Ok...take a breath.....and relax. Jesus Christ, you're going to have a cardiac episode over this 100 rpm deal.Ford engineers and dozens of 2018 press reviews reveal there is 500rpm increase to the redline with the new engine, now up to 7500rpm. Ford release the new 2018 model without correction, and the redline is 7400rpm.
To this day, (because of that press) most people think the 2018 (and 2019) GT redline is at 7500rpm....including you and you own one with the redline staring you in the eyes every day! There is no 100rpm buffer. There is zero buffer. The redline is 7400rpm.
Which bar?Is there an argument at a bar over this? Or is this a hypothetical?
Valve float was a very effective rev limiter in those days...I remember reading that the '69 and '70 Boss 302s had a rev limiter (6,150 rpm). It was a little unusual back then, but the Boss had heads that could support HUGE rpm with 302 cubes. Most V8s would self-limit through lack of air flow and so the user would feel the power decreasing and logically shift to the next gear. I'm sure there are other examples of rev limiters from the 60s and early 70s, but I don't know about them.
Yeahnah....Also, "redline" is fuel cutoff, not where the red line starts. Per the definition, it's the max engine speed achievable. Being marked with a red line is an "option", but is not dire to the definition
Firstly, welcome to 1985. I posted the dictionary definition of redline in the first post of this thread.Well, tried the same thing in track mode last night, still got 7390 RPMs.
Also, you can disagree all you want, but you're wrong. Dictionary definition, bud. It's the max engine RPM, not the little red indicators on the gauge...
That's what I was quoting in my first comment, with "Per the definition, it's the max engine speed achievable"Firstly, welcome to 1985. I posted the dictionary definition of redline in the first post of this thread.
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.Secondly, the redline on the tacho and fuel cut aren't always coincident.....that was what I was disagreeing with you about. I accept that in the case of the 2018 Mustang GT, based on your testing, they do appear to be the same.
Of course, always glad to help out!Finally, thank you for your efforts confirming the 7400 redline .
Fewer people over-revving it?
I don't think there's any hard rule about where to set a redline indication. Eventually it comes back to however much margin the mfr is comfortable with, relative to any number of things.
It could be that 7500 is fuel cut and 7400 on the gauge is just enough lower to help people use as much of that as possible without actually having fuel get cut on them when they're running hard.
Norm
You sure about that?Not for anything built with carburetors and points/condenser distributors. A hard, rpm-based, fuel cut needs some sort of electronic link between ignition and fueling.
Early electronic ignitions may have effectively had a rev limit through their modules' inability to reliably provide a good enough spark at higher rpms. But that would have been more of a side effect to the main reason for their existence (dealing with lean mixtures and early emission-control tech). Not that early emissions-era OE heads and cams were good enough at higher rpms to make it worth going up there in the first place.
Norm