2018 Mustang GT Redline - 7400 or 7500?

Discussion in 'Mustang S550 General Forums' started by Jimmy G, Jul 15, 2018.

  1. jake_zx2

    jake_zx2 Well-Known Member

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    That's what I was quoting in my first comment, with "Per the definition, it's the max engine speed achievable"

    I know they aren't, I think there was a miscommunication here. What I was trying to say, is essentially "redline" is kind of like slang for "fuel cut", and sometimes it just so happens to be marked on the tach with a red line.

    Of course, always glad to help out!
     
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  2. Grintch

    Grintch Well-Known Member

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    Well often there is a soft ignition limit that is followed a bit higher by a hard fuel cut.

    My '15 tach makes it look like a 6500 redline, but all the magazines & specs say 7000. And I have seen various post suggesting it was actually 6800. I have only hit the limiter once, but I was on track passing another car and was too busy to check what the tach said.
     
  3. 99Zeus99

    99Zeus99 Well-Known Member

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    Going to the dyno soon with my 2018 GT manual. Will let you guys know what I find out.
     
  4. Dusten

    Dusten Well-Known Member

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    You sure about that?

    http://www.boss302.com/rev.htm

    The 1969 and 1970 boss had a factory installed rev limiter.

    FWIW if anyone is really that curious take your car out, and datalog it. See where it shifts with an auto(use the various modes) and if you have a manual just fucking send it in like 3rd gear till it stops.
     
  5. BrettT

    BrettT Well-Known Member

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    Well redlined in third (for the first time) my MY19 Bullitt the other week. The Tach hit 7,400, and before I could react, it was promptly followed by fuel cutoff…. I wasn't glued to the Tach, so can't say 100% if it went past 7,400 or not.....
     
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  6. Nuked

    Nuked Well-Known Member

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    7350 is the cutoff in the tune.
     
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  7. Dusten

    Dusten Well-Known Member

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    Just for fun.

    Drag mode. These shifts are 3-4 and 4-5 both about 7200-7300
    Not sure if it'll shift higher in a lower gear. Screenshot_20181012-171522_Torque.jpg Screenshot_20181012-171337_Torque.jpg
     
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  8. ihc95

    ihc95 Well-Known Member

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    One of the Mustang lead engineers says 7500 RPM (@15:55)




    /close thread
     
  9. OP
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    Jimmy G

    Jimmy G Hangin' about, waitin'..

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    I welcome you to 1985 as well. One of the reasons I started the thread.

    As we’ve shown here, he’s dead wrong. Redline is 7400rpm.
     
  10. DrGrabster

    DrGrabster UK Member

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    For those with an A10. Put your gearbox in S, use the flappy paddles and then stop the car with the engine still running and the gearbox still in flappy mode. Then put you foot down. The gearbox stays in 1st and you will get to 8,000 revs before the car has a chance to limit your idiocy.
     
  11. Brent Davis

    Brent Davis Well-Known Member

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    Although it’s a Whipple ‘18 and PBD custom tune, mine pulled all the way up to 8000 on a few other pulls. He actually was lifting a bit on these two pulls just shy of 8K.7455328C-54C6-469F-B3D4-D3A14C0CD012.jpeg
     
  12. Dusten

    Dusten Well-Known Member

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    Has anyone shown hard proof? A datalog of fuel cut?

    So you're saying fords hard limiter is 8k?
     
  13. DrGrabster

    DrGrabster UK Member

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    Not really, it's so quick inertia seemed to take over. The digi dash goes very red.
    Try it.
     
  14. Dusten

    Dusten Well-Known Member

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    I did. Rpms never exceeded 7500...

    Heres a quick log to show 7422 Screenshot_20181013-084321_Hancom Office Editor.jpg
     
  15. Silver Bullitt

    Silver Bullitt Well-Known Member

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    Maybe our gauges aren't accurate, but I've seen 7700 before with no cut (stock tune). I need to get my X4 unmarried from my F150 and log it.
     
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  16. ihc95

    ihc95 Well-Known Member

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    LOL yeah an engineer who actually developed the car is dead wrong :cwl:

    Personally I've seen my car shift at ~7600 at times unless the tach is wrong (which it most likely isn't)
     
  17. Dusten

    Dusten Well-Known Member

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    I'll try a lot with forscan later to see if its more accurate
     
  18. OP
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    Jimmy G

    Jimmy G Hangin' about, waitin'..

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    Use your eyes.

    The red line on your tach is at 7400 rpm.
     
  19. Dusten

    Dusten Well-Known Member

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    Forscan lists it as 6500 or 7400 on the tach. That doesn't mean the hard limiter is 7400.
     
  20. OP
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    Jimmy G

    Jimmy G Hangin' about, waitin'..

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    Let me clarify.

    The "redline" is the rpm point on the tach that the manufacturer recommends owners don't exceed as engine damage can occur past that point. In the 2018/2019 Mustang GT, Ford has drawn that line at 7400rpm. In the lead up to the 2018 Mustang GT's release, Ford said many times (incl in the video in post #48) that they had increased the redline by 500rpm to 7500rpm. Except they didn't. That claim was a marketing lie. They increased it 400rpm, to 7400rpm. Maybe they just like round numbers.....I just think it's stupid to say you've gone to 7500 when you've drawn the red line at 7400.

    "Hard limiter" or "fuel cut" or "ignition cut" is a separate thing. In the good old carby days you had to rely on the tach redline to determine when to back off. Now you have software that limits your rpm. Sometimes that software limit is coincident with the redline, sometimes it isn't. On this forum Hivel found a transmission software limit at 7400rpm, same as the redline limit. Nuked found the engine software limit is 7350rpm.

    Seems clear to me that Ford have limited the engine speed to 7350-7400, but for marketing purposes they claim they have raised it by 500rpm to 7500.
     
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