Hello fellow enthusiasts! I have been having an issue with my car for as far back as I remember. I've owned it for almost 8 years, and it runs pretty well for the most part. Here's the deal: whenever I try to take off fast from a standstill, it seems to have very little torque at first; I can usually only break traction a little if I slam it on top of the painted line. Otherwise, it just slugs up to speed, gaining most of its acceleration around 4500 rpm. Other GTP owners here have no issue breaking traction, so I know it isn't just the 4600 ft altitude. So far, I have have replaced the PCM(Overkill), MAF, MAP, TPS, CPS, FPR,fuel filter, spark plugs(new 104s), and messed around with the boost bypass. I have also tried capping off the line to the boost control solenoid, and removing it to see if its bad. I've made no measurable progress.Again, compared to other 97-03 GTPs with similar bolt-ons, I'm slower in the 1/4 mile. 15.5 was my best on a stock tune and 3.4 pulley, it won't do that on the new tune so I run a modular 3.8. Any ideas as to what the real problem is are welcome. Thanks!