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4 cylinder shift points... keeping the revs low

Discussion in '4 Cylinder' started by tooter, Jun 27, 2013.

  1. Jun 27, 2013 at 7:29 AM
    #1
    tooter

    tooter [OP] play every day

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    Built for maximum low end torque, tooter II.VII intake manifold spacer, LCE long tube header, Injen long tube intake, 2,900 rpm torque peak.
    I've noticed that running the 2.7 up to higher rpms on level roads doesn't necessarily make the truck accelerate a whole lot faster than shifting at lower rpms. It seems more efficient to let the slow turning 4 banger do what it does best... pull. So I've been reminding myself to shift at about 2,000 rpms, and will find out if it helps the gas mileage. This works out to these shift points:

    1st to 2nd: 15mph
    2nd to 3rd: 25mph
    3rd to 4th: 35mph
    4th to 5th: 50mph
     
  2. Jun 27, 2013 at 7:32 AM
    #2
    rickmeseke

    rickmeseke subaru of america

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    yes, it will help gas mileage.
     
  3. Jun 28, 2013 at 2:03 PM
    #3
    jassco

    jassco Well-Known Member

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    Good to see experimentation and good information, but there are many configurations that can change this. An access cab and 4x4 will be lugging all day with that. I shift at 3000 RPM with my 1st to 2nd shift, then 2500 for the rest of the gears. It gets the truck moving well and 21mpg average here in the North East. A little more weight to push. :cool:
     
  4. Jun 28, 2013 at 7:01 PM
    #4
    iroh

    iroh Well-Known Member

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    My shift points match that list pretty closely. With those speeds for shift points it's closer to 2500 rpm on the 4x4.
     
  5. Jun 28, 2013 at 7:05 PM
    #5
    KenLyns

    KenLyns Lord of War

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    That makes sense, because the 2TR-FE starts making torque at 2500 rpm.

    If you want to hustle, you gotta upshift above 5000 rpm for max power. :cool:

    [​IMG]
     
  6. Jun 28, 2013 at 7:09 PM
    #6
    Goosedog

    Goosedog Well-Known Member

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    I've averaged the last three tanks and got the same, with what I consider normal shirting. With an advertised 24city/27hwy, its good to hear I'm not far from other real world milages. I was beginning to wonder if I did rev too high at the top of each gear. I didn't get the 4banger to set new milage records, I just wanted a solid truck that will lug really well and the 6cyl was simply more than I needed.
     
  7. Jun 28, 2013 at 8:02 PM
    #7
    tooter

    tooter [OP] play every day

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    Built for maximum low end torque, tooter II.VII intake manifold spacer, LCE long tube header, Injen long tube intake, 2,900 rpm torque peak.
    That sounds just right for a 4x4. The only reason I shift at 2,000 without lugging on level roads is that my 2.7 is in a no frills base model standard cab 5 lug 4x2 with no AC or power steering. The engine doesn't do anything else except move the truck, Using it as a fully loaded work truck, so far it's been averaging 24mpg with no freeway driving.
     
    Last edited: Jun 28, 2013
  8. Jun 29, 2013 at 9:19 AM
    #8
    Maineiack

    Maineiack Well-Known Member

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    My reg cab 4x4 does alright up here in Maine. I try to keep the shifts between 2500 and 3k and get pretty decent mileage with everyday driving.
     
  9. Jun 30, 2013 at 8:35 AM
    #9
    tooter

    tooter [OP] play every day

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    Built for maximum low end torque, tooter II.VII intake manifold spacer, LCE long tube header, Injen long tube intake, 2,900 rpm torque peak.
    Thanks for posting that chart, Ken. :)

    It documents an interesting fact. The 2.7 is rated by the factory at 159hp at the output shaft and yet only makes 119hp at the wheels. This indicates a whopping loss of 40hp in the drivetrain. I'm really surprised it's that much!
     
