TURBOMANGT, I did no engine mods to our PT. It's my wife's daily driver and I just upgraded the exterior and made the interior more comfortable and pleasing to look at. My opinions in this forum are based on 28 years as a professional mechanic and playing at home in the garage. Chrysler designed the Turbo as a complete system. Opening up the intake will give you a little more top end and a lot more noise. Noise is good when you're young, I miss the stock sound of a 440 sixpack. The only reason Chrysler limited the intake was to reduce turbo whine out the air cleaner. Changing the exhaust will effect the power curve. Headers and duals reduce back pressure thus raising the RPM for horsepower and raising and NARROWING the torque band. Chrysler chose to set back pressure for a maxium power range for daily commuting. Changing the muffler will help the exhaust "talk" more but not really effect back pressure because the stock muffler ain't tiny! Compare it physically to anything you replace it with. I got kind of long here but you're not getting much more out of the engine other than some music, but music ain't bad! As long as I'm rattling, I'll be unfriendly and say anyone who tries to NOX a turbo is a complete idiot. It's already making almost 1.5 hp per cubic inch, forcing much more out is kissing 7/70 good bye. Be happy with it! If we could have had a factory 700hp 440 with 7/70, a lot more of us would be dead now.
Edited by - 2sb on 01/23/2003 11:46:18