RPM Limit Cut Off

[stpetermi]

Does anyone know if the 2012 r-spec 5.0 has a cut off or shut down if you exceed particular rpm's? I am not asking about a speed limit cut off, but at any speed regardless if you are going at a slower speed or a faster speed is there a rpm limit or exceed that cannot be breached? When I drive 2010 Camaro SS V8 with manual transmission and between 6400 rpm's to 6500 rpm's the engine/rpm's will drop immediately. It's like clock work every time. Chevy (local dealer) told me that there is some kind of signal that is sent to "starve" fuel so that it cannot exceed the 6500 rpm's. The speed traveling does not matter. Anyway it would be nice to know before I go out and run my Genesis if there is such a limit for this 5.0. Again please do not share the speed limit controls. I am familiar with those. And please save the "war stories" and "urban legends" and my vehicle is completely stock 5.0. I just put my turkey in the oven and do not need anymore. It's okay if don't know I will continue to do my research and contact my local Hyundai dealer after the holiday.

 

[Potty_Pants]

No car maufacturer today in their right mind would not put safeguards in.

Honestly i havent tested.

Gun the engine and see.


Ppp

 

[GenesisCaptain]

No car maufacturer today in their right mind would not put safeguards in.

Ditto. Every car I know has an RPM governor. I don't have an R-Spec, but I would bet it has a governor at its redline.

 

[stpetermi]

thanks gentlemen will let you know my experience (gunning it) and my local Hyundai's response as soon as I get the time. Hopefully soon.

 

[scottdk]

Ditto. Every car I know has an RPM governor. I don't have an R-Spec, but I would bet it has a governor at its redline.

Correct Also known as a "rev limiter". Will shift at redline (actually a hair before) and I believe the rev limiter in park is 4,000 RPM.

 

[RSPEC429]

Be sure to slap it in the manual mode as well. Let us know if it holds gear at redline

 

[jmo51]

As I recall the fuel shut off in the R-Spec is 6800 RPM's

 

[snork]

Be sure to slap it in the manual mode as well. Let us know if it holds gear at redline

Doubt it, only a select few sports cars with manu-matics or dual-clutches even hold gear. Haven't tried personally during acceleration, but it does down shift automatically if you come to a stop in "manual" It probably gives you one or 2 bounces off the rev limiter and then will upshift.

 

[Potty_Pants]

[YOUTUBE]aDwpuWcXzTw[/YOUTUBE]

 

[DanTheMan]

[YOUTUBE]aDwpuWcXzTw[/YOUTUBE]

And he's proud of that? I'll bet that will change after he gets the bill for replacement!!

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[stpetermi]

Does anyone know if the 2012 r-spec 5.0 has a cut off or shut down if you exceed particular rpm's? I am not asking about a speed limit cut off, but at any speed regardless if you are going at a slower speed or a faster speed is there a rpm limit or exceed that cannot be breached? When I drive 2010 Camaro SS V8 with manual transmission and between 6400 rpm's to 6500 rpm's the engine/rpm's will drop immediately. It's like clock work every time. Chevy (local dealer) told me that there is some kind of signal that is sent to "starve" fuel so that it cannot exceed the 6500 rpm's. The speed traveling does not matter. Anyway it would be nice to know before I go out and run my Genesis if there is such a limit for this 5.0. Again please do not share the speed limit controls. I am familiar with those. And please save the "war stories" and "urban legends" and my vehicle is completely stock 5.0. I just put my turkey in the oven and do not need anymore. It's okay if don't know I will continue to do my research and contact my local Hyundai dealer after the holiday.

Ok gentlemen here's my follow-up: Visit to my local hyundai dealer on black Friday and posed the question to the technician regarding the "rev limiter" for my 5.0,-His answer is the rev limiter for the 5.0 is 6700 to 6800. And it's a "soft cut off". Asked him what soft is and his reply was when you hit that particular rpm for the limiter to engage it will retard the firing and give you a coasting felling v. a very abrupt almost completely off felling ("hard cut off" is retard the firing and cutting the fuel simultaneously according to this tech.). BTW-This is how the Camaro I drive acts when the limiter is engaged. He said that even in "sport mode" the limiter will engage. He also warned me that there are many after market products that can change these setting and that one unlucky 5.0 owner blew his engine using these modifications. Informed him that I am not interested in modifications but I like to be armed with knowledge.

Next, here's my vicarious experience with my own testing in an uncontrolled environment:
1. In park with a hot engine rpm at 4500 for 15 seconds no rev limiter engaged. Did this exercise pre and post hard run. Maybe I needed to hold rpm's longer in order for the limiter to engage?
2. While in "sport mode" the vehicle will definitely not hold a gear. It shifted for me at 6400, i.e. third to fourth, fourth to fifth.
3. As far as testing the limiter for engaging at 6800 I could not get there safely, only got to 6500 and I believe it could have kept going but I ran out of road. This was the with the ECS off.
4. Again this is my experience that does not mean much to anybody except my self.
My disclaimer is I am 51 year old driving for many years and have some off road race experience with cars and scooters aka motorcycles. I can be a very aggressive driver if needed to get me out of an unsafe situation. But, safety is my number one consideration, that's how I got to 51 without killing my self. Having said all that this vehicle is definitely a nice cruzzzer

 

[RSPEC429]

Good info! I sent you some reps!

