW) mark on a Toyota 2JZ-GTE, you aren't just building an engine; you're building a legend. Whether it’s in a Supra, an Aristo, or a drift-ready Silvia swap, the 2JZ is more than capable of four-digit power, but your fueling strategy will determine if the engine lives for years or dies on the dyno.
To reach 1000hp, you have to move past "standard" upgrades and look at high-volume, high-precision hardware. Here is the blueprint for 2JZ injector selection.
How Much Flow do you Need?
To calculate your injector size, we first have to look at your fuel of choice. 1000hp on pump gas is rare and dangerous; most 2JZ builds at this level run E85.
- For 1000hp on E85: You need to support roughly 100hp per cylinder, plus a 30% tax for ethanol.
- The Calculation: This puts your requirement at approximately 1500cc to 1600cc per injector at a standard 3 bar (43.5 psi) base pressure.
- The Choice: The Excess 1500cc injector kits are the industry standard here. The 1500cc units will be working near their limit at 1000hp, while the 2000cc units provide a massive safety margin for future "boost creep" or even higher power goals.
Top-Feed Conversion
The factory 2JZ-GTE (non-VVTi) comes with side-feed injectors. At the 1000hp level, side-feed technology is obsolete. Side-feeds are prone to heat soak, have limited sizing options, and are notoriously difficult to flow-match.
To hit 1000hp, you must convert to a Top-Feed Fuel Rail. This opens up the world of modern injectors which offer:
- Better atomization.
- Faster response times.
- Superior reliability under high rail pressures.
Why "Exact Match Data" is Non-Negotiable
At 1000hp, you are likely running a massive turbocharger (think 72mm to 80mm). These setups can be "finicky" at low RPM. If you use generic 2000cc injectors without precise dead time data, your 2JZ will:
- Stumble during gear shifts.
- Have a "sooty" or unstable idle.
- Foul spark plugs constantly.
Because Excess Injectors provides the exact scaling and latency data for your specific set, your tuner can make a 2000cc injector behave like a stock 440cc unit at idle, then transition seamlessly into a high-volume firehose when the boost hits 35 psi.
Handling the Pressure
To make 1000hp, you’ll be running high boost, often 30+ psi. Your fuel injectors have to fight against that boost pressure to spray fuel. If your base fuel pressure is 43 psi and your boost is 30 psi, the injector is effectively only spraying at 13 psi unless you have a 1:1 fuel pressure regulator.
For 1000hp builds, we recommend:
- Stainless Steel Internals: 1000hp 2JZs almost exclusively run E85 or Ethanol/Methanol blends. Stainless internals prevent the internala> corrosion that leads to "stuck" injectors.
- High Base Pressure: Running a 50 psi base pressure can help atomization and effectively "increase" the size of your 1500cc injectors if you are right on the edge of your power goal.
The 1000hp 2JZ Setup
If you are building for the four-digit club, here is the recommended "Excess" recipe:
- Injectors: Excess 1500cc (for exactly 1000hp) or 2000cc (for 1000hp+ with headroom).
- Fuel Rail: Aftermarket 14mm Top-Feed conversion rail.
- Fuel: E85 with a triple-pump hanger.
Data: Use the provided Excess data logs to ensure the ECU knows exactly how to handle the massive flow.