i don't know what you guys are doing to get that kind of gas mileage? but my avg in new cars and i mean a new cars is about 20. it's very hard for me to belive that you guys are getting over that in a carbed car but maybe i just drive my cars too hard, maybe you live in a land where there is no traffic or just maybe you need to go back to elementary school and learn division! lol! "The formula for converting to miles per US gallon (3.785 L) from L/100 km is , where x is value of L/100km. For miles per Imperial gallon (4.546 L) the formula is . In Europe, the two standard measuring cycles for "L/100 km" value are motorway travel at 90 km/h and rush hour city traffic. A reasonably modern European supermini may manage motorway travel at 5 L/100 km (47 mpg US) or 6.5 L/100 km in city traffic (36 mpg US), with carbon dioxide emissions of around 140 g/km. An average North American mid-size car travels 27 mpg (US) (9 L/100 km) highway, 21 mpg (US) (11 L/100 km) city; a full-size SUV usually travels 13 mpg (US) (18 L/100 km) city and 16 mpg (US) (15 L/100 km) highway. Pickup trucks vary considerably; whereas a 4 cylinder-engined light pickup can achieve 28 mpg (8 L/100 km), a V8 full-size pickup with extended cabin only travels 13 mpg (US) (18 L/100 km) city and 15 mpg (US) (15 L/100 km) highway. An interesting example of fuel economy is the microcar Smart Fortwo cdi, which can achieve up to 3.4 L/100 km (69.2 mpg US) using a turbocharged three-cylinder 41 hp (30 kW) Diesel engine. The Fortwo is produced by DaimlerChrysler and is currently only sold by one company in the United States (see external link ZAP). The current record in fuel economy of production cars is held by Volkswagen, with a special production model of the Volkswagen Lupo (the Lupo 3L) that can consume as little as 3 litres per 100 kilometres (78 miles per US gallon or 94 miles per Imperial gallon). The last Lupo was built in July 2005. Diesel engines often achieve greater fuel efficiency than petrol (gasoline) engines. Diesel engines have energy efficiency of 45% and petrol engines of 30%.[2] That is one of the reasons why diesels have better fuel efficiency that equivalent petrol cars. A common margin is 40% more miles per gallon for an efficient turbodiesel. For example, the current model Skoda Octavia, using Volkswagen engines, has a combined European fuel efficiency of 38.2 mpg for the 102 bhp petrol engine and 53.3 mpg for the 105 bhp — and heavier — diesel engine. The higher compression ratio is helpful in raising efficiency, but diesel fuel also contains approximately 10-20% more energy per unit volume than gasoline.[3]" now if you read all that what are you guys getting... probably the same cuz i wouldn't read it either lol!
Well as you can tell it really depends on what gears you have, how the engine is built and my personal opinion on the subject is that the brand of carb and the type tranny you run have A LOT to do with it. When I had my 70 maverick with the 302 it had head work done, had a cast iron 4bbl intake and a Holley 650 that was jetted up and running a C4 with a shift kit and what I believe was 3.25:1 rear gears and it got around 10-12 and less if I kept my foot in it. The Tan Grabber I have now with the 302, 4 speed, eldebrock intake and 600 cfm carb and stock 3.00:1 gears and it is getting around 19 on the highway and between 15-17 runnign back and forth to work. So you be the judge. It all depends on how you build it, what fuel system you use and what gear ratio and tranny you run. have fun with it is the most important thing
It also depends heavily on where you live and drive. mav man is in cali in the city. even without commuter traffic in the bay area i got 14-18 depending on how many stoplights i had to sit at and how fast traffic on the freeway was moving. during rush hour forget it be closer to 12. out here in NV i get 18-20 18 being if i drive through town and if i gun it off the line at the two lights in my 40 mile drive. Heck my old 390 gets 17 here, LOL
so your saying with my 4000 stall and 4:62 gears i can't get 19mpg? lol! yep your right when you just sit your MPG goes down the tubes! it only takes me an hour to get to work and 1-1/2 to get home via about 30 miles... what's wrong with that?
When I drove to the gathering last year I made it from home in O'Fallon, IL to Elilzabethtown, KY on a single tank of gas, had to stop about 4 miles out to finally tank up. I figured around 23mpg at about 60-65mph. This is a roller-cam 306, stock heads, a 600 holley, and a stock c4.
I know that, I just wanted to get some general numbers. That's good to hear because I was planning to go to about 300hp.
I get between 18 and 21 5.0 roller block standard bore (was new) 289 crank 5.315 rods speed pro pistons 9.2 cr 68 302 4v heads 3 angle valve job new springs new stock size valves. stock roller cam out of an 86 5.0 (non mustang) Edelbrock performer 289 intake Edelbrock 1404 500 cfm electric choke carb 4 speed toploader (wide ratio) 2.79 8" rear gears (open diff) 245 60 14 tires on 7" wide magnum 500's 55 mph at about 2100 to 2200 rpm 80 mph at about 3000 rpm 105 mph at about 4000 rpm I drive it every day rain or shine even when I have to scrape frost off the windows at 4:00 am to go to work (and no I don't let it warm up) never have to pump the gas pedal to start as it fires right up within about 1/2 turn of the crank then press the gas pedal just enough to increase the rpm when cold (idling warm is about 800 to 900 rpm, when cold 600 to 700 rpm) Duraspark 2 distributer vacuum advance not hooked up. the hybrid 289 pulls about 16" to 17" vacuum at 55 mph on level roads. If you want the best mpg get a good vacuum gauge like this one and keep the vacuum as high as you can.
Oh yeah, gotta love the Bay Area traffic! At least there is usually some idiot doing something unbelievable to "amuse" the few people paying attention.
Mine gets zero miles to the gallon It doesnt move for that matter. Doesnt even have a motor inside the car yet
The Mileage quote I made was from an interstate trip up to summit and back , Gassed up , hit the interstate ,cruised at around 65 mph(NO stop and go traffic) about 115 miles later I had used about 8 gallons. This was a couple of years ago so I don`t have the exact miles and gallons now. But the day I checked it I recorded the miles and gallons exactly to come up with my mpg figure of 14.6.
My mav gets good mpg. once a week we go to the restaurant of 15 years, and lately the people ask how many mph per, gallon does your hot rod car get. Well i pull the wallet out an call for our waitress, well let me see looks like 27,50 plus tip. Let us all feel good that we dont pay 5 to 7.50 per gallon like in europe
Two things that affect mileage more than anything else: 1. properly functioning vacuum advance 2. the nut behind the wheel between them #2 is the biggest affector.
