LTX and LSX Putting LT1s, LS1s, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects including repairs, swap info, and performance upgrades.

LT1 Fuel Mileage

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Old May 6, 2007 | 11:40 AM
  #1  
85streetmachine's Avatar
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Junior Member
 
Joined: Apr 2006
Posts: 90
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From: windsor, ontario
Car: 1985 iroc z
Engine: 6.0L coming
Transmission: 4L80E coming
Axle/Gears: 10 bolt 3.73
LT1 Fuel Mileage

recently purchased a LT1 with a t56. i'm going to have about 375 to 400 hp and was wondering what kind of mileage others are getting or what i should expect... i don't really get on it unless i'm at the track BTW...
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Old May 6, 2007 | 05:58 PM
  #2  
Klortho's Avatar
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Joined: May 2004
Posts: 2,924
Likes: 1
From: Kingston, Tn
Car: 1987 GTA
Engine: LT1
Transmission: T56
Axle/Gears: 9 bolt 3.70 posi
Re: LT1 Fuel Mileage

With 3.70 gears, I get around 24-26mpg on the highway, around 320-340 miles on a tank of gas.
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