I have a 90 CRX with B16 pushing 150 whp, my buddies pushes 193 whp at 8 PSI on a T3/T4 turbo. I'm also using a Zex 75 Shot. On a hwy run in 3rd gear at around 70 MPH I jumped 1st and immediately @ WOT started spraying, the Civic SI stayed beside me for about a few seconds. Ran till fuel cut-off at 112, he was about 1/2 car behind me. My bottle was near empty and was it was cool that day so Nitrous pressure wasn't all the way up.