I believe old school rustang 5.0's had 4 cats but that was running a true dual exhaust so 2 on each side. 3 cats is overkill I'm sure you'd pass emmisions with just 1.bedabi said:Yes, the engineers knew what they were doing, but they also knew they had to intentionally put in some restrictions to make the WRX a low emissions vehicle. I mean, what other car do you know has three cats!
Holy cow! I am running 16.5 PSI on a PE1818F and big injectors and don't get that bad a mileage. You must really push the car hard on an everyday basis.nuthinspecial said:The biggest problem you have is keeping your foot out of it. My gas mileage dropped to about 15.5 mpg (back and forth to work) as a result of this upgrade.
Holy cow! I am running 16.5 PSI on a PE1818F and big injectors and don't get that bad a mileage. You must really push the car hard on an everyday basis.
hmmm....im getting 18mpg all the time, but i also have a fairly heavy right foot. i know unichip can help with mpg sometimes, but does an mbc do anything?
I have everything stock and the last refill i got 18 mpg but i'm good this week i am getting about 20-21mpg