currently what was your speed when maintain at 3000rpm???dun be suprise if u not feel any different after changing the GB...i also change to 1.8 gb f5m222vrxe previously auto 1.6. not long ago two foremen drove my car and they said the same thing..."this is not 1.8 gb.it feel like 1.3/1.5"... the 2nd foremen recommend me to change the FD to gsr FD...he explain alot about gb even i cant understand after long time doing research with GOOGLE.. u need to ask an expert foremen in GB to get the right responsive GB ask u desire...
now on manual at 100km/h rpm 2.7kcurrently what was your speed when maintain at 3000rpm???
btw....1.6auto speed if 3000rpm was speed already around 130km/h... offcourse u cannot get the same speed with manual gearbox...