Yes its proven i have data logs to show the difference and believe me its huge.

No your having your engine flow more exhaust out and if you have any intake mods your having more air entering and exiting the motor you need to compensate by adding more fuel.

As i said before theres a HUGE difference in the AFRs. The VQs from factory come lean to meet emissions and better gas mileage, now on top of that being you increased air flow through the motor, you MUST compensate by adding more fuel to achieve the correct air fuel ratio. My AFRs pre-tune were averaging mid 14s at WOT which is very lean, after the tune i got em right around 13.1. Now i have pretty much all the bolt ons you can get besides an Mrev2 so my motor had a major increase in air flow after the add ons. Trust me, i was in the same boat you were, wondering would a tune really make that big of a difference? Im here to tell you yes, its night and day difference.

Let me know if youd like me to screen cap my data logs i think i still have the very first one i made before i tuned it and im pretty sure i still have my final one.

 

hmmm.. what ECU are you running? and who tuned your car?

so if i were to run art pipes and get a tune i would in doubt get worse mpg? shiet..lol

 

LOL yea probably i never had good gas mileage to begin with i have a heavy foot. On a side note i got Osiris tuner from a dealer and they sent me a base map and ive worked off of it from there. The base map was not far but still a little lean in some areas.Also with Osiris and most other tuning solutions its all based off engine load, so basically at WOT you want more fuel and at idle and cruising you can afford to actually run leaner just not too lean. So if your NOT like me and you cruise most of the time you may be able to actually increase your gas mileage depending on how its tuned. I usually average about 200 miles a tank (city driving so lots of stop and go and hard accelerations) before the tune now its a little less cause my driving hasnt changed and my car is using more fuel and making more power.

 

ohhh ok i see! this makes me want to get a tune now!! ahhhh damnit, lol

 

Just removing the electronic throttle restriction alone makes an uprev reflash worthwhile, seriously I'd give a satisfied or your money back guarantee on uprev I'm such a believer.

Not to mention fixing the A/F ratio, deleting codes,. Rev & speed limiters, etc

 

Lol... There is a bunch of thread on these ART Pipes.. Why start a new one?

 

^^ your post is a little too late..