i have a 97 ek hatch with a b16a2. obd2-obd1 jumper with an obd1 p72 ecu. vtec comes in at 4800rpm. isnt really making any power in vtec. i beleive vtec on the 99-00 civic si comes in at 5500 rpm. is this why im not making much power in vtec? anyone have any ideas? will i make a significant difference in power if vtec comes in higher than 5500rpm? never had this problem before.