Thread: vx muffler hole
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Old 11-24-2011, 08:13 PM   #5 (permalink)
66sprint6
EcoModding Apprentice
 
Join Date: Nov 2011
Location: Middle TN
Posts: 111

WorkHorse - '88 Ford F150 XL
90 day: 13.5 mpg (US)

DailyBeater - '93 Ford Escort LX
Team Ford
90 day: 39.37 mpg (US)

The ST - '13 Ford Focus ST
90 day: 26.78 mpg (US)
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Yup, backpressure is good to a degree for a natural motor. You can open flow up a bit but getting rid of the backpressure entirely doesnt benefit u at all. Turbo setups are different, more flow and less pressure is best. I would like to free up some flow a bit on my escort but keep it quiet and not loose too much pressure.
Matt
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