The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

**Rich72C10** · 10-31-2021, 08:13 PM

So..... back to timing and mileage after going off topic on my 72 Rochester Quadrajet - though my newly rebuilt carb is tuned different that the 78 Carter Quadrajet!

Did a nice Sunday drive around the hill country here in Texas and got a very nice 18.5 MPG! With my new Progression Ignition and its app, I was able to watch my vacuum and keep it within 4 points of idle max (which is 16~17), unless I was taking off which then I tried not to go below 7~9 inches.

Also with the app, I can show you my timings too - see attached screen capture of my current settings.

10-31-2021, 08:13 PM	#120
Rich72C10 Mr. Cheyenne Join Date: Jun 2020 Location: Kyle, Texas Posts: 1,644	Re: Timing & Gas Milage So..... back to timing and mileage after going off topic on my 72 Rochester Quadrajet - though my newly rebuilt carb is tuned different that the 78 Carter Quadrajet! Did a nice Sunday drive around the hill country here in Texas and got a very nice 18.5 MPG! With my new Progression Ignition and its app, I was able to watch my vacuum and keep it within 4 points of idle max (which is 16~17), unless I was taking off which then I tried not to go below 7~9 inches. Also with the app, I can show you my timings too - see attached screen capture of my current settings. Attached Images __________________ Richard *'72 Chevy C10 Cheyenne Super WHT/MED BRONZE/WHT SBC 350 \| TH350 \| LWB \| AC \| Buddy Seats Upgrades:** Tilt \| Front Sway Bar \| Radio \| Sliding Window \| Bed Spare w/Lock Bed Rails \| Full LEDs \| Courtesy Lights \| Tachometer \| Glovebox Lock & Light \| Head Light Relays \| *Upgraded Fully Super Trim