As stated before: My advice to you would be to: 1. find a Del Sol VTEC (that would be the one with the DOHC VTEC motor in it, and run 10-15 lbs of boost through it. It will easily out run a prelude, and look better doing it.

For turbo kits, look into GReddy, RevHard, DRAG, and FMax.

Next, and I mean IMMEDIATELY after, if not before, you will need to upgrade your fuel pump. My personal favorite is the Walbro 255 LPH. This will help in making sure you don't lean out your motor, and blow the whole thing up.

Then to help horsepower, and turbo spool time, go with a good exhaust. I would check out GReddy, Thermal, or run a custom 3 inch exhaust all the way back with any straight-thru muffler on it. The less convoluted you make the exhaust, the better, especially with turbo.

Now, depending on how much boost you want to run, you may need to start building your motor to take the added abuse.
For that, you will want to get stronger rods (built for turbo). There are several makers of these, such as Eagle, JUN, JG Edlebrock, and flatlander racing.

Then, to avoid detonation (the premature ignition of air/fuel in the combustion chamber due to excess heat or pressure), you may need to put some lower compression pistons in. Makers of these include: AEM, Flatlander Racing, and many others.

You may also want to buy a thicker, stronger head gasket, to keep from blowing the stock one. These are pretty cheap, and can be found all over the place. MR Gasket makes copper ones, that are guaranteed not to blow.

Next, we will move on to ignition. To ensure that you proper combustion, you will want to upgrade the stock honda ignition system. The company that I, and so many others recomend is MSD. thier SCI series ignitions are wonderful. WIth turbo, you will also want to find the "coldest" spark plugs that you can. cooler plugs will also help avoid detonation.

This should get you started... there are 102 million things that you can do to hondas, and above is only the tip of the ice burg. Injectors, a fuel pressure regulator, drop springs, better shocks, sway bars, an oil cooler, valve springs, cams etc... will all help make your car run better,faster, or more solid.

Also remember to install as many gauges as you can find... Air/Fuel, Oil Temp, Oil Pressure, Boost, and EGT (exhaust gas temp., also known as a pyrometer) as these will not only help in tuning your car, and getting the most out of your mods, but also let you know if anything is going wrong inside your engine.

Hope this helps, and good luck. If you do these, and do them correctly, you should easily have a Del Sol that will easily and safely run 12-13 second quarter mile passes.