Im currently piecing together a turbo system and im wondering if my cars in decent state to handle boost, My current problem is my car revs 4000rpms with no power,5000rpms with no power, I dont feel any power being put to the ground. One of my room mates has a Jetta 2.0 and i know they have a lot of low end torque and its like 130 @ 2800rpms, and you really feel it, I mean you feel his car pulls. So i figure our cars are suppose to pull @ 4000rpm but mine doesnt.I've also noticed my cars runs alot better when its cooler outside than when its hot but my thermostat stays centered but I dont know. I was just wondering if any one has and advice or suggestions about whats going on or is my car just that slow. I have and udp,2,5 catback and air filter.

if it's really bad, i'd do a compression test... might be a head gasket going bad.

could be a slipping clutch.

I starting to think that its my headgasket, b/c i just had my clutch replace with a clutch from sachs,I noticed my coolant being really dirty 2weeks after adding new coolant, and the fact that i've can hear my coolant when i start my car up it sounds like its in the middle of the dashboard. but im going to do a compression test so i can have a better idea.

sounds like your head gasket is toast. dirty coolant is a bad sign, and the fact that you hear gurgaling from the heater core (underneath the glove box) may mean that you are loosing coolant in the engine and its burned off. of course, that sound can be normal, i hear it every now-and-then.