I'm not sure of your situation but I have a auto B16A ECU & my vtec kicks in at 4500 .Remember you have 2 parts to your Vtec.I can't think of the site but B16A1 should kick in at around 4500 because my friends 97 GSR Vtec kicks in at 4400.OH, one site you can check out is WWW.JDMCARS.COM & WWW.JSPEC.COM. 4500 is when your Vtec w/no chipped ECU should engage.Even the Integra Type R doesn't kick in that high.Good Luck