Gas efficiency and RPM - Page 2
+ Reply to Thread
Page 2 of 2 FirstFirst 12
Results 16 to 19 of 19

This is a discussion on Gas efficiency and RPM within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Originally Posted by poly_poly-man ..even if you're talking a steep uphill which requires WOT at 2k. Now acceleration is a ...

  1. #16
            MainFrame's Avatar
    Join Date
    Sep 2002
    Austin, TX
    I Support ClubWRX I Support ClubWRX
    Quote Originally Posted by poly_poly-man View Post
    ..even if you're talking a steep uphill which requires WOT at 2k.

    Now acceleration is a different matter altogether.

    That's contradictory.. because driving up an incline is accelerating in a sense, even if RPMs are kept constant. I have the feeling WOT at 2k RPM is going to consume much more fuel than 7% throttle opening angle at 5k RPM.. when I get my car back I can test it and post graphs of IDC to see.

    Think about the Top gear episode where they proved a Prius gets worse mpg than a M3 driving at the same pace..

  2. Remove Advertisements

  3. #17
    Registered User poly_poly-man's Avatar
    Join Date
    Feb 2010
    Rochester Institvte of Technorcery
    The problem I have with that top gear episode is that they're fundamentally different cars, with completely different everything.

    I'd really like to see that test done, actually - I may figure out a way to do it myself.

    BTW, making sure I'm clear on this - the IDC for the 5k situation would be lower than the 2k situation, but has to be multiplied by 5/2, since there are 5/2 times as many injector firing events, right?
    My big thread: The Used WRX Buying Checklist - Please Contribute!

    My current car: 2002 WRB WRX Wagon.
    Mods: GM BCS, Carberry SD rom, uppipe, AEM UEGO, Klunk Killer, F+R shifter bushings, head unit

  4. #18
    Registered User Chance1218's Avatar
    Join Date
    Mar 2012
    I Support ClubWRX
    Quote Originally Posted by michaelwfox View Post
    I shift at 2.5k and cruise on the highway at 65mph (speed limit here is 55 anyway lol). I'm averaging 24-27 mpg.

    Not that mpg even matters

  5. Remove Advertisements

  6. #19
    Registered User
    Join Date
    Jan 2005
    Canada B.C.
    I have been watching my ScanGauge and how my gas mileage if effected by how I drive for the last 7+ years, and without fail I ALWAYS get better MPG when I shift early and keep the RPMs down... Now I'm sure there are "some" situations that higher RPMs may work out just a little better but generally not...
    '02 WRX 4EAT, 311,000KMs/194,500Miles, Sold. Best car I ever had. '09 STi stage 1, hope this one will be good too...

+ Reply to Thread
Page 2 of 2 FirstFirst 12

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself. We strongly suggest that you stay away from using aol, yahoo, msn, and hotmail accounts. Sometimes the mail server blocks the emails from our server. As a result you will not receive any notifications including the confirmation email.

Please select your insurance company (Optional)


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Posting Permissions

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts