TResistance Posted April 25, 2018 Report Share Posted April 25, 2018 Hello friends. This question is basic... Does anyone know how much fuel a 1600 engine consumes? miles / gallon or kilometers / liters. I'm playing with the settings, since at one time was consuming 0.26 gallons for 3 miles. But right now I have paid attention to tire pressure, ignition time (BTDC) and gaps. Today, I did a test and walked 6 miles for 0.26 gallons. It can be better. I know. My engine is stock, with some type improvements: Coil, spark plug wires, high flow filter and little btdc. thanks a lot. Quote Link to comment
datzenmike Posted April 25, 2018 Report Share Posted April 25, 2018 Also depends on the car it's in and it's weight, highway or city or a mix of both, level or mountainous and your gallon size. US, liters or Imperial. I assume a 710? All I can say is my 710 with L20B (2000cc) and 5 speed was about 29 MPG on a 2 thousand mile trip. That's US gallons. Imperial gallons was 33/34? 1 Quote Link to comment
banzai510(hainz) Posted April 26, 2018 Report Share Posted April 26, 2018 maybe float to high or choke is still on will cause bad gas milage 1 Quote Link to comment
datzenmike Posted April 26, 2018 Report Share Posted April 26, 2018 Yeah .26 is almost 1/3 gallon. You should get almost 8-10 miles out of that. 1 Quote Link to comment
TResistance Posted April 26, 2018 Author Report Share Posted April 26, 2018 Yeah .26 is almost 1/3 gallon. You should get almost 8-10 miles out of that. Thank you, datzenmike. Yup, is a Datsun 710 with 1600 cc and 4 speeds. I used 4 days to week principaly into the city. The Mexico's City, It is at a height of 2,250 metres above sea level. Quote Link to comment
TResistance Posted April 26, 2018 Author Report Share Posted April 26, 2018 maybe float to high or choke is still on will cause bad gas milage Thank you, banzai510(hainz). -choke- I suppose, but a month ago, it did not ignite by carburetor and it was cleaned, but I'll check it. Quote Link to comment
banzai510(hainz) Posted April 26, 2018 Report Share Posted April 26, 2018 If this car was from sealevel and you bought it and it now get bad gasmilage I guess it jetteing needs to be changed. have you cked you timming also.? 1 Quote Link to comment
TResistance Posted April 26, 2018 Author Report Share Posted April 26, 2018 If this car was from sealevel and you bought it and it now get bad gasmilage I guess it jetteing needs to be changed. have you cked you timming also.? Nope, the car has always been of city. Recently I worked with timing, and get a double increase a millage. The next option is: verify a choke. and optionaly calibrate the valves. Quote Link to comment
banzai510(hainz) Posted April 26, 2018 Report Share Posted April 26, 2018 Im not a carb jetting expert but if car is upper altitude aI THINK YOU WANT THE LEAN OUT THE FUEL JETS. Make smaller number 1 Quote Link to comment
TResistance Posted April 26, 2018 Author Report Share Posted April 26, 2018 Im not a carb jetting expert but if car is upper altitude aI THINK YOU WANT THE LEAN OUT THE FUEL JETS. Make smaller number The altitude is the same since I buying the car, (more than less 10 years), but, 3 months for today increase the consume of fuel and try with screw to the mixture to reduce a consumer. Quote Link to comment
datzenmike Posted April 26, 2018 Report Share Posted April 26, 2018 The mixture screw only adjusts idle... has no effect on regular driving mileage. 2,250 meters is huge. That's 7,000 feet. If the car was bought for high altitude use it may be ok My 710 is from Nevada where the average altitude is 5,000 feet. It had a #97 primary jet in it and it ran alright. I live literally at sea level and tried a #112 and performance and mileage increased! If you are at 7,000 feet I would expect a primary jet in the high #90s. 1 Quote Link to comment
john510 Posted April 27, 2018 Report Share Posted April 27, 2018 Yeah .26 is almost 1/3 gallon. You should get almost 8-10 miles out of that. Wouldn't .26 be a lot closer to 1/4 of a gallon ? how could it be possible to get a 1600 cc motor to get 12 MPG ? unless you had dual Mikunis or Webers. 1 Quote Link to comment
Dawa Posted April 27, 2018 Report Share Posted April 27, 2018 might've already been mentioned but its all about how heavy your foot is, and what gears you drive in/what rpm you operate at. slow take offs from lights, riding around in higher gear (as long as youre not going up hills or don't NEED to accelerate) etc will help you increase your mileage per tank. 1 Quote Link to comment
datzenmike Posted April 27, 2018 Report Share Posted April 27, 2018 Wouldn't .26 be a lot closer to 1/4 of a gallon ? how could it be possible to get a 1600 cc motor to get 12 MPG ? unless you had dual Mikunis or Webers. You're right, I rounded up. So 24 MPG isn't that bad, though low. Altitude and driving style and driving in the city could easily explain this then. Quote Link to comment
racerx Posted April 27, 2018 Report Share Posted April 27, 2018 24 is not bad for carburated. Back on the days, if you got 20mpg I were all that since American big v8 cars prolly got 12 mpg. Quote Link to comment
