Del SOl needs HEP ASAP!plsssss

I have my Del Sol and I don't know what to do.. its one of the sweetest Del Sols :) u can look at it and if you like if please try to help me :)
http://vankata1.tripod.com/imagelib/sitebuilder/misc/show_image.html?linkedwidth=actual&linkpath=http://vankata1.tripod.com/sitebuildercontent/sitebuilderpictures/delsol_van4o.jpg&target=tlx_new&title=posledni%20snimki..po4ti%20zavurshena
So i have the Del Sol S 94. i swaped a JDM b16A (170hp) i have the 6puck clutch,CAI,4-1 headers, full exhaust 2 1/4 inch, fuel regulator,shaved flywheel,17'' rims:(. and wet NOS 50shot. i got my head shaved 0.66mm and real good port and polish.
So i tested my car and goes 14.7 in 1/4 mile and 0-60 6.3
and thats without the nos and with the 17'' rims on it :(.I know 17 sucks but i race with them).oh well 14.7 was ok but here it coems the problem i test the car 5 more times and it gives me 14.9 and than 15.3 15.5 and now it's about 15.3 in 1/4 mile. AND THAT SUCKS i cant get any 14.8s no more?? i don't know why? the only thing i can think of is the fuel.i have the stock DEL SOL S fuel PUMP and stock del sol S injectors i just changed the stock fuel regulator with a real good one).
Can anyone tell me if the stock Fuel pump for Del SOl S (102hp) and stock injectors can handle 200hp coz my B16 is about 200hp whan i got the 14.7 time.
So i just don't get it why the del sol got so slow :) it should be in mid 14's all the time. So please give me some info about stock del Sol S fuel pump and injectors coz i cant find info on the net about the them! thanks