(AAM) and Turbo XS (TXS), our fuel delivery and engine management. I was one of the first to receive the AAM return fuel solution and race duty swirl tank fuel system. This system eliminates the OE in-tank fuel pressure regulator to provide reliable boost induced fuel needs.
With hungry 750cc RC engineering injectors clamped tightly in the AAM billet fuel rails, one fuel pump simply won’t get the job done. A Walbro GSS342 HP in-tank pump feeds the AAM swirl tank. From there, a race duty BOSCH external fuel pump sends the fuel to the engine.

The AAM team helped again when they discovered an exhaust “bottle neck” in the design of the Greddy waste gate placement. For up to around 14 psi, it wasn’t an issue, which is more than enough for most users. Once we dialed the pressure to 18 pounds, the gremlins appeared. The way Greddy has the exhaust recirculation path entering back into the stream at a 90 degree angle, caused a very strange boost response. The two exhaust flows were fighting each other. To eliminate this issue, we completely replaced the turbocharger outlets with full 3” down pipes and relocated the waste gates. The waste gates now have atmospheric outlets and command attention under full load. Imagine a jet flying by you at about the head level. Problem solved!

The TXS UTEC fuel management system is very unique. It’s a “plug and play” parallel computer that takes over all functions of fuel and ignition timing while allowing the factory computer to remain happy in control of all other functions. With newer technology and drive-by-wire throttle control of the VQ35, keeping the OE ecu in place in a necessity in road going cars. The 350z UTEC was just making its way into a few select cars across the country. We begged and begged and bribed the guys at TXS until one showed up at our door step. After a co-op session of working out the bugs with TXS tuner extraordinaire Jermain and gaining our UTEC prowess,

Car V2 is a Turbo XS certified UTEC tuner, which explains the daily drivability of the 350Z your reading about.
Tuned on the Car V2 Dynapack dynamometer, the boosted 350Z put down a healthy 500 WHP and 500 ft/lb TQ at 15 psi on 93 octane pump fuel. A twist of the BLITZ SBC-id dial and more UTEC keystroking produced a whopping 565 WHP and 576 ft/lb TQ at 18 psi still on pump gas. With VP Fuels C16 in the tank and the 18g’s at full song, this white 350z puts down an amazing 624 WHP and 674 ft/lbs TQ at 24 psi. This is over 700hp engine horse power. Understand, these power levels are realized on the stock crankshaft, cams, and no machining at all. To reiterate, the cylinder heads have not been touched. No plenum or throttle body modifications exist. The VQ starts on the first crank and runs lean and clean under normal driving duty. It's a rather well mannered vehcile, at least until you pass 50% throttle.