What real world mpg are you getting?
02-12-2012, 10:46 PM
#1
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What real world mpg are you getting? in process of doing a 5.3l swap into a 73 nova, Curious to what mpg others are getting? I am either going ls1 intake or old school intake with 4150 throttle body look. engine will be stock except cam and tune, 4l60e, 3.08/3.23(undecided) gears, and 26.5 inch tires. thanks
02-13-2012, 10:29 AM
#5
+26 MPG @ 70-75mph My Chevelle has a Stock 99 LS1 w/LS6 Intake, Edelbrock Headers, it got 26+mph on the Highway doing 70-75, taching around 2k with Viper T56, 4.11's and 275x40x17 tires..
Not sure what I get on the street. just never watched it, cause my foot is usually in it.. LOL
Not sure what I get on the street. just never watched it, cause my foot is usually in it.. LOL
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02-13-2012, 03:18 PM
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Sweet! all are welcome the more diversity the better. I was hoping to see mid 20's looks like I will get close. searched and search with no luck. Hopefully this thread will help others, and convince the skeptics. With numbers like that I am going to convert all three of my classic chevy's. once I finish tearing the nova down and get it back from the stripper I will start a post. Thanks to all those that lead the way.
02-13-2012, 04:41 PM
#10
A lot of it is matching gearing and engine torque. That's especially true for hiway milage. I probably under-geared both my cars. Newer vettes run a 3.42 rear with 0.50 OD.
Keep the rpm way low at hiway cruising speed and you can get really good milage with these motors. I doubt anyone is getting 30mpg, but 25mph hiway shouldn't be a problem.
Btw, I like driving mine too, so getting better milage than mt DD makes it great.
Keep the rpm way low at hiway cruising speed and you can get really good milage with these motors. I doubt anyone is getting 30mpg, but 25mph hiway shouldn't be a problem.
Btw, I like driving mine too, so getting better milage than mt DD makes it great.
02-13-2012, 05:30 PM
#12
gas milage hello ls1tech fam. How are you all getting such good milage? I have '87
c10, 5.3/4l60e, 3.73 posi traction, drive tuned, JBA shorty headers, dual exhaust, 26 inch tires. the drive tune was setup for 93 unleaded gas only. i guess the tuner tuned it for agressiveness. recorded milage 16-17mpg city/highway.
c10, 5.3/4l60e, 3.73 posi traction, drive tuned, JBA shorty headers, dual exhaust, 26 inch tires. the drive tune was setup for 93 unleaded gas only. i guess the tuner tuned it for agressiveness. recorded milage 16-17mpg city/highway.
02-13-2012, 10:31 PM
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87 C10...its big and heavy and has the aerodynamics of a house. Thats one problem. 
For what its worth, my 66 Chevelle has gotten 23.5 as a high and 17 as a low. (LS2 4L70, 3.55, 275/50/17)
For what its worth, my 66 Chevelle has gotten 23.5 as a high and 17 as a low. (LS2 4L70, 3.55, 275/50/17)
02-14-2012, 02:40 AM
#19
gas milage hey, dont talk about my truck. im sensitive. lol. but im looking to get the best of both worlds. is that possible? can i get good/milage with a decent tune/power/torque? is dynotuning the answer? that costs. learn to tune my self like the merv? i even thought abought upgrading the 5.3/4l60e to ls6. the merv gets around 24 mpg like a few others on this site. my truck is fun to drive and i would like more power with out sacrificing mpg. any helps is appreciated.
