is it bad to hit the rev limitor ????

[sr20d3t]

earlier tonight i was coming home from 101 and a integra pulled up to me; he keptd revving up and pullin to the side of me so i punched it in 4th gear ; he keptd up pretty good; but then i hi the damn limitor and i was like 'wtf' i was staring at the rpm it was still climbing but i hit max speed (180 km/h) and i look back i saw smoke shootin out; i didnt expect to hit my top speed that quickly ; anyhow it was a integra type r ; i was bout 1 car ahead of him the whole time until i hit my top speed and he flew by; my question is that can anything bad happen to my motor ? i held it for about 2 secs and let off the gas; the car didnt stall or shut off; but when i let off the gas black smoke came out; but everything seems to be running fine right now so im assuming everything is ok; but has this happend to anyone before ? is it seroius ? thanks for any input.

[sepulchral]

when you hit rev limiter your car will sometimes shoot flames or puff black smoke because of the richness its running at. your motor's fine, ive seen sr's that have hit rev limitor from miss shifting or people doing stupid crap atleast twice a day for years on end. be careful when you race..

[Twinkie]

i do it all the time with out noticing...i always redline for a coupleseconds without noticing before i switch gears.

in the long run, im pretty sure its bad for your engine. but nothing serious has happend.

although, my coolant hose broke (but i recently fixed it)...and my turbo doesnt perform as it did back at the begining of my sr20det days.

[TurDz]

when D1 drifters are drifting and you hear the sound of their engine, are they constantly holding the throttle and bouncing off the limiter?

[ICKY]

Some D1 drivers back off the throttle a little bit when they hit the rev limiter, others go full/hold their current throttle position. I assume it wouldn't do damage as long as you don't do it all the time.

[Tweaker]

I don't see how it could be bad for the engine? The rev limiter is there to stop you from over revving, so how could it do any damage? What's the point in a car having a limiter if it’s going to do damage your engine if you hit it? Manufacturers put limiters at a certain point for a reason! Don't constantly hit the rev limiter if you can avoid it.

[sr20d3t]

whew; thanks ! and happy new years

[sykikchimp]

actually, sounds like you hit the fuel cut at ~115? (SR right?) Fuel cut is like a *BBBooooooggggggg* then you have to slow down a bit, then you can go again... rev limiter is more of a hard Shudder where as when you back of that rpm, it stops.

Do some searches on removing the speed limiter.

[s0ldats]

yeah rev limiter is hit in the lower gears unless you have already removed your speed limiter. if you don't care about codes and etc, just unplug the 5th gear sensor on the tranny.

[twitchy]

how do you redline for a few seconds without noticing


in effect the rev limiter is the safest level you can go before causing damage
im sure your engine is fine but dont do it all the time

[nistech]

i think he hit the speed limiter also

[Ian]

i personally only have the 5th gear limiter, no speed limiter...when i hit mine it feels like my intercoolerpipes came apart...it's an awful feeling to happen at around 135

[duey]

someone correct me if i'm wrong but isn't the REV limiter is a fuel cut type limiter (which can be damaging causing the motor to run lean for that split second), and the SPEED limiter is a ignition type limiter (hence the exhaust shooting out flames on cat-less cars)??

[mr_240sx]

yeah rev limiter is hit in the lower gears unless you have already removed your speed limiter. if you don't care about codes and etc, just unplug the 5th gear sensor on the tranny.
what kind of codes do you get when you unplug the speed limiter? is it as easy as just going under the car and pulling a plug off?

[mrmephistopheles]

no codes.
One can safely disconnect all sensors but the reverse switch without ill effect.
Neutral switch, 4th gear and 5th gear position sensors are not necessary to the operation of the car, and their abscence will not be noticable.

[NI_YON_Zenki]

When you hit the limiter, black smoke will kick based on yah fuel richness and the sediment buildup from within the exhaust piping, as well as the temperature of the muffler. What has already been mentioned. Anyways. . . . Don't make a big habit of it, but if you do, just be aware of your throttle timing, so you don't endup catching that limit again,or too often.

[mr_240sx]

no codes.
One can safely disconnect all sensors but the reverse switch without ill effect.
Neutral switch, 4th gear and 5th gear position sensors are not necessary to the operation of the car, and their abscence will not be noticable.
to disconnect those sensors, can i disconnect them while the car is on the ground? or do i need the car on a lift?