TResistance Posted April 30, 2018 Author Report Share Posted April 30, 2018 The mixture screw only adjusts idle... has no effect on regular driving mileage. 2,250 meters is huge. That's 7,000 feet. If the car was bought for high altitude use it may be ok My 710 is from Nevada where the average altitude is 5,000 feet. It had a #97 primary jet in it and it ran alright. I live literally at sea level and tried a #112 and performance and mileage increased! If you are at 7,000 feet I would expect a primary jet in the high #90s. Thanks, datzenmike. I check the primary jet and I think that number is wrong. He have 60 and 70. I will try to buy the number what do you say to comparate. Quote Link to comment
TResistance Posted April 30, 2018 Author Report Share Posted April 30, 2018 Wouldn't .26 be a lot closer to 1/4 of a gallon ? how could it be possible to get a 1600 cc motor to get 12 MPG ? unless you had dual Mikunis or Webers. thank you, john 510, No, i don't have a dual Mikunis or Weber's. Is a stock carburetor. Is a Nikki. When i see a fuel is a decreasing drastically, i was think it some is wrong. I decided to ask Quote Link to comment
TResistance Posted April 30, 2018 Author Report Share Posted April 30, 2018 might've already been mentioned but its all about how heavy your foot is, and what gears you drive in/what rpm you operate at. slow take offs from lights, riding around in higher gear (as long as youre not going up hills or don't NEED to accelerate) etc will help you increase your mileage per tank. Thank, Dawa Yes, i know it. The conditions of driving change, but when i try a driving slow, the fuel is down dramatically, in other ways I drive a 37 mph. And in 2 days an 1/4 of tank is gone. The carburator is stock. I think something is wrong. A one year ago an 1/4 of tank last a 2 weeks. Quote Link to comment
banzai510(hainz) Posted April 30, 2018 Report Share Posted April 30, 2018 I had a Fiat in Germany after I blow up my Ford Capri. My gas milage was horrible. Find out I had a tiny rust hole half way in tank, DUH!!!!!!!!! Was embarrassing you ck your oil? Does it smell like gas? maybe the fuel pump diaphrame is bad. Sucking gas in to the oil also 1 Quote Link to comment
DanielC Posted April 30, 2018 Report Share Posted April 30, 2018 "how could it be possible to get a 1600 cc motor to get 12 MPG ? "I used to tow a two horse trailer with a 521, in the 1970's. I live near Portland, Oregon, and went to many horse shows requiring travel in the Columbia gorge. On one trip back down the gorge, the wind was blowing up the gorge. I spent a good part of the time in the gorge, in second gear, at 5,000 RPM, almost wide open throttle, very definitely into the secondary barrel of the carb. The basically stock 521 got 11 MPG in that stretch of freeway. Basically stock means 2' exhaust pipe, and roadster clutch. 1 Quote Link to comment
TResistance Posted April 30, 2018 Author Report Share Posted April 30, 2018 I had a Fiat in Germany after I blow up my Ford Capri. My gas milage was horrible. Find out I had a tiny rust hole half way in tank, DUH!!!!!!!!! Was embarrassing you ck your oil? Does it smell like gas? maybe the fuel pump diaphrame is bad. Sucking gas in to the oil also Thanks banzai510(hainz). I'll check what do you say. Maybe a fuel pump is a problem. Quote Link to comment
Dawa Posted April 30, 2018 Report Share Posted April 30, 2018 ! my thoughts exactly. I think there might be a leak in your fuel system somewhere. start at fill hose, then tank, then lines to filter, lines/hoses from there to carb. 1 Quote Link to comment
TResistance Posted April 30, 2018 Author Report Share Posted April 30, 2018 "how could it be possible to get a 1600 cc motor to get 12 MPG ? " I used to tow a two horse trailer with a 521, in the 1970's. I live near Portland, Oregon, and went to many horse shows requiring travel in the Columbia gorge. On one trip back down the gorge, the wind was blowing up the gorge. I spent a good part of the time in the gorge, in second gear, at 5,000 RPM, almost wide open throttle, very definitely into the secondary barrel of the carb. The basically stock 521 got 11 MPG in that stretch of freeway. Basically stock means 2' exhaust pipe, and roadster clutch. Thank you, DanielC. I think that is possible. When I carry a repair at carburator I tolt to specialist what the consume is very high, he don't believe and I show 13 registers of tank fully and the odometer. He say: His car consumes at like a big v8. In Mexico, the datsun are popularly called "donkeys" because they cover large kilometers with so little. But, 12MPG is a joke. Quote Link to comment
banzai510(hainz) Posted April 30, 2018 Report Share Posted April 30, 2018 They called then Donkeys in Afganistan also then the Toyota Hilux tookover Quote Link to comment
TResistance Posted April 30, 2018 Author Report Share Posted April 30, 2018 ! my thoughts exactly. I think there might be a leak in your fuel system somewhere. start at fill hose, then tank, then lines to filter, lines/hoses from there to carb. Dawa, Thanks. Once upon into the car smelling gasoline and remplacement a hose and it was the solution. I'll check. Quote Link to comment
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