1990 Pontiac Turbo Grand Prix

Performance Statistics

GT2871R Turbo: (installed June 2006) new quarter mile times coming.. DataMaster predicts very low 14s near 100 MPH at 15 PSI Estimated 350 HP, 450 LB-FT torque Stock T25 Turbo: 14.7 @ 93 MPH at 11-12 PSI, turbo maxed out Estimated 280 HP, 350 LB-FT torque Factory 2-bolt stock "LG5" 3.1L 60* V6 motor, 206,000mi (May. 2009) Stock aluminum canted-valve cylinder heads

Modifications

Garrett GT2871R 53mm Turbo upgrade, .86 A/R turbine, 475 HP-capable GM LS1 beehive valve springs 28# Fuel Injectors (from stock Syclone application) Moates Ostrich real-time chip emulator, TunerPro chip tuning software (retuned by me for the 28# injectors) PLX M-300 Wideband O2 "Fully" performance built stock 4T60 overdrive transmission, stock 2000 RPM stall converter Aftermarket upgraded flex-joint Exhaust Crossover Pipe BoostValve manual boost controller