[tbplus10]

does anyone kno where to get or kno about a supercharger for a chevy colorado?? ive heard a little bit about them but havent been able to actually find one

Whipple and Vortech both had Superchargers in design and testing for the Colorado prior to the vehicles public debue, and they both had preproduction Superchargers at SEMA, I havent heard of them releasing any for sale yet.
Google their names for the websites and check'em out.

Superchargers sound nice, and the spool and air release of a Turbo is cool, but with todays fuel prices I'd think twice before putting one on my daily driver.

Superchargers and Turbo's require Premium fuel (octane additive in a bottle doesnt cut it). I have a Supercharger on my Tacoma (3.4ltr) and my Ski Boat (GM marine 383 stroker) and a Turbo on my 91 Toyota pickup (22R Stroker) and none of them get good mileage (even when I keep my foot off the floor). I get better mileage on my B/B Suburban than I do on the Tacoma and the Toyota pickup. I'm planning on removing the Supercharger from the Tacoma in the next few weeks so it'll be economical to drive to work again (it's getting to cold to keep riding a motorcycle to work).
Aftermarket Superchargers seem to require more maintenance to keep running good. If your going for peak perfomance you'll need to tune the engine about every 15K, tuneing requires a Dyno and a computer capable of fuel mapping, it takes about 3-4 pulls on the Dyno and about 3 hours labor.

 

[tbplus10]

tbplus10, what else did you do when you added the turbo to the toyota? My GTI gets 30 MPG turboed, and the guys I know that have turboed VR6's have gone up on mileage rather than down from the N/A days. Generally, it will require the premium fuel, but the only time it uses more fuel is in the high RPM range where the turbo is really blowing. Basically, with the way the engines run, at least in VW's, if you drive the same way as before, your mileage will actually improve when turboed.

Having said all this, on a big V8, I would go supercharger over turbo, because of better low-end effeciancy, and you don't notice the parasitic loss as much as you would on my mighty 1.8L.

An additional injector in the manifold piping, larger primary injectors, Walbro high flow fuel pump, Walbro fuel regulator, and the Turbo/Ignition Management Computer has had the fuel map programmed for a high flow rate. Toyota engines have a lean fuel problem that leads to head failure when running any type of forced induction and they require a high fuel flow.(I replaced 2 heads in less than 6k miles before I modified the fuel system, this heads been on for 13k).