MPG
Legend
Joined: Apr 2006
Posts: 9,112
Likes: 1
From: Spring, TX
RE: MPG
ORIGINAL: 5.0LTREATER
OPEC is going to send someone looking for you if you continue to talk like that.
ORIGINAL: grswat
****I think we could get a neon up over 50 mpg easily.****
****I think we could get a neon up over 50 mpg easily.****
Legend
Joined: Feb 2006
Posts: 9,284
Likes: 1
From: mendota, illinois
RE: MPG
after i put the turbo on my car and got it running correctly, i was able to get about 50 more miles on a full tank then before the turbo......sure the turbo needs more gas, but if your not having to beat up the car as much to get the output you want, then how come it would use alot more gas???
Rookie
Joined: Feb 2006
Posts: 87
Likes: 0
From:
RE: MPG
It is called physics. Namely volumetric effeciency. There ispotential volumentric efficiency, and there isacheived volumetric efficiency.
Volume = a measured amount. A turbo puts more of a measured amount in the cylinder than a N/A car. We both agree on this. More is more anyway you slice it, unless the laws of physics cease to exist under the hood of your car.
Why do you get more MPG with a turbo than before. Many variables could dictate this. Was you car tuned correctly for maximum mpg when it was N/A? I am sure you were driving the car hell bent for leather when it was N/A, and now that it is turbo'ed you can get the same effect, speed, power, etc., quicker so you get out of the throttle sooner. I understand your reasoning. You may get more mpg because you don't drive the car as hard, but this is not because a turbo uses less fuel. It is because you have changed your driving habits or driving style. In other words if you drove your car to 100% of its potential all the time and you got X for mpg, and you drove you car to 100% of its potential while turbo'ed the mpg would be considerably less. If you drive your car turbo'ed at 50% of its potential this does not change the potential volumetric effeciency of the engine, but the achieved effeciency. Volume is volume, the only thing that can change is outside variables like how you drive your car.
If it makes you feel better to think that the turbo gives you better mileage, and not your new driving style,then give the turbo the credit, I'll support that.
Volume = a measured amount. A turbo puts more of a measured amount in the cylinder than a N/A car. We both agree on this. More is more anyway you slice it, unless the laws of physics cease to exist under the hood of your car.
Why do you get more MPG with a turbo than before. Many variables could dictate this. Was you car tuned correctly for maximum mpg when it was N/A? I am sure you were driving the car hell bent for leather when it was N/A, and now that it is turbo'ed you can get the same effect, speed, power, etc., quicker so you get out of the throttle sooner. I understand your reasoning. You may get more mpg because you don't drive the car as hard, but this is not because a turbo uses less fuel. It is because you have changed your driving habits or driving style. In other words if you drove your car to 100% of its potential all the time and you got X for mpg, and you drove you car to 100% of its potential while turbo'ed the mpg would be considerably less. If you drive your car turbo'ed at 50% of its potential this does not change the potential volumetric effeciency of the engine, but the achieved effeciency. Volume is volume, the only thing that can change is outside variables like how you drive your car.
If it makes you feel better to think that the turbo gives you better mileage, and not your new driving style,then give the turbo the credit, I'll support that.
Rookie
Joined: Feb 2006
Posts: 87
Likes: 0
From:
RE: MPG
Spud, thanks for making this thread interesting!! Everyone else also. Great input. It helps to exercise the head muscle every once and again. Sorry about the back to back post but I just wanted to say thanks.
Thread Starter
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Veteran
Joined: Feb 2007
Posts: 317
Likes: 0
RE: MPG
I think the theory behind the turbo getting better mileage is that prior to being turboed the car would generally be running rich and once the forced air is added then the same amount of fuel is creating a lean condition and the car gets up to speed quicker and uses less throttle to maintain said speed. Dunno if that makes sense but it is my thoughts on it.
Legend
Joined: Feb 2006
Posts: 9,284
Likes: 1
From: mendota, illinois
RE: MPG
ORIGINAL: 5.0LTREATER
.
I am sure you were driving the car hell bent for leather when it was N/A, and now that it is turbo'ed you can get the same effect, speed, power, etc., quicker so you get out of the throttle sooner. I understand your reasoning. You may get more mpg because you don't drive the car as hard, but this is not because a turbo uses less fuel. It is because you have changed your driving habits or driving style. In other words if you drove your car to 100% of its potential all the time and you got X for mpg, and you drove you car to 100% of its potential while turbo'ed the mpg would be considerably less. If you drive your car turbo'ed at 50% of its potential this does not change the potential volumetric effeciency of the engine, but the achieved effeciency. Volume is volume, the only thing that can change is outside variables like how you drive your car.
.
I am sure you were driving the car hell bent for leather when it was N/A, and now that it is turbo'ed you can get the same effect, speed, power, etc., quicker so you get out of the throttle sooner. I understand your reasoning. You may get more mpg because you don't drive the car as hard, but this is not because a turbo uses less fuel. It is because you have changed your driving habits or driving style. In other words if you drove your car to 100% of its potential all the time and you got X for mpg, and you drove you car to 100% of its potential while turbo'ed the mpg would be considerably less. If you drive your car turbo'ed at 50% of its potential this does not change the potential volumetric effeciency of the engine, but the achieved effeciency. Volume is volume, the only thing that can change is outside variables like how you drive your car.
Rookie
Joined: Feb 2006
Posts: 87
Likes: 0
From:
RE: MPG
ORIGINAL: spudsterier
after i put the turbo on my car and got it running correctly, i was able to get about 50 more miles on a full tank then before the turbo......sure the turbo needs more gas, but if your not having to beat up the car as much to get the output you want, then how come it would use alot more gas???
after i put the turbo on my car and got it running correctly, i was able to get about 50 more miles on a full tank then before the turbo......sure the turbo needs more gas, but if your not having to beat up the car as much to get the output you want, then how come it would use alot more gas???
However in the beginning of the thread the statement was that a turbo with 6psi would increase mpg. Again this is BS. If you would have properly tuned your car and changed your driving habits to be condusive with maximum mpg, you could have achieved the same result when your car was N/A. Which would conclude that the turbo had nothing to do with it.
Again, a turbo vs an N/A car in the identical set of parameters will not getbetter mileage than the N/A car unless the driver compensates by reducing the demand on the turbo'edcar.
I am not trying to say you are wrong and I am right. I was just trying to answer your question as to why. Once again I did agree with you about your mileage. OMG, I feel my IQ dropping discussing this with you.
Everyone I retract everything I said in this thread. Spud is absolutely correct. Go buy a turbo and you will get better fuel mileage, no exceptions. (Disclamer: when your mileage does not improve with a turbo, because not everyone will change thier driving habits, take it up with Spud.)
