Quote:
Originally Posted by neveucd
Ok I am pretty much understanding what goes on now from this thread. But looking at my numbers from a Uprev tune on a 7at w/ Injen CAI, FI CBE and HFC's I feel kind of jipped.  I also didn't get any of the special valet or anti theft maps. The tuner told me only one map was needed/loaded for my application, and a second would only be necessary if I wanted to run a different fuel. Help me to understand, is this about normal? I understand Mustang Dynoes read lower then the rest. So I'm probably making around 300rwhp?
Also thinking about getting short headers, so I would need to retune it again correct?
Vehicle: 2009 370z
Mods: Exhaust
EMS: UpRev
Base HP/TQ: 272/215
Final HP/TQ: 280/221
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Your gains are actually better than what a lot of people, including myself, have been seeing (probably because you don't have that many mods yet, so there's more to be gained from a tune). Whether or not you'll need a re-tune with short headers depends on what they do to your AFR (which is absent from the sheet above). Honestly, I doubt you'll need a re-tune just due to headers. What you want to do ideally is finish getting all your bolt-on mods first, and then do the tune. That way you only pay once. I'm not sure why you think you're making 300whp when your final HP number is 280. You're making 280, not 300. Now, I have no idea which exhaust you have. Depending on which one you have, 280 could be good or mediocre. Which one do you have?