what kind of car! The 93 maybe? If it is efi you can order a canned tune and install it for the bigger injectors. sounds like the air to fuel is off, and more than likely needs timing added.thats the sluggishness.
2004 pontiac gto m12 6sp,polished t/b,160*t/s,pacesetter longtubes,3 1/2"custom single exhaust, t/b bypass,ls7 clutch package, k&n cai, torquer 2 highlift cam 238/248@50-600/605-112lsa,stock #'s 309rwhp,344rwtq, after mods 399.48rwhp,389.52rwtq. 12.70@109 on burned up stock clutch, new mods---ls7 clutch package, new one off paint job,rksport full ram air hood... going to forge the engine and procharge in the near future.