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BigV8
03-01-2009, 06:16 AM
I know that you should'nt be concerned about fuel mileage when your going for HP but when fuel prices get back up again just like to know a ball park MPG from those that have a maggie 1900 . thanks
99-LS1-SS
03-01-2009, 06:17 AM
I think that it doesn't change or it might even get better. I could be wrong though.
norm8332
03-01-2009, 06:38 AM
I was told +1 MPG on a stock car, most likely no change on a car with a CAI. I think it's because even when bypassed (normal driving) the air still passes through the intercooler.
DRAPER
03-01-2009, 09:55 AM
i was avg 18-19 mpg before the maggie now im getting 22mpg after the past 2000 miles
i have magnaflow exhuast and rotofab and im putting 440 to the wheels i couldnt be happier
BigV8
03-01-2009, 12:33 PM
Great, thanks for the replies. Time to work some extra hours for that maggie!
norm8332
03-26-2009, 05:30 PM
Post maggie I've picked up +4 MPG. And thats with a heavy foot. I'm at 19.6 MPG.
GRRRR8
03-26-2009, 05:35 PM
Post maggie I've picked up +4 MPG. And thats with a heavy foot. I'm at 19.6 MPG.

I saw your video, thats a REAL heavy foot!! :)
norm8332
03-26-2009, 06:35 PM
Now I just need some traction...
MtbDoc
03-27-2009, 04:07 AM
Using the tune provided by MagnaCharger you won't see ANY improvement in mileage. After discussing it with their tuner, he specifically said that they didn't change the base tables for part-throttle and the like. It is only the high flow (= boost) conditions that they developed their tune for.

The folks with dyno tunes apparently have had a good bit more work done on the tune. This is one of my concerns with the base tune (and that it is for 91 octane which isn't what most of us need).
BW G8GT
03-27-2009, 08:23 AM
How does the transmission handle the extra torque and power produced by the Magnacharger?