Hello everyone,

Thank you for the welcoming. In comparing our turbo kit to Speedcraft's, it is in my opinion that they should produce more peak hp but the midrange might not be as stout. Both kits are good and I will explain our kit in more detail.

Where the S2000 needs the greatest boost is below VTEC engagement. Our kit achieves not only adding generous hp to the top end, but greatly improves midrange power. This is especially important powering out of corners and switchbacks on the track, and for street applications.

Our Ultimate Racing turbo kit includes a tuned piggy-back computer (E-Manage) utilizing the best of both worlds. The drivability and refinement of the stock computer and the adjustablilty of fine tuning specific paramters to produce safe, reliable power with excellent driveability.

This computer add-on seemlessly communicates with the stock computer's sensors such as the throttle position sensor (TPS), MAP sensor, and other associated sensors that are imperative to the cars driveability characteristics.

The E-Manage modifies the stock ECU's pulse width signal which determines the duration (in ms) the injector remains open. In various situations (on and off boost, idle, etc.) the laptop tuned E-Manage will recognize and change the injector pulse width accordingly. Behaviour of part throttle, start-up, on / off boost retains stock drivability.

Larger injectors are used correctly to fend off fuel cut (when the maximum fuel delivery is achieved through the injectors) and ensure reliability, driveability, and longevity. Other systems that use just a fuel pressure riser (ie. Speedcraft) may increase the fuel pressures too high for the stock injectors. This is a simplistic method to add more fuel at the cost of the longevity of the injectors and driveability.

By using a fuel pressure riser (FPR) that normally increases the fuel pressure by a rate of 10:1 or 12:1 (10 or 12psi of fuel to 1psi of boost pressure), injector stress may occur. For example, at 6psi, the FPR (12:1) will add 72psi of fuel pressure to the stock rail pressure! Most factory injectors including the S2000, are not meant to see fuel pressures of over 100psi. This is why Ultimate Racing uses the multitude of tuning parameters of the piggy-back fuel computer and larger injectors. In addition, timing advance, low and high throttle loads can be taken into account unlike the simple FPR.

Thank you for your inquiries.