Thread: Hot rods and MPG

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3400 chevy50 chevy coup 3 speed auto 400 with 3800 stall 27 tall tires 390 gear with a blown 548 cid 10to1 CR rework rec port heads solid roller 700/700 @268 /275 110 lsa .B&M mega blower two AFB 750s 10 pounds of boost enough HP and TQ to drag a two story house down the road . better then 12 mpg if you can keep your foot out of it and under 60 mph

76 Chevy full size pickup, 350 TPI, 700r4 OD tranny, 3.40 gears, 31'' tires, AC on and about 600 LBS in the back I got 17 MPG at 70 MPH. I was turning about 2000 RPM's.

For my current build I have been thinking about mileage as well as a ton of torque.

The car I'm working on is a 1941 Chrysler New Yorker.
Engine will be a 496 stroker with 10.5 :1 compression.
Aluminum GMPP heads, Edelbrock Pro Flo XT intake, LS1 ECM running the sequential injection and controlling tranny shifts.
Transmission is a 4L80e with a GearVendors overdrive unit screwed behind it.
3.55 gears with 29'' tall tires.
I'm guessing 4200 LBS for the car when finished.

I'm hoping for 20 MPG on highway cruising.

Any thoughts on this?

86 monte ss 402 10.50:1 th400 3200 stall 3.08 gear. lucky to get 9 on highway and 6 in town
im jealous of your good gas mileage!!! lol

Originally Posted by bel_mor

86 monte ss 402 10.50:1 th400 3200 stall 3.08 gear. lucky to get 9 on highway and 6 in town
im jealous of your good gas mileage!!! lol

well if your talking about me? mine did seem that it was pulling down mild teens some may call B.S at the time it was lean but ran very good engine was just past idle so there was no load and going into intake PSI from VAC the blower engine like timing so i put as just as it would take then pulled timing out under a load with a boost master. i added more jet to the carbs and pulled a wee bit of timing out still is better then 6mpg or somone drives it and fill the gas tank that i do not know about ? i will have to talk to my mother :0 going down the hi way i can not do that very long i carring to much gear fine for a short blast the sweet spot is under 50 mph but like IC2 said who caresi use to drive it on week ends were i wanted to go i kept the tank filled all the time .most of the time i neve burnt more then 10gallons .i been known to drive abit on the hard side they still may be looking for a very loud low flying black in color UFO around these parts