In the previous issue, we began to install Zex’s brand-new LS Series Perimeter Plate Nitrous System for 90mm-or-larger intake manifolds on a ’99 Trans Am, which had been previously modified from a 78mm factory intake to an older 90mm intake from FAST. Helping us was LS-engine builder Chris Kirchner. In this issue, we complete the electrical side of the install and upgrade the fuel pump.
Though a healthy factory fuel pump may be adequate, it’s a risk we aren’t going to take. Running a ’99 fuel pump to the edge of its limits on spray is never a good idea, even back in 1999! Therefore, we ordered a Racetronix plug-and-play fuel system, which features a FPA-001 fuel pump assembly and FPWK-017W hotwire kit to supply the extra juice it needs to operate at peak performance. According to Racetronix, this pump will reliably support 550-600 rwhp depending on the motor’s efficiency, operating pressure, and supply voltage.
Racetronix also offers plug-and-play fuel-system solutions for cars with mods upwards of 1,000 hp. Since we will not be pushing the T/A beyond 600 rwhp, this kit is ideal. With a very tight deadline and some issues still to sort out, dyno-testing will be done in the next issue.