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Old 01-24-2013, 08:28 PM   #7
POC
Scooby Newbie
 
Member#: 344560
Join Date: Jan 2013
Location: Indiana
Vehicle:
2007 Impreza
Silver

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Quote:
Originally Posted by RaceFaceXC View Post
After good EL headers, hfc, hybrid intake and a tune for max tq I found an improvement of about 4 mpg in city. Highway mileage improved less. I netted about 30 hp/tq and a bunch of area under the curve, though. The down side is that headers to allow timing as advanced as I run are close to $1k . On the up side, a tune for max tq is usually your best bet for max efficiency, too.
I find this interesting. Most of my driving is in the "country", I'm not sure exactly where that falls, closer to city would be my guess. Not much idling at lights but lots of slowing down for hills and curves and getting in the gas after the curves and hills.
Could you tell a little more about what you did?
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