MustangWorks.com : Ford Forums - View Single Post - What's the secret to retaining good gas mileage in a performance application?

Vector · 05-12-2005, 01:27 AM

I KNOW there are motors out there delivering 400 horsepower, and still get 20mpg on the highway. What is the secret to retaining such great driveability in a motor like that? Is it keeping the compression ratio stock? I know EFI has a lot to do with it. But I'm not really sure of the specifics. Do emissions equipment have anything to do with gas mileage?

The oxygen sensor in the exhaust probably has a lot to do with it, am I right? I want to get full-length headers, and I've heard that using those will not work very well with the o2 sensor. Would this seriously affect my gas mileage?

05-12-2005, 01:27 AM	#1
Vector Registered Member Join Date: Jul 2001 Location: Comox, BC, Canada Posts: 119	What's the secret to retaining good gas mileage in a performance application? I KNOW there are motors out there delivering 400 horsepower, and still get 20mpg on the highway. What is the secret to retaining such great driveability in a motor like that? Is it keeping the compression ratio stock? I know EFI has a lot to do with it. But I'm not really sure of the specifics. Do emissions equipment have anything to do with gas mileage? The oxygen sensor in the exhaust probably has a lot to do with it, am I right? I want to get full-length headers, and I've heard that using those will not work very well with the o2 sensor. Would this seriously affect my gas mileage?