LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

383 Mpg?

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Old Nov 14, 2005 | 02:03 PM
  #1  
Deenasty's Avatar
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From: San Francisco
383 Mpg?

Hey guys with 383's and m6's, what kind of gas mileage are you guys seeing? My mods are in my sig, and im just starting my tune, and with a full tank, im getting about 160miles, should I be getting more?
Old Nov 14, 2005 | 03:42 PM
  #2  
Zigroid's Avatar
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Re: 383 Mpg?

I dont have a 6 speed but Ive gotten an average of 9ish. best tank was almost 13, worst was 6-7.

can pass just about anything on the road but a gas station
Old Nov 14, 2005 | 03:46 PM
  #3  
Dave '97 Z28 M6's Avatar
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From: S. Ontario, Canada
Re: 383 Mpg?

I just filled up today. I had gone ~360km (225mi) on about 42L (10.5gal). That works out to about 21mpg (all highway, and I don't drive it like it's a minivan).
Old Nov 14, 2005 | 03:54 PM
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Re: 383 Mpg?

Mine will do 19mpg for primarily highway and some city. Worst ever was 8mpg, but typical city is 15-16mpg.

EDIT: Note that I am running 4.33s

Last edited by TQdrivenws6; Nov 14, 2005 at 06:23 PM.
Old Nov 14, 2005 | 04:05 PM
  #5  
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Re: 383 Mpg?

thats pretty good, and what do we have 16 gallon tanks?
Old Nov 14, 2005 | 04:27 PM
  #6  
Dave '97 Z28 M6's Avatar
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From: S. Ontario, Canada
Re: 383 Mpg?

Owner's manual says 15.5gal (58.7L up here), but I've often seen it listed as 16gal (60L).
Old Nov 14, 2005 | 06:01 PM
  #7  
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Re: 383 Mpg?

I get about 12-13mpg around town and about 18-19 on the highway with my blown 385
Old Nov 14, 2005 | 06:11 PM
  #8  
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Re: 383 Mpg?

with the 42 lb injectors, my 383 was getting 21 mpg on highway, about 9 in town, about 14 with highway and in town.

I just installed 37 lb injectors, so im not sure what that will change to, haven't driven the car yet since im getting the tune changed around by ion for the 37 lb injectors.
Old Nov 14, 2005 | 06:24 PM
  #9  
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Re: 383 Mpg?

Originally Posted by zbomb5610
with the 42 lb injectors, my 383 was getting 21 mpg on highway, about 9 in town, about 14 with highway and in town.

I just installed 37 lb injectors, so im not sure what that will change to, haven't driven the car yet since im getting the tune changed around by ion for the 37 lb injectors.
Changing injectors shouldn't change mileage
Old Nov 14, 2005 | 07:17 PM
  #10  
Deenasty's Avatar
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Re: 383 Mpg?

I was just about to say that...
Old Nov 14, 2005 | 09:17 PM
  #11  
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Re: 383 Mpg?

Originally Posted by RCF925
Changing injectors shouldn't change mileage
well i wasn't sure if injectors made a difference or not, but either way i think im ok with the mileage im getting. Only in town sucks.

the 42 lb injectors had the car running a little rich, i figured going to 37 lb injectors and getting another tune might help out a bit since i heard it is easier to tune with 37 lb injectors, and ill hopefully be getting a dyno tune sometime in the near future.
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