Upgrading Fuel Systems for a High-Powered V35A-FTS - V35A-FTS fuel pump upgrade

Upgrading Fuel Systems with a High-Output V35A-FTS

Improving Performance with the Correct Fuel Pump Upgrade

The V35A-FTS engine is a top choice on the performance enthusiast, tuner, and builder’s across-the-board wish list as the new go-to engine for more power, reliability, and modern styling. In Toyota and Lexus vehicles like the Land Cruiser 300, Tundra, Sequoia, and Lexus LX600, this 3.4L twin-turbo V6 is the benchmark for what a performance engine can do within a modern build. V35A-FTS fuel pump upgrade

In this article, we are pushing it to the extreme of the fuel system alterations, the fuel pump in particular, required to get the V35A-FTS to its limit. If you are performing a full swap, updating your existing configuration, or looking for a V35A-FTS engine for sale, we’ve got the performance parts and knowledge you require.

1. Introduction: The V35A-FTS Engine

The V35A-FTS is the revolutionary 3.4L twin-turbo Dynamic Force V6 engine from Toyota. It’s the new-generation behemoth that will replace the old-fashioned naturally aspirated V8s with improved efficiency and so much more tuning room.

📊 V35A-FTS Engine Specs:

Engine Code: V35A-FTS
Displacement: 3.4 liters (3445 cc)
Configuration: V6, twin-turbocharged
Fuel System: D-4ST direct + port fuel injection
Turbochargers: Two single-scroll turbos
Compression Ratio: 10.4:1
Horsepower (Factory): 389 hp (in Tundra/LX600)
Torque: 479 lb-ft (649 Nm)
Redline: ~5800 RPM
Fuel Type: Premium Unleaded
Stock Fuel Pump Flow Rate: ~180 lph

While these motors are strong straight out of the box, with bolt-ons, tuning, and fuel component improvements, the V35A-FTS is capable of being turned into an actual performance monster.

2. Why Fuel System Upgrades Are Critical

When you’re planning to increase horsepower through tuning, turbo upgrades, or performance modifications, your fuel system needs to keep up. A stock fuel pump is engineered to deliver just enough for factory specs — not for aftermarket power goals.

Key Reasons to Upgrade:

Prevent lean conditions during wide-open throttle (WOT)
Enable tuning flexibility for E85, higher boost, or larger turbos
Avoid fuel starvation under heavy loads
Future-proof your build for additional upgrades

3. Factory Fuel System Overview

The V35A-FTS factory fuel system is of the latest technology — port + direct dual injection — for optimum efficiency and emissions. However, with aggressive driving, especially with such fuels as E85 requiring increased volume, the factory fuel pump turns into a bottleneck.

Stock Setup Components:

Low-pressure electric fuel pump (in-tank)
High-pressure mechanical fuel pump (HPFP)
Fuel lines and pressure regulators
Denso injectors (Direct + Port)

4. Fuel Pump Limits at Increased Power Levels

One of the restricting elements in the tuning of the V35A-FTS is fuel delivery limitation, i.e., beyond 500–550whp. Beyond that, the OEM pump cannot provide the high fuel requirement.

Symptoms of Fuel Delivery Problem:

Engine misfire under load
Limitations on tuning (can’t boost or time further)
AFRs lean-running at WOT
Throttle lag or loss of power

5. Choosing the Right Fuel Pump Upgrade

When purchasing a fuel pump upgrade, you will require a solution that suits your power goals, fuel type, and vehicle model. Depending on your goals, you may have to replace the HPFP, in-tank pump, or both.

Brand	Flow Rate	Suits	Notes
DeatschWerks	300+ lph	600–700whp builds	E85 compatible
Walbro 525	525 lph	800+ whp builds	Also known as Hellcat pump
XDI HPFP	High-flow	Direct injection	Replaces OEM HPFP

6. Fuel System Support Upgrades

You can’t solve all flow issues with a fuel pump alone. In order to optimize your fuel system, try these support upgrades:

Fuel Injectors: High-flow or E85-versions (Injector Dynamics, for example)
Fuel Pressure Regulator: Tuned to your system pressure
Fuel Lines & Fittings: AN lines that are ethanol-rated if needed
Aftermarket ECU or Tuning Platform: Needed to alter fuel tables
Fuel Rails: Larger internal diameter for more flow

7. V35A-FTS Fuel Pump Installation Instruction

Fuel pump replacement is done carefully, especially for brand new vehicles equipped with electronic return-less systems and inbuilt fuel modules.

Installation Checklist:

Release the fuel pressure in a safe manner
Disconnect battery before fuel component work
Replace wiring harness or install fuel pump booster (optional)
Use ethanol-resistant material for E85 construction
Recalibrate ECU or piggyback system for optimal fueling

💡 If you’re performing a V35A-FTS swap, put the new pump in first so that you can access it when installing in the chassis.

8. Most Common Mistakes to Avoid

Even master tuners have been guilty of ignoring fuel issues on a build. Watch out for:

Running a non-ethanol-rated pump – will fail
Not tuning after install – AFRs won’t correct themselves
Under-sizing the pump – oversize and use a controller
Wiring or grounding errors – results in voltage drop during heavy load
Not replacing injectors – leads to injector duty cycle to the limit

9. Why Buy From Us: High-Quality V35A-FTS Engines for Sale

We’re not just selling components — we’ve got brand-new V35A-FTS engines for sale, ready for performance builds and replacements. Whether you require a factory-fresh long block or a fully outfitted engine with turbos and fuel system upgrades, we’ve got you covered.

What You Get With Our Engines:

✅ Tested, low-mileage V35A-FTS engines
✅ Fuel system upgrades available
✅ Engine harness and ECU
✅ Swap consultation and support
✅ Shipping globally

📞 Call us about bulk orders, custom builds, or swap packages.

10. Conclusion: Build It Right, Build It Strong

Fuel system upgrade is a step most well worth taking to release the hidden potential of the V35A-FTS engine. Maybe it’s to pursue horsepower, maybe it’s to pre-tune for E85, or maybe it’s to build a bulletproof swap, but the fuel pump upgrade is not a choice — it’s a necessity.

🚀 Upgrade Ready?

Browse our for-sale V35A-FTS engines and performance parts. Our specialists can help design a fuel system to give you the power you want and keep your setup hard-running for years to come.

📦 Upgrade Now?
[Contact us] today to have your high-performance V35A-FTS engine and fuel system parts shipped right to your door!

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Upgrading Fuel Systems for a High-Powered V35A-FTS – V35A-FTS fuel pump upgrade

Upgrading Fuel Systems with a High-Output V35A-FTS

Improving Performance with the Correct Fuel Pump Upgrade

1. Introduction: The V35A-FTS Engine