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Old 03-16-2010, 04:45 PM   #4
Keep it clean
aggieE46's Avatar
Join Date: Aug 2006
Location: Royse City
Posts: 8,066
My Ride: 03 Evo, 07 Passat
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If you're going to be using cruise control, any mod is great. When you increase volumetric efficiency, you'll increase gas mileage... as long as you're not on the throttle. I still get around 30mpg with headers, cams, 3.46, but only when I don't touch the gas and cruise at around 70.

Originally Posted by tylerc View Post
I have an 04 zhp 330. I have searched and couldn't find any dyno charts from you guys before and after with under-drive pulleys. Also I didn't see any mention of mpg after install. I have gotten a new job where i put a LOT of miles on my car and can justify a performance mod to the better half if the mpg are there.

Anyone have some info/charts for me?
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