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Shade Tree Mechanic
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The average gas mileage on my 1952 Styleline Deluxe Four-Door Sedan with a Powerglide transmission is 14.4 for the 1,200 miles since acquiring the car in September 20l6. my driving is within 30 miles of home with a number of stops and starts. Would this be considered normal for a Powerglide equipped car driven locally?
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It is a little on the low side. Starting an engine frequently and evaporation can raise heck with the mileage. On trips my 1950 P.G avarages between 17 to 18 MPG driving around 65 MPH. Thats trips of several hundred miles of steady interstate driving.
Gene Schneider
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It's very close to what I get with my 54 with a powergluide, got 17 on a long trip last fall.
Dens Chevys 1927 Speedster 1928 coupe 1941street rod 1947Fleetline 4 door 1949 1/2 ton Pickup (sold) 1954 210 4 door 1972 Monte Carlo 2003 Corvette convt..
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Would this be considered normal for a Powerglide equipped car driven locally? I wouldn't expect much more than that for stop & go type driving depending on how light your foot is when starting out. Dick
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I averaged 17+ MPG with my 1957 Nomad 4 BBL power pac Power Glide for the 900 mile trip to DesMoines and back. There was a very stiff head wind going, slight cross wind returning. Driving around 65 MPG. That is what I would have averaged with my '50 PG. under those conditions.
Gene Schneider
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Big difference between steady highway driving vs a lot of stop & go which is what I understood was most of his driving. I would think if he ran a tank full on the highway at a steady speed he would get around the 17 number also. Just my opinion>
dick
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I agree. For an accurate test you need about 3 succussive fill-ups in a short period of time.
Gene Schneider
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Shade Tree Mechanic
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Shade Tree Mechanic
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The 14.4 MPG I have averaged for 1,000 miles since purchasing the car has been local stop and go driving within a 30 mile radius. On a trip at 60MPH I should get 17 to 18 MPG. Thanks to all of you who responded to my Chat.
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Highway MPG of 17-18 with a early 50's automatic would require the engine to be in top condition, Good rings, good valves, good carb adjusted properly, correct timing, etc. I would not be obsessed with MPG with all the more miles you are racking up. Can't be costing a lot more to drive, so enjoy the ride. Just my opinion !!
Dick
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I agree with Dick... Measure it out in Smiles per Gallon. You'll find it goes a lot further!
Those accustomed to the finest...find it in Chevrolet. 1953 Belair Convertible 1951 2dr Deluxe Sedan 2015 GMC SLE 4X4
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Backyard Mechanic
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Backyard Mechanic
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I haven't gotten more than ten mpg since the rebuild. I checked a couple of times with more highway than town driving and still didn't get but ten mpg.
The carb still needs a little adjusting but I don't think it would be that far off.
1951 styline deluxe sport coupe w/54 engine and power glide
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I haven't gotten more than ten mpg since the rebuild. I checked a couple of times with more highway than town driving and still didn't get but ten mpg.
The carb still needs a little adjusting but I don't think it would be that far off. The word "rebuild", much like the word "rare" are words used by many, but defined accurately by few. Depending on the depth of your specific rebuild, meaning (rings, cylinder boring, cylinder head resurfacing, block resurfacing, valves, valve seats, align boring, camshaft, rod and main bearings) and how many miles have passed since the rebuild, I would not expect too much too soon, in the form of good gas mileage. Fresh rebuilds = excessive friction = poor fuel economy.
1951 Chevy Styleline Deluxe 2 door sedan / purchased from second owner 6-19-2000.
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A posssible cause of your low gas mileage may be caused by the vacuum operated power piston. If you have a Rochester carburetor the thick baklite spacer must be used between the maniafol and carb. There are notches in the spacer and one of them lines up with a vacuum port under the carb. base. If the port does not get vacuum the power piston will stay in the full power or rich mixture position. Also a gasket should not be used in this location. If that is not the cause the power piston could be stck OR the spring above it is missing.
Gene Schneider
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Bob, it was a complete rebuild with all the things mentioned. I have about 500 miles on it now. Ready for oil change. I will drive it and see if things improve.
Chevy nut, I am running a Daytona, similar to Rochester. It does have the spacer but I did use a gasket there. I will call Daytona and check what is correct. They have very good to work with me
Thanks for the input, Pete
1951 styline deluxe sport coupe w/54 engine and power glide
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Then you are on your own with that....good luck.
Gene Schneider
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I was wrong. The carburetor is more similar to a Holley. He gave me a few other things to try. It will be a few days before I will have time to work on it.
1951 styline deluxe sport coupe w/54 engine and power glide
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I was wrong. The carburetor is more similar to a Holley. He gave me a few other things to try. It will be a few days before I will have time to work on it. I know ZERO about a Daytona carb, but do know Chevrolet utilized Carter and Rochester in the '49 to '52 era. Must be a valid reason for their choices. For CERTAIN, 500 miles on a rebuild is way too soon to be measuring fuel consumption. I would CONSIDER measuring fuel consumption after 2,000 accrued miles. Please remember to vary your driving condition (city vs highway) and vary your highway speeds (example: 50 to 65, then back down).
1951 Chevy Styleline Deluxe 2 door sedan / purchased from second owner 6-19-2000.
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thought he was refeing to a complete rebuild of the carburetor.
Gene Schneider
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Maybe he was referring to a carb rebuild, don't know.
1951 Chevy Styleline Deluxe 2 door sedan / purchased from second owner 6-19-2000.
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Backyard Mechanic
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Backyard Mechanic
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I was talking about engine rebuild. The carburetor is a new Daytona.
1951 styline deluxe sport coupe w/54 engine and power glide
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I was talking about engine rebuild. The carburetor is a new Daytona. Since you replied to me, I fully understand you are talking about an engine rebuild and a Daytona carb. In my post # 391535, I was speaking of your Daytona carb .... and Rochester and Carter, but have never heard of the name "Daytona", as it relates to a carb. Is Daytona a carb rebuilder company ?
1951 Chevy Styleline Deluxe 2 door sedan / purchased from second owner 6-19-2000.
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It is a universal carburetor for all makes of cars. If you are lucky it will function OK on some models.
Gene Schneider
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It is a universal carburetor for all makes of cars. If you are lucky it will function OK on some models. I now see that it is a Universal Carb, after looking on their website. Being a "universal fit", I wonder what jetting was decided upon, to be used.
1951 Chevy Styleline Deluxe 2 door sedan / purchased from second owner 6-19-2000.
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Backyard Mechanic
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The Daytona, supposedly, has adjustable jets. I have the instructions in the garage but I believe that you hold the rpm at 2000 and adjust to best resulting rpm or vacuum.
The service department has been great to try to help me but if I don't get it straightened out soon I am going to look for another Rochester.
The throttle body is bad on the Rochester that I have and I could not find one. That is why I thought I would try the Daytona.
Again, thanks for all the input.
1951 styline deluxe sport coupe w/54 engine and power glide
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The Daytona, supposedly, has adjustable jets. I have the instructions in the garage but I believe that you hold the rpm at 2000 and adjust to best resulting rpm or vacuum.
The service department has been great to try to help me but if I don't get it straightened out soon I am going to look for another Rochester.
The throttle body is bad on the Rochester that I have and I could not find one. That is why I thought I would try the Daytona.
Again, thanks for all the input. You may be confusing "carburetor jet" with "carburetor mixture screw". If the throttle plate shaft has a "sloppy fit" within the base of the Rochester carb., bushings can be machined to create a proper fit.
1951 Chevy Styleline Deluxe 2 door sedan / purchased from second owner 6-19-2000.
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