7AT rev limiter

UNKNOWN_370

My car bogged down and started revving hard at 4800rpm and the needle was bouncing between 4700rpm and 5000. It felt like if I tried to push the gas any harder I was going to break something in the engine. My wife was with me and she bore witness. Its an awesome feature and even though I'm guilty of it too...
I'm shocked no one just said, hey let me try this in the year and 1/3 there has been anv 11/12 models. The 09 and 10 models didn't even have the selection in the computer. We had that option now and nobody even touched it in all this time? They just figured its for the light and handed out false preaching???? Wow.

Augustus

Very interesting.

Set the light for 2k and try the experiment again. @5K, there's going to be some natural strain/resistance from the engine. The instant you back off the throttle, the AT's going to upshift. But @2K, there's no resistance; the engine will very freely rev above 2K and it should be very easy to tell that it's actually limiting revs. Put it in Manual mode, floor it. If it actually holds you at ~2K without shifting, then it's a bona fide rev limiter. Neat.

In my 6MT, the setting triggers the light. Nothing more, nothing less. It does not actually limit the RPM range. I can set my light for 2K and wind it out to 7k+ RPM. Makes zero difference to the operation of the engine. The owner's manual makes no indication that it should actually affect engine performance, either for an AT (5-15) or MT (5-19).

And other than the 4k RPM limit suggestion during break-in, why would this shift-limit feature actually be useful? Can't you just use your right foot to control the shift point? The AT will do what every AT does and automatically react to the throttle input. What purpose does it serve to be able to set an arbitrarily low limit? I mean, it's like a self-imposed limp-mode. I get it that it's an interesting feature, just curious why you'd ever really use it.

You crazy AT drivers.

Dark Sarcasm

i'm not sure if we are talking about the same thing anymore??!!! on my 2011 i can only set the REV LIGHT in the controls of the dash. and it only allows for adjustment of the REV light from about 6500 up to redline. I'm gonna go walk the dog and then test this out. I want video if this is true.

__________________
wax

Red__Zed

Video nao

TerribleONE

subd...

__________________

m4a1mustang

Sub'd... lol

Sent from my Galaxy Nexus

__________________
- Steve

Zs & Coffee - Saturdays at 10AM in Fairfax, VA and Columbia, MD (Click the banner!)
LIKE us on Facebook!

Trips

__________________

Dark Sarcasm

Myth - BUSTED. What is being referred to as a rev limiter is labeled "up shift" in the controls on the dash. I was able to adjust it from 2000 rpms up to like 8000 rpms. I have always had mine set at 6500 and always make it to redline. For this thread I moved the "up shift" to 4100. The only difference was the REV light came on at 4100. In manual and automatic it went to redline and back, with that little red light on solid after about 4300 rpms. Unless your model is differnt than my Z, there is no manually operated rev limiter in the Z.

__________________
wax

Red__Zed

Ohjhhhh snapppp

m4a1mustang

That's what I figured.

Did you feel any resistance?

__________________
- Steve

Zs & Coffee - Saturdays at 10AM in Fairfax, VA and Columbia, MD (Click the banner!)
LIKE us on Facebook!

Jamaica

Thats all we needed to hear. Thanks for the useful info

UNKNOWN_370

So which one is it? 6500 to redline? Or 2000 to 8000? Mine is 2k to 9k. Looks like our cars might be different... lol
Anyyyywaaayyyyyy....
I just realized today that I drove completely in manual. I'm going to check if auto mode has any differences in performance. Yesterday I did auto and manual.

Just so u know guys I'm not here tryin to fk up shyyt n fight. I'm just tryin to figure out where this thing works. I hadn't used it and now I'm just trying to figure it out with you all. I did feel resistance according to where I set it except 2k and 3k didn't feel as hard as the higher gears. 4-6 felt aggressive in the pull back. I did this thoroughly today except I didn't do it in auto. I will do it tomorrow.

elmz

It would be helpful if we had video proof of what you're experiencing

Spikuh

Seriously. If a picture is a 1,000 words, a video is like.... 1 billion, gagillion, fafillion, shabolubalu million illion yillion ... yen.

Dark Sarcasm

I didnt pay close attention to the exact numbers that I could set my upshift indicator. I did however pay close attention to the fact that ALL that setting does is change when the little red light blinks.

The first time I played with the setting I set the light to turn on at about 6500, again, not sure the exact number because all it does it blink, and it seemed like that would give me a fair enough warning to hit the paddle or the shifter before redline.

If you are feeling a change in the performance of your vehicle b/c of this little light then I am sorry to tell you it is a placebo effect. If you do want to adjust the rev limiter you can get an Uprev tune. I believe Uprev supports this function.

__________________
wax