Looking for any diy mods for Intake, upper intake, or engine that will make it a tad bit faster or sound better. I know it may be pointless to you but I enjoy tinkering with fieros. Also maybe a mod for the engine looks and any stylish ideas. Thanks I appreciate it
If you have an air compressor that has enough 'oomph' to continuously power a die grinder then the single best thing I can suggest is to gasket match your intake and exhaust following a good port and polish. Its good if you like tinkering and have ALOT of spare time as its time consuming but the gains are considerable if you take your time and do a good job. Also it won't affect reliability like some other engine mods because your not really changing anything, but rather enhancing what's already there. I use a variety of long and short metal rasps and grinding stones, I know that eastwood.com will have everything you need for porting and polishing but I would assume you should be able to get most that stuff locally, also I'm certain there's threads on it. It will free up some power to by letting the air in and out of the engine more efficiently, I'm not talking like 30hp or anything but I'd say you could maybe squeeze out 10hp will a really good job. Its cheap in money but expensive in time, worth it though imo.
take and disassemble your 2.8 intake and heres the good part!! Duct tape it to the bigger motor swap you should be doing in the first place..............I prefer cheetah print duct tape, heard it gets 5-7 hp increase using it. lol
Your question is incredibly ambiguous. You could ask a dozen people what their idea of a "beefier" sound is and you'd get 12 different answers.
Most all you're going to get out of messing with the stock L44 2.8L V6 is some sound changes. You're not going to get any serious power upgrades. There's a reason why so many swap engines in their Fieros.
If you must pursue it though;
The exhaust side is usually a good place to start. The exhaust on the 2.8L V6 was setup primarily just to work for it's basic purpose, not really to do anything amazing. Porting the exhaust manifolds helps a little bit. When you remove them, you can look into the primaries and clearly see material obstructing the path than can be removed. I did this, and it helped a tad bit with sound, in addition to increasing exhaust flow a bit (but any power gain is debatable).
You can't do much else with whats there, other than running custom piping, removing the catalytic converter, or running a different muffler.
The stock upper intake plenum is incredibly restrictive immediately following the throttle body. All you have to do is look at it to see this. It reduces in size in some places as much as 15mm smaller in diameter than the throttle body opening. This really hurts incoming air. Some people have removed the intake, cut the restrictive part off, and welded a more rounded piece on the underside to "open" it up. It can help since it keeps the incoming airflow consistent. However the provisions for the EGR tube are located in the most restrictive part, meaning if you do this mod you have to account for where to relocate the EGR (fairly easy) or remove the EGR (not so easy, and you may have to make sure you can do it in your state for emissions).
Even doing this modification, there is still the very sharp turns the air has to follow to travel into the lower part of the upper intake. These can't be modified easily.
The "silencer" located in the lower quarter panel area restricts the noise from the intake. It's located directly behind the side air intake. You can jack up the car, and look underneath the car in this area and see it. I usually remove the fender liner in this part to access it. You can remove the entire "silencer" box and place a straight pipe in there. I've done that, and it creates a whistle sound upon de-acceleration. It doesn't help add power, but if you want an intake sound there you go. Of note, the "silencer" box also acts as a water separator, meaning if you do remove it you remove that function of the setup.
You can look into installing hard pipes for the rubber intake (often called a cold air intake or CAI). However, you have to make sure you retain the provisions for the PCV setup on it. Another issue to consider is the air filter box has an incoming air temperature sensor that has to be retained.