im runnin about 20 psi and i changed out the mass thinkn it was takin power away cuz when i bought it i was told it was calib to 24 lb injectors but a friend doesnt think so so i went back to stock and noticed a lil gain and i insatlled a nos kit sun a 150 wet plate and i hit it out the hole and still the same problem i know it makes good torque with the 150 shot unless i have like 50 ftlbs of torque ion the motor alone which i doubt ill try raising the tire psi also a friend has a 90 hatchlx with same setup and he can launch at 4500 and he spins on nitto dr if he sides step the clutch but he also hooks