LS1SS4ever

Just want to know how many miles can you run on a full tank? Does 5.3 consume fuel more than 5.7?

robiferretti

ummm...i dunno, but if your really concerned about gas milage should you be modding?

wicked 98z

gas milage and hot rodding dont really mix. I average 10 to 12

Deeavi

iTrader: (16)

I don't know about the difference in the heads, but depending on the cam and gear you are runnining your gas mileage will vary. My 98 Z-28 gets around 22 miles to the gallon on the highway and 17 in town. That is if I drive sensable! It is possible to have a fast car and get decent mileage. It just takes some planning! My 98 Z has mostley bolt-ons right now, but I am getting ready to do some more work on it! We will see , but I am hoping to get at least 18 highway and 14 city when I am done.

I had a 80 Z-28 with a 408 ci small block, Ported Edelbrock Performer RPM Heads, a Crane 236/242-538/558 hyd roller cam, a Performer RPM intake, a massaged 750 vac. secondary carb, Hooker 1 7/8" headers, a 700R4 transmission, and 3:73 gears.
I got 18 mpg on the highway (55/60 mph) and between 12 & 14 mpg city with that car. It had right at 480 hp and 500 ft lbs of torque. Never could get it to hook up with street tires and I never put slicks on it, but it was Fast!

Yes, it is possible to have both, performance and decent mileage!

I wish I had never sold that car, but some one offered me a big price for it and I let it go.

30th t/a

iTrader: (51)

i had a 100% full tank. drove 4 hours and 15 min to rapid motorsports and had a 1/4 or a little under a 1/4 when i got there. that was untuned.... i think it was 260-270 miles.

Deeavi

iTrader: (16)

That is around 20 mpg since these cars only hold 15 gallons and you had aroun 1/4 tank left

Steve Burger

iTrader: (33)

Why do you care? I think I get about 20 on the highway but never checked. I did not add H/C for mileage. If that is a big concern for you this may not be the route you want to take.

offaxis

iTrader: (19)

I get around 220-240 miles per tank but I have a loose converter and a lead foot

Deeavi

iTrader: (16)

I like the fact that I can have a car that is efficient and is not hard on the pocket book. When gas goes up to $2.00 a gallon and higher it will make a difference. If you want to drive a race car on the street that fine. But I have been there done that. Now I just like driving my car. Maybe I am getting old, but that is what matters to me. Everyone is different! That's what makes Hot Rodding a fun thing to do!

Kevyn

iTrader: (2)

210-220 per tank city driving

Colonel

23 MPG on the interstate running 80-85 MPH. Runs 11.2 in the 1/4. You CAN have performance and efficiency.

Tally TransAm

iTrader: (17)

i get roughly 11-13 in the city and 26-29 on the highway

Miriah

Same with me, I'm right around there... and I drive both back roads and parkway to work and home.

94-98 Trans Am

I got a c5 (lighter), its mostly stock w/ headers, gutted cats, intake, I got 460 out of a tank (17 gallons), and still had a few miles left in the tank, of course when I drive all city I only get about 16mpg babying it for the most part. If you set the cruise control on the highway in these cars, the gas mileage is insane.

-Corey

14u2nv

I have gotten 330 miles from a full tank in my H/C SS. Most of that was highway though. To get decent mileage you will have to short shift or skip shift if you have a 6 speed. I typically pull away from a stop in 1st with very little gas and shift to 2nd before 2500rpm and then at about 20mph I shift right to 4th then at about 28-30 I shift to 5th. I commonly cruise in 6th 35-40mph. The 4.10s really help out, but I still do this in my stock 00 WS6 with the 3.42s.

99 Black Bird T/A

iTrader: (4)

~280 to 310 with heads, cam & 4.10's

Before H & C 340+

Best mpg before H & C 32.8mpg

Best mpg after H & C 26.5 mpg