20+ MPG from a carbed V8?
04-08-2010, 12:14 PM
#51
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Car: 86 F-bird TA
Engine: 383
Transmission: T5
Axle/Gears: 4.10
Re: 20+ MPG from a carbed V8?
prob not the best expert on this one, with my 4.10's I get about 12mpg out of my 360... 
good luck to you though!
good luck to you though! 
04-08-2010, 04:44 PM
#52
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Car: 1986 Z28 Iroc
Engine: 350
Transmission: T5
Re: 20+ MPG from a carbed V8?
I get about 27-30 on the highway. I have a 350 with lg4 top end stuff on it, carb, sensors, etc. I get around 16-18 in town. I have a 5spd car though, and that helps. I turn about 1750rpm at 70-75 on the highway.
04-10-2010, 05:13 PM
#53
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Re: 20+ MPG from a carbed V8?
I get about 24 on the highway, with an Edelbrock 600, on a 350 vortec motor, without running the a/c that is. not bad at all but then again we're still running the highway-gears in the rear. Gonna go back to fuel injection and maybe some 3.08's out back and try to keep the same miles/gallon.
04-19-2011, 04:54 PM
#55
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Car: 84 Z28, '15 Colorado
Engine: L69
Transmission: A4
Axle/Gears: 3.73
Re: 20+ MPG from a carbed V8?
Rebuilt L69 with a 327 Corvette Cam (blame the original owner, just bought it).
Smog Removed
Various Connectors not connected
3.73 Gears
75 MPH trip up and down good sized hills = 17-19 MPG
Smog Removed
Various Connectors not connected
3.73 Gears
75 MPH trip up and down good sized hills = 17-19 MPG
04-20-2011, 02:23 AM
#56
Re: 20+ MPG from a carbed V8?
Original stock L69, ccqjet, 3.73 gears and 700r4 @ 70mph = 22mpg highway.
Newly installed 355 with 3.73 gears, 700r4, and ccqjet @ 70mph =18.5mpg highway.
I'm turning 2600rpm @ 70, thinking of trying a 3.08 gearset to see if I can eek back up over 20.
Newly installed 355 with 3.73 gears, 700r4, and ccqjet @ 70mph =18.5mpg highway.
I'm turning 2600rpm @ 70, thinking of trying a 3.08 gearset to see if I can eek back up over 20.
Last edited by Ozz1967; 04-20-2011 at 02:32 AM.
04-26-2011, 06:59 AM
#57
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Re: 20+ MPG from a carbed V8?
I was very slightly over 30mpg on my all extremely highly tuned(stock parts with the exception of dual snorkel aircleaner and muffler from the p.o) 86z28(canadian) 40,000 mile car at sea level.
Can't see a lg4 camaro getting more than this. I spent a lot of time tuning it just to see what I could get out of it performance and mileage wise. The mileage sucked in city driving.
Can't see a lg4 camaro getting more than this. I spent a lot of time tuning it just to see what I could get out of it performance and mileage wise. The mileage sucked in city driving.
04-30-2011, 03:14 PM
#58
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Car: 1982 Camaro Berlinetta
Engine: GM crate motor Goodwrench 5.7 350
Transmission: 700R4
Axle/Gears: 3.23
Re: 20+ MPG from a carbed V8?
Holly crap!! I gotta know whats going on with my car then, at best i get 10 mpg. I got a rebuilt Q-jet on a new goodwrench 350 crate, and a old and tired th200c trany (no overdrive probably contributes a lot to it)
04-30-2011, 05:57 PM
#59
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Car: 87 Camaro
Engine: 305 LG4 (H)
Transmission: 700r4
Axle/Gears: 2.73
Re: 20+ MPG from a carbed V8?
Highway driving its mostly about vehicle weight and gearing, city driving its weight, engine size and driving habits.
04-30-2011, 06:44 PM
#60
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Car: 87 Camaro
Engine: 305
Transmission: 700R4
Re: 20+ MPG from a carbed V8?
I got 27mpg in the last trip I took with my 355 Camaro. It had an Edelbrock RPM intake with a 1406 600cfm carb on it. It was stock other than that and the bore. I wish I still had it.
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