Gas & catback
TECH Enthusiast
Joined: May 2005
Posts: 555
Likes: 0
From: Blairsville, GA
Any mod that frees up exhaust flow, creates a more complete burn, or reduces friction will increase the efficiency of any engine, as well as make more power when you hammer down.
It's when you add bigger TBs, wild heads, and wild cams... that's when your gas mileage start to suffer. Granted, WOT efficiency is much better than stock(OR else it'd be pointless to do such mods and go race), but part-throttle efficiency suffers because big-power engines are tuned for just that - big power. And to make big power you have to burn a lot of gas.
Good grief! Where'd all that come from???
It's when you add bigger TBs, wild heads, and wild cams... that's when your gas mileage start to suffer. Granted, WOT efficiency is much better than stock(OR else it'd be pointless to do such mods and go race), but part-throttle efficiency suffers because big-power engines are tuned for just that - big power. And to make big power you have to burn a lot of gas.
Good grief! Where'd all that come from???
Joined: Nov 2001
Posts: 34,659
Likes: 2,588
From: Schiller Park, ILL Member: #317
Originally Posted by WILWAXU
If nothing else.. it could improve it a little.
If you drive the same it will, as they said, stay the same or improve. 
