my_99Z

iTrader: (4)

Just a question but how much is fuel mileage affected with a cam swap? I'm looking at putting possibly a 224 or 228 cam in my DD, it's a 99 ls1 and an m6 right now with my current setup I have long tube headers, or-y, slp ram air box, and a lid. I get about 23-24 mpg with probably 70% highway and 30% city driving. I have yet to get a tune done, my main question is will I see a decrease/increase or relatively the same fuel mileage if I were do put one of the above mentioned cams in?

1_MEANZ28

iTrader: (4)

Not much considering u have a m6 .if u had an a4 the mpg would suffer more due to the stall ..those cams are great and aren't considered big cams

my_99Z

iTrader: (4)

How much would I be looking at suffering? Would a tune do anything for it?

my_99Z

iTrader: (4)

Only reason I'm asking is cuz it's my DD right now, looking at putting something to give me more power but also not murder my good fuel mileage as I drive around about 300 miles a week right now with school and work.

Sales2@Texas-speed

iTrader: (5)

With a 6 speed transmission, and a good tune, if you can keep your foot out of the pedal and cruise it, you should be within 1-2mpg of what you had cruising before the cam swap. Now of course when you're making more power, you're using more fuel!

farmington

iTrader: (14)

when I went to a 224r my city milage went from 19 to 17 but I'm probably in the throttle more now. Its probably not even worrying about. BTW I have an A4 with a 2800 converter and 3.73 gears.