• When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

11-12 mpg with a 440

I was getting double digits with my 526" when I was using a Hughes 4650-BL3 hydraulic flat tappet with Stage 6 heads and 4.30 gears. It would average 13.2 - 13.6 mpg at 72 mph. It freaked me out the first time I took a long trip with it after the cam change. It was definitely an odd deal because before that the best I think I had ever got from any 440 was 10-11 mpg. 25" of vacuum while cruising at that speed as well. I don't see anywhere near that with the solid roller I run now.
 
threewood said:
I start to sweat whenever I see posted signs that say "Next service 50 miles":eek:
Click to expand...

Lol, Ya' need one of these with them 440's...…..
upload_2018-8-3_7-58-58.png
 
A friend had a 70 Charger RT w 440 auto w 4.10 gears with cam and carb change. He said it got 20 mpg and I said bs. He challenged me with a trip. He in his car and me in my 72 318 Charger. At our destination we filled the tanks. We both got the same mileage. 20 mpg.
 
I am pleased when I rarely kiss 17-18 on a trip with the TKO. More about range than mpg for me.
 
Not going to check mine, just buy fuel when I need it :D
 
YY1 said:
I'd LOVE to know what cam grind is getting double digit MPG from a 575-ish HP 440.
Click to expand...
I had a 292/509 in my 440/493 and got 12.8 mpg.......65 mph with a 3.91 and a Gear Vendors. (3.10 final drive in OD) That same combo got 10.6 mpg with a 3.23 and no overdrive.
 
The OP didn't say anything about an OD or gears did he?

Wow that old school 509 straight grind?
 
IMG_1690.PNG
I had to buy 2 gallons from Igor to make it to 93 and on to Vegas. 200 mile range just isn't enough sometimes.
 
YY1 said:
The OP didn't say anything about an OD or gears did he?

Wow that old school 509 straight grind?
Click to expand...

"I had a 292/509 in my 440/493 and got 12.8 mpg.......65 mph with a 3.91 and a Gear Vendors. (3.10 final drive in OD) That same combo got 10.6 mpg with a 3.23 and no overdrive."

It was the old style grind, not the revised one for better vacuum. It was installed with the timing marks aligned which actually resulted in a 1.5 degree retard setting. MP ignition set to 16 initial, 33 total. Edelbrock heads, RPM intake, Demon 850 VS, 2" TTI headers, 2 1/2" pipes.
 
Last edited:
Low end user here, so be nice. I plan to get a vacuum advance distributor going for next year. Just can't go 65 on those roads. 3:54 Dana TKO 5 fluid pissing Keisler.
 
IMG_1287.JPG
Scatpack said:
Love this picture, the fact that you are driving on gravel!
Click to expand...
That was after following him about 1/2 mile through the trailer park. Lucky to get out of there. It was behind this place. Fuel is for the Quads. Sorry to hijack thread. If I didn't take it on the road, I wouldn't care about the mileage.
 
If I don't beat it up,I can squeeze almost 12 MPG.That happened once.It's a 9:1 till the boost comes in.At cruise 2800 RPM there is almost 20 inches of vacume under the 2 toilets.
 
Dennis H said:
View attachment 634166
That was after following him about 1/2 mile through the trailer park. Lucky to get out of there. It was behind this place. Fuel is for the Quads. Sorry to hijack thread. If I didn't take it on the road, I wouldn't care about the mileage.
Click to expand...
Haha no worries man! At least you’re driving the car! Just got back from the parts store, was down-pouring but now it’s sprinkling. Only car I drive in the summer cause we have two seasons, long winter and short summer

04CFFF37-B254-48C4-AC99-3464D108C502.jpeg
 
You must log in or register to reply here.

Similar threads

Kern Dog
Towing with a Ram 1500 regular cab short bed
2 3
Replies
41
Views
2K
Nevada dan
Nevada dan
M
Howdy. New member with 70 Charger RT
2
Replies
26
Views
1K
moparedtn
moparedtn
R
Bob Beckwith, 9/11 rescuer who stood next to President George W. Bush atop debris, dies at 91
Replies
13
Views
647
GetX'd
GetX'd
64BEL
Pike's Peak and Old Smokey F1
Replies
2
Views
591
khryslerkid
khryslerkid
R
Tesla with a 1,395 mile range
2
Replies
31
Views
2K
1 Wild R/T
1 Wild R/T
Auto Transport Service
Back
Top