7AT rev limiter
 

In my last thread ICY? We debated whether the 7at rev limit settings were a placebo red light indicator setting or a true rev-limiter. Initially I set the rev limit to 7200rpm just so I don't hit the red. (I do it slightly too often) when someone stated its just for the light and doesn't work on the auto.
For some odd reason people have argued this fact and no one has just actually set it and tried... so I decided to take the initiative about 45min ago. I set the limiter to 4800rpm and went into manual mode. Well I began getting a lot of resistance right under 48, the began screaming at 4800 and the rpms couldn't pass 5000: so AT guys. Unknown made it official that the 2011+ 370z-7 has a bonifide true rev-limiter. And don't let 6m haters tell you otherwise... speaking of hate.

I stopped at the stop sign n since I had no one behind me I set the limiter. The stop was an allway stop and I heard tthe screaming of a supercharger coming at me but didn't see anything. At that point I was done setting the RL when I heard this. I began to move and decided to wait and even though I had the right of way I decided to stop again.
Suddenly the car appears and its a GT500 mustang blowing by me and both driver and passenger pointed there middle fingers at me while they ran the all way stop. The idiots are so stupid cuz they did that to me, slowed down and went in there house garage. I know where they live. If I was another guy they'd be fked.

:rofl2:

Yup if I was you they would be in Trouble. LOL

Nice to know. Thanks for the research and testing.

You're welcome. :tiphat:

But... were you driving when you say it was limited? Because if I am in neutral and hit the gas, it limits it to 5000-5500 or so. If i'm in gear, it limits at 7500.

good thread, wish you could do it on the '09 :/

Of course I was driving. Why would I take my car out of the driveway if I didn't intend to drive and test it while driving???

To test it I drove in manual mode and it would not pass. It would bounce around between 4700 and 5000rpm. I did it in drive. It just smoothly changed gears at 4800rpm with aggressive throttle.

I think it was a valid question ಠ_ಠ

Thats a pretty cool feature! The rev setting on the 6m doesn't do that I dont think. It just flashy flashy that light.

If I'm not mistaken? The 6m has always worked like that since 09? Correct me if I'm wrong 6mt guys, but 6's have real rev-limiters.

man I really wish my car had this feature

:icon17:

Is this forreal? You can control the limiter on AT? If so, that is pretty neat. You can set it lower for your kids or valet parking.

fixed :tup:

haha j/k, I was thinking the same thing. Pretty useful if true.

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.

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. ;)

There's no resistance at 4800rpm when flooring it to 7500rpm EVER. The resistance came for the FIRST time ever when I set rev limiter...

Why would we use the Rev limiter? Wow, I can't believe you just asked that. But hey...

1) to aid in what would be optimum shifting for torque we would want to be somewhere around 200-400rpms past max torque. Max torque would be 5200rpm so the ideal setting around 5500rpm.
2) to utilize max horsepower without overreving as well. 7200rpm is prime because 7000rpm is peak HP. We shift in manual mode. And we can do 95% of what a real manual does except burnouts.
3) making sure we make ideal shifts for fuel econ. 4400 rpm would ensure we are not driving sporty. Some of us have a led foot which means we can't control ourselves. Rev limiting would help be a reminder.

PS I can check to see if it works at 2000rpm but it worked as it should at 4800. Don't be jealous if your manuals can't. Lol

As a means to control your AT to do perfect peak HP/torque shifts, then I get it. Fair points. :tup:

But how do you reconcile the difference between peak HP and torque? I mean, what do you choose? Torque for DD, HP for the track? Reminds me a little bit of the Top Gear M3 test where 0-60 took 5 minutes because of the required iDrive settings. :bowrofl:

As an electronic nanny to keep you from speeding .... :inoutroflpuke:

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.

Video nao

subd...

Sub'd... lol

Sent from my Galaxy Nexus

:wtf2:

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.

Ohjhhhh snapppp

Ok so I set the limiter to 2500 and went out on the highway instead of the street. Figuring maybe the blocks I was on may posiibly not have been long enough and following up like I was asked to. I went out and floored it on the highway. What I did notice was at first as the light was blinking. Resistance was present and it felt like the car was bogging down. As i I stayed persistant this time on the throttle. It broke past the RPM setting and stayed with a solid light.
I did notice where ever I set the limit I did get resistance and I could feel where I needed the shift and didn't need the light. But it did rip past through once the blinking stopped and the solid light appeared. I tried this in various settings and the resistance would occur wherever I set the rev limit.
Ex: if the limit was set to 2500rpm, that's where id feel bogging at every gear. But if I set it at 4k that's where the new sensation of bogging down was. But once the light goes solid, bogging breaks and the car drives normal.
My guess its a way to protect the car in case you forget where you set the limiter. Things should be explored like if this can be activated fully with a tune? The rev-range goes to 9000 rpm on the limiter. Anyway... this is the conclusion. Sorry for not taking it out on the highway and checking it on the slam for over 1000 ft. The bogging was hard enough on the street that I would change gears before the light went solid.
But this thread allows us to know more about it which is good.

That's what I figured.

Did you feel any resistance?

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

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 :inoutroflpuke:
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.

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

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

how do you set the upshift light? uprev?

No, it's in the settings menu on the screen to the left of the tach.

only applies to certain years correct?

7AT, I'm not sure, but it was there in my '09 6MT.

:iagree:

See page 2-23 of the owner's manual.

uhm must be in certain years. 09 manual doesn't seem to have it.

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.

dammit thought I had a rev limiter. Oh well. :rolleyes: