Joined: Sat Dec 10 2005, 04:28PM
Location: United States
Posts: 4954
OK. . .Many of you know I have a fuel injection system in my Fury. Excpet for foolin around with the idle, it seems to be working OK. I have also gone to electronic timing control. But I want to achieve the optimum if fuel economy.
Forget about the basics, keep your foot out of it, keep it in tune. No porlonged idle times. I have had dual exhaust installed with a "Balancing Tube" (Thought you were going to catch me Butch?) It's riding on 235/15's, front end is nice and straight, tire pressure is good.
So with all this in mind, what else can I do besides get a K Car?
Joined: Wed Oct 12 2005, 12:21PM
Location: Jersey, the only state that doesn't need the New...
Posts: 676
Well im just gonna ask... what octane do you burn... i read that higher octanes yeild better economy... although i also bet you knew that already too... I also can state that a person i knew with a 78 460 furd motor get remarkably better range on hightest then the 87 grade stuff....
Joined: Mon Feb 13 2006, 12:39AM
Location: Fresno, CA
Posts: 516
Steve, what are the specs for the FI system you're running in your Fury? And, what are the specs for the powertrain/rear gear?
I'm asking 'cause I'm unfamiliar with your Fury's setup. If you are not already doing so, using a newer sythetic oil in the engine would help, as would running a more modern profile roller cam, just for starters.
Although grafting on a Superbird nose DOES have a certian appeal
Joined: Sat Dec 10 2005, 04:28PM
Location: United States
Posts: 4954
I'm just running a stock open rear. . . 727 bolted to a 360. Nothing really specific. Not sure of the ratio on the rear. Spent so much time messin around with everything else on the car I never got that far
I have the Holley Commander 950 600 CFM TBI system with a custom distributor and electronic timing control
Joined: Fri Oct 14 2005, 07:26PM
Location: Pittsburgh,PA
Posts: 481
for best MPG, you might want to run the EFI with an o2 sensor that can switch from closed to open loope. I know that the Holley TBI kit has an optional harness for such a set up Tom
Joined: Mon Feb 13 2006, 12:39AM
Location: Fresno, CA
Posts: 516
Yeah, what furyman67 sez...if you don't have the ability to have the FI run "closed loop" (where the major input to run the fuel pulse and timing is determined by the O2 sensor when the car is at operating temp) you run the risk of "wasting fuel", as the system would run more rich...kinda like when an engine runs on start up.
The only other thing to do, in that regard, is to keep up on maintaining the coolant system, so the coolant temp sensor is responding to actual temp condition. I know this may sound simple, but I experienced this when I was going through the smog class of auto tech, when I had a '89 Lincoln Mark VII as one of my 3 smog test cars. It was my folks vehicle, and they got it from a police auction....
Anyway, the previous owner prolly NEVER changed the coolant, because I saw chocolate MILK in the radiator when I was doing my preliminary inspection. I learned that Ford vehicles of that era were inclined to FAIL smog tests, due to the temp sensor NOT meeting the parameters for "closed loop" operation *running too cold*, and IF the coolning system was properly maintained, the engine would perform better and gains in fuel economy would be witnessed.
Sorry for the "War And Peace" reply. I hope my point helps though.
AND, if your gear ratio in the axle is numerically higher than 3.23, you could try to go with a numerically LOWER ratio, and see fuel gains *obviously*, but risk losing performance in the "off the line" part of driving.
Joined: Sat Dec 10 2005, 04:28PM
Location: United States
Posts: 4954
Thanks guys. I left out that. Good eye.
I'm running in closed loop now. It has a single stage O2 sensor, I was considering going to the quad stage unit. That's the one that requires and additional harness. (I think) The closed loop at idle is whenre I have been stumped. No load, the car has a rough idle. By the wat, the motor has 2000 miles on it