370z Rev Limiter

rosten99

Hey guys, Is the stock 370z's rev limiter an ignition cut or fuel cut? Thanks

EzDz

Its a fuel cut

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Rahul718

Bumping this. I came across a thread for the 350z and rev limiters. The first vid shows a VQ35HR that STAYS at redline when the needle hits it. I didn’t notice this kind of behavior on my 370. It kind of hesitated and the needle didn’t bounce off the rev limiter at 7500rpm like I expected it to. Is this the fuel cut?

Here’s the video - it’s the 1st one

https://my350z.com/forum/engine-and-...-limiters.html

SouthArk370Z

The FSM has a description of how rev-limiting works. Nissan has taken down many copies of the FSM but you may still be able to find one.

I doubt if any modern engines kill the spark if for no other reason than emissions. But I could be wrong.

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Quicksilvers

It is fuel cut I do believe.

gomer_110

The factory limiter is actually a throttle cut. Once you hit the ECU's cut point it "pulls back" on the electronic throttle. This is why the car seems to just fall on its face when you hit it. There is a fuel cut limiter in the ECU but from the factory it's set higher than the throttle cut so you'll never see it.

If you're tuned you can actually alter the settings for both limiters and make the fuel cut the one you hit first. Hitting the fuel cut first will give you the more traditional "banging off the limiter" that people have been used to for years. It is going to be harder on the engine though.

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Rahul718

Super helpful response

Not sure if you can take a look below, but based on what you’re saying the 370 rev limiter is different than the one in the 350z (which I was used to years ago)

https://my350z.com/forum/engine-and-...-limiters.html

Two videos... one is a “soft” limiter and one a “hard” limiter. It seems the 370 has neither of these, unless I’m mistaken

Spooler

Ever since I had the OS Giken installed I do not hit the electronic throttle cut. I always hit the fuel cut first. I am on the stock tune at the moment. I am not sure what parameters they reference to choose between fuel cut or throttle cut. With the stock VLSD, I would hit the throttle cut every time. It drove me crazy.