I was curious to know, since I bought this car to be both a blast to drive, and be economical, what kind of gas mileage people are getting after a Trifecta tune. I realize it's going to be hard to keep my foot out of the floor with that much power, but if you drive or have drove a few tanks of gas conservatively, what kind of mpg are you getting now that you have gotten the tune done?

 

My avg mpg has increased to 30.4 the last week with the winter blend of gas going away. I don't think the tune hurt anything.

I calculated the last tank at a hare under 30 mpg. The display has been about .5 mpg high since I got the car. My commute is 40 miles each way, mostly interstate.

I hammer it around once a day somewhere. Second gear tire spin at 55 - 70 mph is a blast when the boost builds to 22 lbs.

First gear is tire smoke on command.

 

I have heard reports from people with tunes that it has gone up. 30 mpg seems to be a fairly easy number to achieve as long as you dont get on the gas too heavy.

Our cars must be running a bit rich stock. The leaning out of the A/F ratios in these tunes must be the improving factor.

 

My gas mileage has SUCKED since I got the tune...100% due to my inability to keep my foot off the ground, lol, I'm gonna need new tires so soon... On the occasions when I can actually keep it in check it seems no worse than stock.

 

^^^^hA same here,other wise about 26.5mpg avg mostly city driving , but just a while ago did about 4 runs and it drank 1/8 of a tank!!!

 

With the tunes the A/F is richened quite a bit, but mainly in PE mode at WOT. Part throttle is usually unaffected. I have a street (part throttle) tune on my car and if I cruise at 55 I get 43 mpg. Average is 32 mpg mix city and hwy. I do not have the trifecta tune BTW.

 

what tune do you have? I've been contemplating getting one....any clue how much these tunes cost on average?

 

I have a custom dyno (full throttle) and street tune (part throttle) from Precision Motorsports in Florida. 8 hours worth of tuning on my car to get it where it is today.

 

Overall mine is about the same. A little more extreme in each direction though. Meaning if I am heavy on the throttle it seems to suck more than it would before for obvious reasons. (most boost = more fuel)

This may apply to stock also but I found it makes a HUGE difference to cruise 70 vs. 80 for example. I started driving 65-70 to work on the highway instead of 80mph and I get MUCH better gas mileage. If the road is pretty flat, not much wind or anything, I can see high 30's and even 40's. Most of the time though between 28 and 32 which if you average that is 30 like the EPA rating.