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Old 06-15-2019, 10:22 AM   #1
Greenhornet2
 
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Fuel mileage

So, i now have about 200 miles on the supercharger install. I took it out today for a nice long leisurely drive. About 80 miles. Mostly 45-60 mph roads some hills, nothing major. About 10 miles highway and about 15 minutes city. When i left the house i was at 26.5 mpg. Last night i took a buddy for a ride and had done a few short pulls 2nd and 3rd. Today i only wot a few times and very briefly. By the time i got home i was at 32.8 mpg.... seriously... i'm blown away.
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Old 06-15-2019, 10:54 AM   #2
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I'm reading between the lines here...
Your tuner "might" have overlooked scaling the one table for your new fuel injectors. I had done this to my own car and it was getting like 40+ MPG, which I knew wasn't right.
Try the old method -- fill up, record mileage, drive, fill up again and then calculate Miles/gallons (MPG)
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Old 06-15-2019, 01:51 PM   #3
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Quote:
Originally Posted by granatl View Post
I'm reading between the lines here...
Your tuner "might" have overlooked scaling the one table for your new fuel injectors. I had done this to my own car and it was getting like 40+ MPG, which I knew wasn't right.
Try the old method -- fill up, record mileage, drive, fill up again and then calculate Miles/gallons (MPG)
Yes, i will. But i went 80 miles and used 1/4 tank so it doesn't seem horribly off.
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Old 06-15-2019, 01:59 PM   #4
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Originally Posted by Greenhornet2 View Post
Yes, i will. But i went 80 miles and used 1/4 tank so it doesn't seem horribly off.
80 miles and 4.5 gallons = 17.777 MPG.
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Old 06-15-2019, 03:18 PM   #5
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We will see. I'll fill it soon and get the true number
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Old 06-15-2019, 05:37 PM   #6
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Like said you can't believe what you see on that until quite a distance. If I reset mine on the highway it says 41mpg for a long time. lol
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Old 06-15-2019, 05:39 PM   #7
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You are not getting 32 MPG. My non-supercharged LS3 is lucky to get 23.
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Old 06-15-2019, 05:51 PM   #8
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80 miles and 4.5 gallons = 17.777 MPG.



This
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Old 06-15-2019, 10:49 PM   #9
weSS1LEy
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I think mine is getting just enough mpg to get from one gas station to the next lol
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Old 06-16-2019, 01:51 AM   #10
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Something's off imo but if I'm wrong, I'm getting what you have!
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Old 06-16-2019, 03:37 AM   #11
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No way are you getting 32 mpg as an average.
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Old 06-16-2019, 06:38 AM   #12
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Originally Posted by Iron Lung Jimmy View Post
You are not getting 32 MPG. My non-supercharged LS3 is lucky to get 23.
23 - 25 Max is what an SS gets on the interstates driving normal, Thats it !
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Old 06-16-2019, 11:52 AM   #13
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Yea, think my computer is way off lol. I dunno why i was thinking the tank was 12 gallons. I got excited, wishful thinking lol. I think it's getting about the same as before the charger though which isn't bad. Haven't driven it enough to do the real math yet. I have a different pulley to put on still and a dynotune
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Old 06-16-2019, 12:28 PM   #14
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I get 24 mpg on a trip using 6th gear mostly with my setup below. Driving locally I get about 20 mpg. My 2017 Silverado locally gets 20 mpg with the 5.3 liter V8.
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