So,I went out and bought a hypertech tuning computer for my 96 lt1. For 400 bucks, im not impressed. I noticed a difference in the way it ran at an idle(smoother), but when i go wide openthrottle there is little to no noticable difference. When i changed out spark plugs to NGK plat's inoticed a difference, and they were only 40 bucks.
Not a recomended purchase if you ask me, oh and also, the guys at o'reilys misrepreseted this as being able to clear "check engine" codes, etc. I read the whole instruction manual and i can't find or figure out how/where it does that. The only good thing i have to say about it is, you can program car after car because it saves over your computer. So if anybody in the Des Moines area wants to feel 7 whole horsepower... Let me know maybe we can meet up and i could help your camaro/firebird be a little faster.

Anybody used one of these plug and play devices and had success?

 

maybe you should have done some research first, the consensus is that they are worthless

 

More like fact to me.....all I've read about them is to be CARB or EPA legal they cannot change anything below WOT and what they do change at WOT ie leaning-out the mix and playing with the timing. Now if they go too lean and don't retard the ignition enough looks to me like you would hole a piston due to a too lean condition.

I would never run one. I still believe if you want more power you'll need to do it the old way.

 

i called hypertech and they don't even make one for my car. 97 ss convertible