69LeMans69
New member
i was wondering if any one can tell me what the mpg are with my 69 400 with the 400 trans it has an after market carb and intake.
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69 400 mpg?
- Thread starter 69LeMans69
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thats something you have to figure out. Fill the car, write down the mileage on the odometer. Drive it till it's below 1/2 tank, fill the car, compare the new mileage to the old mileage and take that number and divide it by the number of gallons the second fill took.
69LeMans69
New member
okay thanks im planing on taking it on a 1000 mile road trip just trying to figure out how much it will cost me.
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whats' the rear end ratio? what size tires? what cam shaft? what size carb? which intake, lots of factors involved, a pure ball park figure 15 mpg
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69LeMans69
New member
2.56 rear end with 235 60 R15 tires edelbrock 650 carb rpm performer intake stock cam. dis has been upgraded to hei.
69LeMans69
New member
okay thank you for the guess it gives me a starting point to work off of.