I have an 89 formula 350 firebird. When i got it, I would get around 120 miles before my
next fill up. Then when i cracked my valves we machined the heads and i got alittle more Then I put high flow cats, a flowmaster, filter chargerand accel plugs/wires/ &supercoil. I now have around 140-150 to the tank. But what is up with the bad gas mileage?? It seems like the more power I get the better the gas mileage gets but it just slowely grows.

Well I just figured mine yesterday, 143 miles on 12.5 gallons.


thats a stock LG4, I wonder if something is amiss with my carb ?

nah,....!

thats stop and go, heavy footed driving too.
about as bad as I could make it.



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60 Ranchero - Project ( Money Hole )
85 Sport Coupe LG4 - Daily Driver

Just another Hot Rod kid, or thats what they all tell me.
Livin' the Stereotype

So do you think that my gas mileage could be improved without losing hp??