alright, i got rid of my 93 hatch for a 90si with a b18a1 swap...the idle is set good and i have adjusted it myself and am happy with it...yeah yeah, so i notice when its warming up the idle bounces up and down between about 1,000 and 1,500 kind of back and forth at a steady pace and im not sure what it is...also i notice when i take off (not full throttle) as if i were just giving it a little throttle nothing extreme it kind of studders between 1,000rpm to around 3,000 then mid range in the power band it picks up pretty good, note i maintain steady throttle...it may be a fuel filter or something like that, im not real sure just maybe a fuel problem would be my guess, any information would be helpful...thanks

my motor set up currently is:
b18a1 power plant
dc headers
ram air intake
stage 2 centerforce clutch
stock exhaust currently

 

I dont know about the studdering, but I have a 92 integra and it does the same thing when it is warming up. I believe it is normal.