I challenge you to find me more then 5 dynos that PEAK at 3600rpm, NA or TT. I was only able to find one. Infact, Guapo mentioned I look at 1996 Z's, as they do not have the Variable Timing configuration, and even then, the MAJORITY of Z's in Stage Stock to Stage 3 peaked at 4500 to 4800 rpm. The Turbo Car dynos peaked even higher.