 

[Crusty Old Shellback]

Yep, the car will shift for you long before it reaches the REV limiter, even in manual shift mode.

My Pontiac G8 would bounce off the REV limiter when in manual mode and not upshift. I suspect the Camaro will do the same. It all depends on how the car/transmission is programed.

A REV limiter will do several things to help protect the engine. It will randomly remove the spark from the cylinders to keep the engine from over reving, it can reduce the amount of fuel to the engine or retard the timming.

 

[snork]

I tried it out for myself too...the car automatically upshifted at about 6400 rpm. Not even close to the redline. Didn't even bounce off the rev limiter. My old base model Subaru Legacy (non-Turbo) at least gave ONE bounce off the limiter before shifting Might as well just leave it in auto

 

[Aquineas]

With regards to the "hard" cutoff, not that many (or any) of us have forced induction engines in our cars, but it seems to me that a turbocharged engine that has its fuel cut off suddenly would create an extreme lean situation. I guess if they cut the spark at the same time they cut the fuel...

 

[stpetermi]

I tried it out for myself too...the car automatically upshifted at about 6400 rpm. Not even close to the redline. Didn't even bounce off the rev limiter. My old base model Subaru Legacy (non-Turbo) at least gave ONE bounce off the limiter before shifting Might as well just leave it in auto

Agree, not sure what the point of the auto stick or sport mode is for? Basically if you move the selector to sport mode and hold your foot down on the gas the vehicle will do all the shifting for you.

 

[stpetermi]

Ok gentlemen here's my follow-up: Visit to my local hyundai dealer on black Friday and posed the question to the technician regarding the "rev limiter" for my 5.0,-His answer is the rev limiter for the 5.0 is 6700 to 6800. And it's a "soft cut off". Asked him what soft is and his reply was when you hit that particular rpm for the limiter to engage it will retard the firing and give you a coasting felling v. a very abrupt almost completely off felling ("hard cut off" is retard the firing and cutting the fuel simultaneously according to this tech.). BTW-This is how the Camaro I drive acts when the limiter is engaged. He said that even in "sport mode" the limiter will engage. He also warned me that there are many after market products that can change these setting and that one unlucky 5.0 owner blew his engine using these modifications. Informed him that I am not interested in modifications but I like to be armed with knowledge.

Next, here's my vicarious experience with my own testing in an uncontrolled environment:
1. In park with a hot engine rpm at 4500 for 15 seconds no rev limiter engaged. Did this exercise pre and post hard run. Maybe I needed to hold rpm's longer in order for the limiter to engage?
2. While in "sport mode" the vehicle will definitely not hold a gear. It shifted for me at 6400, i.e. third to fourth, fourth to fifth.
3. As far as testing the limiter for engaging at 6800 I could not get there safely, only got to 6500 and I believe it could have kept going but I ran out of road. This was the with the ECS off.
4. Again this is my experience that does not mean much to anybody except my self.
My disclaimer is I am 51 year old driving for many years and have some off road race experience with cars and scooters aka motorcycles. I can be a very aggressive driver if needed to get me out of an unsafe situation. But, safety is my number one consideration, that's how I got to 51 without killing my self. Having said all that this vehicle is definitely a nice cruzzzer

After doing some more research as I am pretty ignorant to this whole business of RPM governor or limiter and talking with another technician (not hyundai tech) there is a pretty good link explaining "two step" rev limiter. It sounds like the 5.0 may have a two step but I can not confirm as I did not get a chance to hit the 6700/6800? Anyone out there can your verify that the 2012 5.0 is a two step rev limiter? Thanks
http://www.enginebasics.com/EFI Tuning/2step rev limiter.html

 

[snork]

Agree, not sure what the point of the auto stick or sport mode is for? Basically if you move the selector to sport mode and hold your foot down on the gas the vehicle will do all the shifting for you.

Yeah. No point. I live on top of a hill, so the pretty much only time I will ever use the manual mode is when it gets slushy/icy in the winter time so I can hold a low gear and engine brake down the hill.

 

[the M5 beast]

My M5 would hit the limiter and lose all power till the rpm's dropped and then would regain all it's power. As for the video of the kid blowing his motor it was probably caused by the oil going to one side or the other of the oil pan so the oil pick up on the oil pump was starved for oil. Doubt it was caused by over reving the engine.

 

[stpetermi]

My M5 would hit the limiter and lose all power till the rpm's dropped and then would regain all it's power. As for the video of the kid blowing his motor it was probably caused by the oil going to one side or the other of the oil pan so the oil pick up on the oil pump was starved for oil. Doubt it was caused by over reving the engine.

I agree and we have no idea by viewing this video what type if any modifications the vehicle may have? Or at least I do not know if there are any mods.