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Old 03-18-2008, 10:04 PM
andy2175m4 andy2175m4 is offline
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Default gas mileage and 390 T-Birds ??

Hello all,

I have a 1963 Landau with a 390, that was running an edelbrock 4 bbl carb, when I bought it a year ago. The gas milage was about 6 - 8 MPG in city traffic, but was 22+ mpg on the freeway.

Due to this terrible city gas milage, I installed a Holley throttle body 650 cfm 4 bbl injection system, which does a little bit better on gas, but I have not actually measured it yet.

What are the experiences of anyone else out there that has tried to track and improve the MPG of the 390....my 63 thunderbird is my commute car, and I drive it often...(chicks dig it !)

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