When I rev my car in neutral or park, there seems to be some kind of a rev limiter stopping it from going to redline. It's at about 4k rpm. If i'm in D and actually moving though, that 4k limiter isnt there. Basically the 4k limiter is there if my car is NOT rolling. I'm pretty sure its some sort of a safety feature, but i just wanted to clarify. I have an 05 Cavy auto(obviously).
I would think it is a safty divice... why would you want your engine running 4k + rpms with out anything ingaged? that cant be goo for the engine but hey im just a newbie to some people so i guess dont really trust my word.
yes thier is a rev limiter in park and neutrall at 4k rpm as far as i know you can not elimnate it with out having the ecu reprogramed because it works with the coil packs. and if you ever tri to hold it at 4k you will notice after a second or two it will start to drop cylinders so you drop blow it up. easyist thing it to buy a 5 speed
Why are you revving that high in P or N anyway?
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It's there so stupid people don't blow their engine
Ian Dodson wrote:yes thier is a rev limiter in park and neutrall at 4k rpm as far as i know you can not elimnate it with out having the ecu reprogramed because it works with the coil packs. and if you ever tri to hold it at 4k you will notice after a second or two it will start to drop cylinders so you drop blow it up. easyist thing it to buy a 5 speed
You can remove it temporaraly but you will throw a CEL.
You'll probably throw more than just a CEL...
get going about 30 MPH and place in N and drop the hammer, It will hit the rev limiter at 6250 RPM, or at least that is how the LD9 work
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Kevin Hamilton wrote:get going about 30 MPH and place in N and drop the hammer, It will hit the rev limiter at 6250 RPM, or at least that is how the LD9 work
Thats because is already in motion. While he's idle, the computer won't let him do that.
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Why in Gods name would you want to do that anyway? You have an AUTOMATIC!!! There is no need for revving that high sitting stationary in your car...unless you plan on doing a neutral drop, and that just isn't smart either...you cant really launch an auto like that. Put the thing in D and go...
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ok,
most motors especially gm motors don't like to be revved past 4k wothout a load on the crank. you begin spinning crank bearings. the reason this happens is because when the engine is under load and you spin up high you have that positive load on the crank to help keep everything in place. when you are in neutrial or park the only load on the motor is the spinning of the torq converter, flexplate, and assecories(alt, power sterring, ect.) and this is not enough to maintain the stability of the rotating assembly at high rpms.
thats why that feature is in place, to make the motor last longer.
and for the guy that does 30mph and puts his car in neutrial to rev it up and shift back into gear, please stop, you make baby jesus cry
NUTCASE . wrote:ok,
most motors especially gm motors don't like to be revved past 4k wothout a load on the crank. you begin spinning crank bearings. the reason this happens is because when the engine is under load and you spin up high you have that positive load on the crank to help keep everything in place. when you are in neutrial or park the only load on the motor is the spinning of the torq converter, flexplate, and assecories(alt, power sterring, ect.) and this is not enough to maintain the stability of the rotating assembly at high rpms.
thats why that feature is in place, to make the motor last longer.
and for the guy that does 30mph and puts his car in neutrial to rev it up and shift back into gear, please stop, you make baby jesus cry
hahahaha I'm starting to like you already.
Very well put by the way.
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NJHK (The JBO Negro) wrote:NUTCASE . wrote:ok,
most motors especially gm motors don't like to be revved past 4k wothout a load on the crank. you begin spinning crank bearings. the reason this happens is because when the engine is under load and you spin up high you have that positive load on the crank to help keep everything in place. when you are in neutrial or park the only load on the motor is the spinning of the torq converter, flexplate, and assecories(alt, power sterring, ect.) and this is not enough to maintain the stability of the rotating assembly at high rpms.
thats why that feature is in place, to make the motor last longer.
and for the guy that does 30mph and puts his car in neutrial to rev it up and shift back into gear, please stop, you make baby jesus cry
hahahaha I'm starting to like you already.
Very well put by the way.
what he said. lol
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Ian Dodson wrote:if you ever tri to hold it at 4k you will notice after a second or two it will start to drop cylinders so you drop blow it up
You don't speak too much English, do you?
You have to get up to 20 mph before you can rev it fully in neutral. I've been through a lot of trannys.
it's called a standing rev limiter, it's there for a reason. stated above is a good explanation of the load on the engine not being there.
if you're curious as to why it's there, it's now been explained.
if you want to remove it so you can have a fart cannon revving contest with a bunch of import kids or show off for some high school friends.... don't... that's why people like myself look poorly upon a majority of cavis in my area.
hope i'm not coming off as too much of a jerk.
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