Would a Vortec SC affect Gas mileage?
#31
04-11-2005, 02:58 PM
Join Date: Feb 2004
Location: Glen Rose, Texas
Posts: 6,417
Likes: 0
Received 0 Likes
on
0 Posts
#32
04-11-2005, 05:19 PM
Registered User
Join Date: Mar 2004
Location: Scottsdale, AZ
Posts: 317
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by malx
The gas milage is worse with s/c end of story. Because there is more pressure forced into the engine it needs more gas or something like that. I'm moving this to the tech and mod forum because that's where it should be.
#33
04-11-2005, 10:26 PM
Adding an S/C will decrease gas mileage. To what extent is dependent on many factors of course, but even theotretically, if you drove the car the same way you did without a S/C, the S/C motor would get lower gas mileage. Considering the S/C requires that the motor is contantly putting out more power to drive the S/C, figthing not only the weight of the parts, but the friction in the belts, pulleys, bearing and even the air it is pumping, there is always more wasted energy than without an S/C.
As far as the gas mileage photos, I'm a bit skeptical. Depending on how the system calculates it and how the fuel system is set-up, it may not read the additional fuel being injected into the motor. If the system calculates on a set fuel pressure relative to manifold pressure and injector pulsewidths, then any mods that change fuel pressure or larger injectors would not work properly. While I'm not saying you can't achieve good gas mileage, I'm not sure I would use the nav system's mpg calculator for this purpose. Depends on how it works and the fuel system upgrades for your particular charger works.
As far as the gas mileage photos, I'm a bit skeptical. Depending on how the system calculates it and how the fuel system is set-up, it may not read the additional fuel being injected into the motor. If the system calculates on a set fuel pressure relative to manifold pressure and injector pulsewidths, then any mods that change fuel pressure or larger injectors would not work properly. While I'm not saying you can't achieve good gas mileage, I'm not sure I would use the nav system's mpg calculator for this purpose. Depends on how it works and the fuel system upgrades for your particular charger works.
#34
04-12-2005, 10:39 AM
Join Date: Feb 2004
Location: Glen Rose, Texas
Posts: 6,417
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by CKwik
Adding an S/C will decrease gas mileage. To what extent is dependent on many factors of course, but even theotretically, if you drove the car the same way you did without a S/C, the S/C motor would get lower gas mileage. Considering the S/C requires that the motor is contantly putting out more power to drive the S/C, figthing not only the weight of the parts, but the friction in the belts, pulleys, bearing and even the air it is pumping, there is always more wasted energy than without an S/C.
As far as the gas mileage photos, I'm a bit skeptical. Depending on how the system calculates it and how the fuel system is set-up, it may not read the additional fuel being injected into the motor. If the system calculates on a set fuel pressure relative to manifold pressure and injector pulsewidths, then any mods that change fuel pressure or larger injectors would not work properly. While I'm not saying you can't achieve good gas mileage, I'm not sure I would use the nav system's mpg calculator for this purpose. Depends on how it works and the fuel system upgrades for your particular charger works.
As far as the gas mileage photos, I'm a bit skeptical. Depending on how the system calculates it and how the fuel system is set-up, it may not read the additional fuel being injected into the motor. If the system calculates on a set fuel pressure relative to manifold pressure and injector pulsewidths, then any mods that change fuel pressure or larger injectors would not work properly. While I'm not saying you can't achieve good gas mileage, I'm not sure I would use the nav system's mpg calculator for this purpose. Depends on how it works and the fuel system upgrades for your particular charger works.
#35
04-12-2005, 10:19 PM
I don't think the system uses the gas guage to record your gas mileage on the fly. That would be a function of speed vs injector duty cycle time. It would be hard for the system to measure how much gas is flowing out of the tank with the fuel guage sending unit. It's too slow to respond. However, I think it does estimate the 'miles to empty' based on the guage reading vs the average gas mileage within a certain period of time. But that number would be skewed as well if the actual mpg is not accurate.
#36
04-13-2005, 08:14 AM
Guest
Posts: n/a
In general what I've heard is it goes down slightly. You are forcing more air/fuel into the combustion chamber and there is parasitic loss from just running the S/C which theoretically tends to reduce mileage. This is offset by the more power you're developing and not having to step into the throttle as aggressively for a given amount of power (more efficient). But from the guys I know with S/C's they say they saw a 1-3 mpg decrease. As someone mentioned, depending on how rich you're running, there can be significant differences in mileage reduction.
Thread
Thread Starter
Forum
Replies
Last Post
RemmyZero
V36 DIY
10
04-23-2018 11:13 AM
Hogbone
Engine, Drivetrain & Forced-Induction
2
09-28-2015 06:44 PM
