chips that add HP, good or bad? Options

[black13]

http://cgi.ebay.ca/HP-MOD-CHIP-CELICA-90-9...1QQcmdZViewItem

This is the stuff I'm talking about. I've got a stock ST and according to this it will add up anywhere from 20-40 hp to my car with simple instalation and me being the kind that can't blow anymore than $100 on this kind of stuff was wondering if they actually work? have somekind of gimmick or are they useless crap?

Worth it? If not then how can I add some HP to my stock car without busting out the big bucks?

oh and what about this gas saver?
http://cgi.ebay.ca/Toyota-Celica-GT-Gas-Sa...1QQcmdZViewItem

This post has been edited by black13: Jun 5, 2007 - 5:52 PM

[Valo666]

lol...the theory behind these things is that you install this "chip"..IE resistor, either on your air intake temp wire inline, or on your watertemp sensor. What this does is build up extra resistance in your wiring, then when the computer gets the signal, the computer reads it as theres not enough signal, so there fore your engine is running cool or your sucking in alot of cool air. There for your car can run a bit hotter, and some how that translates to more power. Im guessing because hotter engine, hotter engine bay, more complete combustion...but its all a pile of crap. Dont spend your money on this crap, only "chip" your gonna get that will do any power difference is pretty much any sort of AFC, even though thats not a "chip" but it piggy backs onto your computer and you can adjust your fuel curves accordingly and can squeeze out a few HP here and there.