UPDATE: A limited supply of the original best-selling Lextreme 1UZFE EGR Delete Kit remains. If you own a 1UZ from 1990-1997, you really need to get this kit! Email me at [email protected] for help with ordering or questions. This will probably be the last kits I have made.

All other parts are SOLD OUT and won't return, including the LS400 and SC400 turbo kit, rebuild kits, supercharger and performace torque converter. We're not an auto parts supplier and I can't respond to inquries for random Lexus and Toyota auto parts.

LEXTREME LEXUS FORUMS HERE! - Post Questions For Quick Answers!

Cartech Fuel Management Unit

cartech fmuCartech Rising Rate Fuel Pressure Regulator is available now for $270.

The page below is copy of Cartech website.

Purpose of the Rising Rate Regulator

The Cartech regulators are designed specifically to add fuel to modified EFI engines (turbos, superchargers and normally aspirated). This is accomplished by using the manifold vac/pressure to drive the fuel pressure up as the boost rises, or with the N/A engines, as the vacuum goes toward atmospheric.

If we already build the best FMU, why make another?

The answer is to keep the copiers way behind. Our original FMU, introduced in 1975, has been copied six times and is still used by four companies.  The 2020 series regulator is the fourth generation design to come from Cartech, and every new design has been better than the previous.

Imagine how vastly better these new designs are than that 25 year old relic the other guys are still producing!

The broad range of tuning capability by changing fuel pressure has yet to be fully explored. We have pioneered this concept with the introduction of the rising rate fuel pressure regulator. It has been created for the purpose of increasing the fuel flow through electronic fuel injection systems when conditions of engine load demand more fuel.

Unique to the rising rate regulator is that the pressure only increases when needed then returns to stock. This concept does not keep the fuel pressure up all the time. The concept of the rising rate regulator is particularly useful in three circumstances:

1. The factory turbo/supercharger car when the stock boost  pressure is increased.
2. An aftermarket turbo/supercharger system applied to an EFI equipped car.
3. A normally aspirated EFI car with modifications that increase the air flow.

These regulators are unique with the adjustability of rate of gain as well as onset of gain. The potential for increasing fuel flows is very large, with as much as 40% more fuel available. This solution is particularly attractive as it is less expensive and tunable.

The regulator installs in the EFI return line after the stock regulator and overrides the stock regulator at full throttle or when under boost. One truly unique feature of our design is the ability to begin raising the fuel pressure before getting under boost. This ability will tune out the inherent turbo/supercharger lean flat spot at the onset of boost.

(Bracket and fittings included)

Key Benefits of the Cartech FMU for Lexus and Toyota cars

  • Billet manufacture
  • Anodized surfaces (opt). We offer plain aluminum, red, blue, or black anodizing.
  • Improved valving
  • Fewer parts with the integrated accessory design
  • Increased the span of adjustment for broader rates of gain. Even the onset of gain is adjustable!  No other regulator has onset adjustment.

Here is the installation instruction from Cartech FMU Installation

Do you have any questions? If so, please head over to the forums to get a quick answer or share your experience!

Cash App (user: $lextremeparts).
This is a freelance site with no support by huge companies.  I have been doing most of the R&D and technical write-ups by myself with my personal money and literally thousands of hours of my time.  I have taken extra steps to demonstrate in details how things are done.  Currently I am one of the few people doing Lexus V8 research and performance enhancement.  This effort comes from my personal love for this wonderful engine.  Most of the modifications are from trial and error. There's no cookbook for 1UZFE mods and its unknown territory for much of supercharger performance.  The parts, labor, web development and site hosting are 100% paid from my personal hobby money.  If you feel my efforts help you in any form, please do not hesitate to donate any amount of money to support this site. You have no idea how much I and the entire Lexus and Toyota community appreciate it!

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