Cliff's Quadrajet Parts and Rebuild Kits

General Category => Quadrajet Carb Talk and Tips => Topic started by: Glutenfreecarbs on June 28, 2021, 12:28:45 PM

Title: Q-jet fuel economy stories
Post by: Glutenfreecarbs on June 28, 2021, 12:28:45 PM

Just curious if anybody is taking summer road trips and tracking their fuel consumption?

I got 19.6 MPG during a trip across the Ohio turnpike this past weekend in my 1970's land yacht, running about 74 MPH with the A/C blasting.

Title: Re: Q-jet fuel economy stories
Post by: tayto on June 28, 2021, 02:01:40 PM

I just did my first (full) fillup on my Squarebody. I will keep you posted. Last year got 16 mpg in the Rockies with about 1000#
lbs of camping gear doing 110-130 kph.

Title: Re: Q-jet fuel economy stories
Post by: 68rs/ss on June 28, 2021, 06:30:53 PM

Best I ever got was 24mpg. With a 68 Camaro 10:1 355ci, 5spd. All highway at roughly 2000-2400rpm. Cliff's kit, advise and recipe. Best working carb ever.

Title: Re: Q-jet fuel economy stories
Post by: Brian B. on June 30, 2021, 04:56:29 AM

My stock '74 SD-455 TA auto w/3:08 got 14mpg driving 70mph on various interstates from the Woodward Dream Cruise back to Chicago years ago.  Around town it only gets 9mpg.

Title: Re: Q-jet fuel economy stories
Post by: Cliff Ruggles on June 30, 2021, 05:57:03 AM

9mpg around town?  Unlikely you'd make it thru a full tank without a few FULL throttle blasts!.......

Title: Re: Q-jet fuel economy stories
Post by: Brian B. on June 30, 2021, 06:32:25 AM

Oh there were a few full throttle blasts "around town". All in the name of scientific inquiry of course!

Title: Re: Q-jet fuel economy stories
Post by: Cliff Ruggles on June 30, 2021, 11:26:42 AM

That's expected, don't think I've ever ran a tank of gas thru the Ventura where it didn't get "cleaned out" half a dozen times....or more!....

Title: Re: Q-jet fuel economy stories
Post by: Glutenfreecarbs on June 30, 2021, 04:15:07 PM

I'd probably be above 20 MPG if I stayed out of the secondaries... And I'll admit I get right down to 12 MPG during summertime city driving; running the A/C compressor, idling around jobsites, "hurry-up-and-stop" traffic in suburbia, waiting in line at the brew-through, etc...

Title: Re: Q-jet fuel economy stories
Post by: 73ss on June 30, 2021, 06:31:02 PM

I'd guestimate 14~15 with my old 454 setup on the expressway, In OD, With convertor locked up. Like many of you, It's a challenge to stay out of the secondaries from time to time. Speedo reads 7 slow so couldn't get an exact figure.

Title: Re: Q-jet fuel economy stories
Post by: Greasy Harley on July 04, 2021, 12:47:38 PM

My '79 K10 has a 350, sm465, 3.73:1 gears and 32/11.50/R15's.
It gets 10mpg ...it can get 12 (just not the way I drive it) ;)