[vvtisupra]

i knew someone that blew their motor from bouncing off the rev limiter on a ka tho

[WILDACEX187]

yea but i think wat the original post is about speed limiter which on a sr i believe is 135. my friend has a msd 6A ignition on his a86 and adjusted his rev limiter to 100 rpm below his redline so that he gets a ignition cut instead of a fuel cut which is safer. is this possible to do on a sr? i dont think msd ignition can be had on sr's but is there something else?

[sr240mike]

Sr speed limiter is around 110-115 mph. The rev limiter on an sr cuts spark and not fuel. If you're really worried about it get some rocker arm stoppers, its a good $75 investment in saving your motor from bouncing off the rev limiter. I have some extra daughterboards for an sr to remove the speed limiter and to change rev limits if you want. Pm me if you want one.

[fliprayzin240sx]

Well depends on how u hit it too. Just revving it, i dont see you breaking anything rite away. Accidentally downshifting from 5th to 2nd instead of 4th...i see rocker arms flying and bent valves. Gotta remember, rev limiter is electrical, not mechanical. Somethings gonna give.

[sr20d3t]

yea i think it was actually the speed limiter i hit ; yea i have a blacktop sr in my s13; basically i was in 4th gear at WOT and i noticed i hit my top speed but i was no where near redline (thats wut made me hestitated for a bit to let go of the gas); i didnt know 4th gear can max out so quick; but now i know =X

[mr_240sx]

what actually happends with my redtop is that i can rev to anything i want in 4th gear(usually no more then 7K to be safe), and usually 7K is about 120mph or something around that, and when i shift into 5th and release the clutch, its when the speed limiter kicks in because its more then 110-115 mph. :bash:

[Ian]

LIMITOOORRRR!!!!

*raawrrr...smashes building*

it's a combination of godzilla and fuel cut

[XxJaPxOxNeEs23xX]

i hit rev limitor on my ka all the time. it sounds hot. hahaha. just hope it doesnt blow one me one of these days. and yeh it hit hard wen i shifted from 3 to 2nd trying to go to fourth, thats wen i thought it was gonna blow up. but just hitting rev limitor from reving high i dont think ti does too much damage.

[Ian]

i dont understand how people can upshift incorrectly? i have a B&M and i still dont do that...

[mr_240sx]

i dont understand how people can upshift incorrectly? i have a B&M and i still dont do that...
i hear ya man, i got a B&M short shifter and never miss a shift and never missed a shift before i had the b7m either though.

[WILDACEX187]

Sr speed limiter is around 110-115 mph. The rev limiter on an sr cuts spark and not fuel. If you're really worried about it get some rocker arm stoppers, its a good $75 investment in saving your motor from bouncing off the rev limiter. I have some extra daughterboards for an sr to remove the speed limiter and to change rev limits if you want. Pm me if you want one.

u sure the rev limiter on a sr cuts spark?

[duey]

u sure the rev limiter on a sr cuts spark?

:werd: thats what i'm wondering. when i hit the speed limiter my car will shoot out a nice fireball which indicates a fuel cut for sure. But when i bounce off the rev limiter = no flame job, which leads me to believe it's a fuel cut-off NOT a spark cut-off.

[XxJaPxOxNeEs23xX]

i dont understand how people can upshift incorrectly? i have a B&M and i still dont do that...


i dont either, hahaha, ionno how i did that. for some reason the shifter was hard to put into fourth so i jamed it and it went into second.

[meatish]

January 4th: Gain entry to SR20D3t's house. Commence beating occupant with pieces of furniture.
January 10th: Furniture supply exhausted. Drag body off into woods.
People like you give everyone else a bad reputation. Granted, an intelligent discussion came out of this, but did you really have to tell us your adventures in obnoxious street racing? Go to hell.

[90RS13]

People like you give everyone else a bad reputation. Granted, an intelligent discussion came out of this, but did you really have to tell us your adventures in obnoxious street racing? Go to hell.

wow...... I'm glad I've never had to ask you a question.

