Temperature Sensor Chips Opinions

[jfrabat]

Hey, guys, after looking around eBay for a while, I have found quite a few of these chips that plug into the system and allegedly increase HP to the engine. Anyone ever use one of these?

Check out all the hits I got from searching "Jeep+Wrangler+modelu+chip":

http://search.ebay.com/jeep-wrangler...e_W0QQfromZR40

I even found one with a chart from a Dyno (Race3Cube Power, http://cgi.ebay.com/ebaymotors/Jeep-...spagenameZWDVW) that seems to support it. I personally always thought that these were just a load of crap, but I am not so sure when looking at the dyno chart...

Anyone with any experience with these kind of chips? I am looking to get all the HP I can out ouf my 4 banger, but I just dont know if these are worth the $35 or so they run for (with shipping). Any comments?

Felipe