I did a sct tune and lost hp. I got some post about my MAF, richer, leaner, crap. The bottom line is......just adding the tune or chip, your probably not going to see very little or if any hp or torque gains, or in my case I lost hp & torque.
To see a 30 hp gain is good but you are not going to see that kind of gain without some professional tuning.
I am taking my back next year with my sct tuner and get it back on the dyno.
I have 305 at the crank, which is about 260 at the rear (this is before my headers and exhaust). I pulled 249 rwhp, second pull was 254 rwhp. I pulled the sct tuner off the car, it pulled 260 rwhp.
Typically you are not going to see much with a tune. I read were people got a lot less that what sct advertises. Example, sct boast 15-20 hp, one guy only saw 7-8 on a 2000+ plus
stang.
Get a professional tune. Purchase the sct, take it to get it dynoed, they will watch your 02 readings and then adjust. It can get to be expensive.
Last but not least, do not load the sct, chip, etc. and drive around like you just "gained" hp & torque. You may just lowered your cars performance and not even known it. Also, do not go by the cars "tone" or "seat of you pants" this is crap. Go by what you dynoed!
Hopefully next year, I will be close to the 300 rwhp with the headers, exhaust!
good luck,
Rich