A 308 GTSI quatrovalve will get approximately 14-15 mpg. By installing a supercharger such as a Nick Forza version, what would the gas mileage be after the installation ? 10 mpg? 8mpg? Does anyone on this site own a 308 gtsi with a supercharger already installed and running ? What kind of gas mileage is that person getting?
Mine was making just over 500hp and getting 17-18 on the highway. Around town is dependent mostly on how I drove, but 12-14 somewhere most of the time. The difference of course is that I had replaced the CIS with EFI.
This is the 3rd time he asks the same question: http://ferrarichat.com/forum/showthread.php?t=166965 If mileage is that important don't do it.
If all you are doing is adding a supercharger or turbo, then your mileage will be essentially dependant on how hard and how often you use the additional power. The same basic truth applies to going to larger displacement. If you go to a wilder cam, more or bigger carbs, then you are going to probably loose some driveability onthe low end for the gain in high Rs and there will be a mileage penalty for this type of work. hth, chris
Yes, but what if I add 66% more displacement and 11 more throttlebodies, but I remove the supercharger and promise to drive nice at least some of the time???
You are considering spending $10k on a supercharger kit, plus labor...and concerned about fuel mileage? You are not thinking this through.
If gas mileage is a concern, leave it stock, or buy a Prius. (they go 100mph, ask Al Gore's kid.) My 365+ hp supercharged 308QV gets about 12-14 mpg on the street (I drive in the power range, 3500-7000rpm) On the track I get about 8mpg, with a huge smile on my face...
