LT1 swappers, how do they affect fuel mileage?
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Supreme Member

Joined: Jan 2003
Posts: 2,043
Likes: 3
From: San Diego
Car: 1994 Trans Am
Engine: LT1
Transmission: Auto
Axle/Gears: 3.23
LT1 swappers, how do they affect fuel mileage?
Just wondering. I know you have more power and want to use it, but when yout not showboating, how is the mileage? I would assume the same, but you never know.
Thanks.
Thanks.
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iTrader: (1)
Joined: Jun 2002
Posts: 2,259
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From: Woodstock, GA
Car: 1987 Trans Am
I used to get 26mpg in my 97SS, and it had a healthy cam, ported heads, and 4.10 gears (M6). With a similar combo in a third gen, you should be able to get that or a little better (lighter). An auto will get a little less, unless you have really high gears in the rearend (2.73s or 3.08s).
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