Hello folks how are yall.What i was wondering was what type of gas milleage are you guys getting with caburated combos.some input would be great thanks.

 

89 RS, 6.0, Trex cam, T56 6 speed, holley 750 double pumper, 4.30 gears, 17 around town and beating it, 22-24ish on the highway.

94 GMC, stock 4.8 liter, 4L60 trans, 3.42 stock rear, 17 give or take. I never fine tuned it. Slapped it together with a 750 vacuum secondary and beat the snot out of it. Still kicking.

The others i never checked.

 

72el camino
5.3 duelplan intake
Eddy 600
Th400
12 bolt 2.72
Highway 70 m/ph
20.1

 

Notta clue here LOL

Anything over 10

 

Old thread, but I would like to contribute to the database:

1973 4D Nova
3300lb, plus 300lb w/me+gear
junkyard 5.3 all stock
Mechanical Speed Demon 750
TH350
2.73 rear gear

Averaging about 15MPG bewteen city and highway. But I also run that junkyard motor pretty hard. 80MPH cruise on freeway, moderate launchs from the lights. Next step is to plug in the MAP sensor to allow me to fine tune based on mani vacuum. And MAYBE a wideband tune! But I don't drive this thing to save gas!

 

Check the other thread above I don't wanna type it again (12-15mpg)

 

1974 mgb 4.8 stock freshened up(lower end bearings, rings,lifters,timing chain and gears)
edelbrock 600 elec choke
shorty headers into 2 1/4 duals flowmasters
3.90 gears rear with 25 inch tall tires
averageing 17-18 town and highway but I cannot seem to let my foot up just to much fun so I guess not to bad but I do need to fine tune

 

Lq9 with ls3 heads large cam and a single plane with a th400 3400 stall 3.73 gears 26" tire and I got 13 mpg @70 mph (3600 rpms) with 2 wot burnouts to blow the tires last weekend. I got closer to 24 mpg at 55 mph a month ago tho. I need overdrive lol