Re: [Amc-list] squeeks and rattles

[Tom Jennings <tomj@xxxxxxx>]

> Drove the car to Spencer Iowa and back a week ago yesterday. About a 114
> miles on the odometer, used 9 gallons of gas, that's 12.66 mpg. That sucks!

Single fillups aren't always that accurate; youre better off going two
or three fillups, just take the first odo reading and the last, add up
all the gallons, divide.


> Remember it's a stock 304 with the Fomoco 2 bbl, 2.87 gears, G60-14 tires
> and T-5 manual with .63 overdrive. I wonder if running in 4th gear instead of 5th would be
> better. Gotta get a tachometer so I know what rpm its running at 70 mph.

I think G60-14 is 25.8", if so, here's a chart for you. OD= 0.63,
3rd=1.00.



          3rd
         3rd OD
          RPM
          MPH
          MPH
                     500
                    13.4
                    21.3
                     650
                    17.4
                    27.6
                     800
                    21.4
                    34.0
                     950
                    25.5
                    40.4
                    1100
                    29.5
                    46.8
                    1250
                    33.5
                    53.2
                    1400
                    37.5
                    59.5
                    1550
                    41.5
                    65.9
                    1700
                    45.6
                    72.3
                    1850
                    49.6
                    78.7
                    2000
                    53.6
                    85.1
                    2150
                    57.6
                    91.4
                    2300
                    61.6
                    97.8
                    2450
                    65.7
                   104.2
                    2600
                    69.7
                   110.6
                    2750
                    73.7
                   117.0
                    2900
                    77.7
                   123.3
                    3050
                    81.7
                   129.7
                    3200
                    85.7
                   136.1

Frank sez:

> I'm willing to bet you WILL get better mileage running in fourth with
> a 2.87 rear axle! When in OD it's as if you had a 2.64 rear axle --
> way to high! 

Yeah, that's waay too much axle and gears outside of the salt flats...




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