what speed/rpm gives the BEST gas mileage?
Originally Posted by blazed54
interesting.... I always go in as high a gear as possible when driving through town and my mpg every week for the past couple months has been about 21 mpg. I will test out your theory about keeping it between 2-3k rpm and will post in about a week to see if my gas mileage shows an improvement or loss. thx 
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Joined: Oct 2003
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From: Marietta, Georgia
Use a diagnostic computer and view the injector open time in milliseconds then multiply this amount of gasoline flow by rpms. This will yield the exact fuel used per minute.
Obviously the lowest rpm possible [lowest speed] will yield the best.
Why engineers use gasoline weight per hour or grams per second.
You also know air flow into engine from MAF in grams per second and you know a steady engine rpm needs 14.7 AF so easy to calculate how much gasoline flow you need.
Obviously the lowest rpm possible [lowest speed] will yield the best.
Why engineers use gasoline weight per hour or grams per second.
You also know air flow into engine from MAF in grams per second and you know a steady engine rpm needs 14.7 AF so easy to calculate how much gasoline flow you need.
Originally Posted by Q45tech
Use a diagnostic computer and view the injector open time in milliseconds then multiply this amount of gasoline flow by rpms. This will yield the exact fuel used per minute.
Obviously the lowest rpm possible [lowest speed] will yield the best.
Why engineers use gasoline weight per hour or grams per second.
You also know air flow into engine from MAF in grams per second and you know a steady engine rpm needs 14.7 AF so easy to calculate how much gasoline flow you need.
Obviously the lowest rpm possible [lowest speed] will yield the best.
Why engineers use gasoline weight per hour or grams per second.
You also know air flow into engine from MAF in grams per second and you know a steady engine rpm needs 14.7 AF so easy to calculate how much gasoline flow you need.
Your name fits you well, because that shizzle was in tech speak!
Originally Posted by Q45tech
Use a diagnostic computer and view the injector open time in milliseconds then multiply this amount of gasoline flow by rpms. This will yield the exact fuel used per minute.
Obviously the lowest rpm possible [lowest speed] will yield the best.
Why engineers use gasoline weight per hour or grams per second.
You also know air flow into engine from MAF in grams per second and you know a steady engine rpm needs 14.7 AF so easy to calculate how much gasoline flow you need.
Obviously the lowest rpm possible [lowest speed] will yield the best.
Why engineers use gasoline weight per hour or grams per second.
You also know air flow into engine from MAF in grams per second and you know a steady engine rpm needs 14.7 AF so easy to calculate how much gasoline flow you need.
i do a lot of city driving, do you think tt would help my city mileage? i know it would hurt my highway mileage, but i have to think that the added torque would allow me to keep my rpms lower when im stop and go.
Last edited by NOBI; Mar 1, 2008 at 08:24 PM.
Originally Posted by NOBI
i do a lot of city driving, do you think tt would help my city mileage? i know it would hurt my highway mileage, but i have to think that the added torque would allow me to keep my rpms lower when im in go.
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Joined: Oct 2002
Posts: 539
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From: Falkville, AL
Originally Posted by gsingh350Z
Wow! That is fantastic gas mileage. I thought my 31mpg was high...
What's your secret davidv?
What's your secret davidv?
Yeah, the HR performs a lot better and saps a LOT more gas.
My fuel economy just plain blows on the highway. Trying to figure out how to get more mileage at ~80 mph.
Obviously something needs to change to make the engine more efficient at ~2,500 RPM's. Thinking plenum
My fuel economy just plain blows on the highway. Trying to figure out how to get more mileage at ~80 mph.
Obviously something needs to change to make the engine more efficient at ~2,500 RPM's. Thinking plenum
Once I realized after buying my '08 that I can still afford my car, go out. And pay for gas. I stopped caring about my gas mileage.. But I would flip if I needa fill up twice in a week. I'd havta do some serious road trip driving for that to happen.... I fill up average every 5 days usually....
Originally Posted by evil_tt
TIRE PRESSURE?
The best I have gotten was 31mpg. I have been noticing that my gas mileage drops poorly in colder weather. For instance, the other day it was 48 degrees out and I was getting 27.5mpg. A couple days after I got 30.8mpg at 68 degrees. Interesting...
Originally Posted by gsingh350Z
Nope. I checked tire pressure and it's around 34-35 psi all around.
The best I have gotten was 31mpg. I have been noticing that my gas mileage drops poorly in colder weather. For instance, the other day it was 48 degrees out and I was getting 27.5mpg. A couple days after I got 30.8mpg at 68 degrees. Interesting...
The best I have gotten was 31mpg. I have been noticing that my gas mileage drops poorly in colder weather. For instance, the other day it was 48 degrees out and I was getting 27.5mpg. A couple days after I got 30.8mpg at 68 degrees. Interesting...