    Last edited: Jun 30, 2013
  10. Jun 30, 2013 at 8:38 AM
    #10
    tacokid09

    tacokid09 it's about the off-road miles

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    119 at the wheels? damn.... i wonder how much HP i have with 35s and no regear :anonymous:
     
  11. Jun 30, 2013 at 8:43 AM
    #11
    Kelson

    Kelson My Truck is Cuter than Yours

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    i think he had clogged cats at the time of the dyno pull.
     
  12. Jun 30, 2013 at 10:47 AM
    #12
    tooter

    tooter [OP] play every day

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    Built for maximum low end torque, tooter II.VII intake manifold spacer, LCE long tube header, Injen long tube intake, 2,900 rpm torque peak.
    Were you actually there for the pulls or are you just joking around? ;)

    Rear wheel drive has considerable parasitic drag from the transmission and third member plus there is more loss from all of the accessories dragging on the serpentine belt.

    Does anyone else know if another bone stock Taco 2.7 dyno chart exists?
     
    Last edited: Jun 30, 2013
  13. Jun 30, 2013 at 2:01 PM
    #13
    jassco

    jassco Well-Known Member

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    Yes the one from URD supercharger kit. Same 120.
    [​IMG]
     
  14. Jun 30, 2013 at 3:27 PM
    #14
    Kelson

    Kelson My Truck is Cuter than Yours

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    whoops got the dyno sheets mixed up. lol

    for some reason i thought that was the URD one when i posted lol. it was mentioned in that thread that he had clogged cats.
    which might help explain the small differences in power. :p
     
  15. Jun 30, 2013 at 3:46 PM
    #15
    YotakingO

    YotakingO Well-Known Member

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    Great info! I normally shift at 3000 RPM. Gonna try this.
     
  16. Jun 30, 2013 at 3:55 PM
    #16
    MightyMouse-SCT

    MightyMouse-SCT Well-Known Member

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    Same here . Unless I'm in a residential neighborhood I'm keeping it at 3-3.5k shift points .
     
  17. Jun 30, 2013 at 6:09 PM
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    motorhead1257

    motorhead1257 Member

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    I just bought my 1st Taco and LOVE IT... It's a 2010 Reg. Cab 4x4 longbed 5spd. 4cyl. and it took me some serious driving and reminding myself it's not like my 7.3L Powerstroke with a chip. LOL I noticed on mine that the shift points between 2,000 and 3,000 1st. to 2nd. shift point and then 3,000 to 4,000 from 2nd. gear on. The redline is at almost 6,000 rpms so shifting below 5,000 should be more than safe I would think. Anyhow, thanks for the posts and information on here.

    Les
     
  18. Jun 30, 2013 at 6:20 PM
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    tacokid09

    tacokid09 it's about the off-road miles

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    i shift below 3000 on the street, anytime off road, im not shifting until im at 4500+ :D
     
  19. Jun 30, 2013 at 11:42 PM
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    tooter

    tooter [OP] play every day

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    Built for maximum low end torque, tooter II.VII intake manifold spacer, LCE long tube header, Injen long tube intake, 2,900 rpm torque peak.
    Good. Thanks! :)

    117hp and 119hp from two independent sources confirm a reliable stock hp baseline. :thumbsup:

    This is really valuable information for anyone who wants to accurately measure any gains from their 2.7 mods.
     
  20. Jul 23, 2013 at 3:47 PM
    #20
    Gapup

    Gapup New Member

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    While still in my 02 conv cab - 2.4/5spd - I got in the habit of shifting at the 10's. I continue to do the same with this 07 2.7/5spd.

    1st to 2nd: 10mph
    2nd to 3rd: 20mph
    3rd to 4th: 30mph
    4th to 5th: 40mph

    There might be occasions to boost the shift range up when attaining cruise more quickly but by and large, I use the 10's system in everyday city travel. I also do a lot of coasting. Traffic light turns red up ahead? Kick it into neutral and coast to the light.
     
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