[iyceman]

I don't see how it could be bad for the engine? The rev limiter is there to stop you from over revving, so how could it do any damage? What's the point in a car having a limiter if it’s going to do damage your engine if you hit it? Manufacturers put limiters at a certain point for a reason! Don't constantly hit the rev limiter if you can avoid it.

Well it depends on how the rev limiter works. I don't honestly know (I'm still learning these cars) how Nissan tackles the issue, but sometimes manufacturers cut the fuel instead of cutting the spark. If you cut the fuel, the engine will go super lean for a moment, and can torch shit pretty easily (earlier Miatas have an issue with this). If you cut the spark it's much less of an issue. If anyone can educate me as to how it works in an S14, lemme know, I love learning new shit.

[cr00k_lyn]

Anybody found out yet? Is it cutting spark or fuel?

[pignosecoupe]

One can safely disconnect all sensors but the reverse switch without ill effect.
Neutral switch, 4th gear and 5th gear position sensors are not necessary to the operation of the car, and their abscence will not be noticable.

With my KA24E is there anyway to do this? I dont know if it is different on the SR setup. My car is up on a lift now, so if I could do this, it would be awesome.


Searching helps, I guess. :duh: Wires on ECU: Yellow w/ green strip. *8th wire from the right. Cut. no more revlimiter on KA. Good to know.

[DoriftoSlut]

Why would you want to get rid of your revlimiter?!?!!?! Both rev and speed cut spark. nissan isn't stupid to cut fuel.

Kepp your damn revlimiter, that stops you from over revving. And Rocker Arm stoppers stop your rocker arms from flying off the valves and floating them into your pistons at High RPM. Solid lifters would be cool. Hydraulic ones are kinda suckyyyyy.

[Sanchi]

When you do a dyno dont they rev it till it cuts off???

[timmybgood]

the rev limit is designed to keep you from killing you engine

the speed limit is designed to keep you from killing yourself(and others)

a simple solution for the removal of the speedlimiter is to route one of the wires for the speed sensor(on end of tranny) up inside the cabin and connect it to a switch. that way you still have a functional speedometer, and when you need to go over 120(ish..)which is where the speedo runs out and the speed limiter kicks in, you can just flip a switch and keep on goin.

[s134]

hitting the rev limiter, is as bad as keeping your rpms that high... that;s the only bad thing it does to the motor, now the violent shake that the 240sx rev limiter cuases may affect togher parts suck as tranny mounts and what not

[sdtouge]

ive seen sr's that have hit rev limitor from miss shifting or people doing stupid crap atleast twice a day for years on end. be careful when you race..



no revlimiter will save you from over reving if you mishift. how could a computer stop your transmission forcing your crank into 11k rpms?

[sr240mike]

Im almost 100% positive that fuel is cut at rev limit, and not spark. No fuel = no ignition. This is why most 240's I see at drift events don't throw huge fireballs when bouncing off the rev limiter.

[chokudoriS13]

no revlimiter will save you from over reving if you mishift. how could a computer stop your transmission forcing your crank into 11k rpms?


Yep, was just going to say this... Inertia and the laws of physics are no match for a computer :D.

[DoriftoSlut]

Im almost 100% positive that fuel is cut at rev limit, and not spark. No fuel = no ignition. This is why most 240's I see at drift events don't throw huge fireballs when bouncing off the rev limiter.
Haha ends up we are both right... first revolution, cut fuel, next one spark. Then fuel again, then spark, then fuel, then spark, you get the idea.

[BobbyBoy]

Where did you find that info at?

[NZO]

I was under the impression that it is fuel cut only for obvious reasons.

[ledzeppelin240]

You increase the chance of valve float, unless it is a built engine that is going to be able to hadle the abuse you are hurting the engine, that is the absolute furthest point that the Nissan Engineers wanted that engine to rev.. Think about it next time your bouncing off the limiter, drop a valve and all hell breaks loose...

[mistaanime]

Get apexi RSM...and it will do wonders

[420sx]

just stomp the motha fuckin throttle till you hear "nang nannagnang nang annagnang" sound. its there so you think "maybe i should shift up? ah, fuck it"

[SHIFT_control]

I've done that once before..... shitfer wouldn't go into 4th so I forced it and it went into 2nd. Very wierd its done that to me twice. I've got the cheap-ass OBX short shift BTW. Trans is going out also, maybe that explains it.