Besides an ECU upgrade, what else can be done to raise the red-line?

 

comments, anyone?

 

uhmm.....honestly, i dont think there is anything we can do. ecu is the only way. or maybe go all n/a and just redline that sucker!

 

i don't see the point of that, cause on our cars power band drops off at around 5500, so when u punch it anytime above 5500 u can't really feel the power.
the only thing that i want taken off is the gov, so i can go past 120.

 

Can't help on the rev limiter deal, but

Check the FAQ's you can take the speed limiter off of the GXE's.

Or ask mzmtg

 

I would remove the gauge bezel and put some white-out on the red area.

 

.

 

lolol

 

..........

 

ECU governs the engine speed. There is no way around.

 

in that case, you are wrong. so are you telling me that if we go n/a replace the pistons to higher compression, and change the rods, or what not, it wont help at all? when all of us race, many of us shift right before redline or maybe even right on redline. if you go na, your motor will get stronger, and you will get more ponies. if you dont see a point of going n/a on our motors, then why do we do it?
oh and besides, his question is how to raise the rev limiter, i think going n/a allows you to do that.

 

What?????????????????

 

I was thinking the same thing. I think he's talking to us in code.

 

Aren't our engines NA to begin with?

Me <--- Confused


Oh, and don't give up that well-kept secret of white out either. I've gotten my car up to 7500rpms until it hit some of the red area by using white out.

 

Im sure theres a piggyback solution tho..

 

maxima98vspec was talking about a stock maxima engine, Maximus95 was thinking that maxima98vspec thinks there no potential for the max engine to make power past 5500, OOH let me be the first to say, It can . . . . not stock of course

 

maxima98vspec is right. There's no point to a raised rev-limiter if you don't have the MEVI or DE-K VI.

 

well in that case if ur going to get the pistons and the internals done then it would help but im still no going to let my RPMS go past 7500 or 8000 unless i had the forged crank and with that u would be safe to rev past 8000 easly.
we just need more performance part to be talking about seriouse things like that. i mean all we can really do it , intake y pipe, catback headers, udp, flywheel, ecu on some of us and then streight to FI, but if u look at hondas and stuff they have alot more parts to work with.

all im trying to say is we need more performance mods, and then we'll talk about raising the rev limiter.

 

maxima98vspec, why are you saying there's no point to raising the rev limiter? I'll agree that there is no point if you stick with the mods you've listed, but there is one very important mod you seem to be forgetting: the MEVI. From what I've heard, to truly take advantage of the MEVI you NEED a raised limiter.

 

I don't know if you're an idiot, or just plain ignorant. Many ppl on this site have a raised rev-limiter and you don't need to go all-motor to take advantage of it. Stop spouting misinformation and do a little research. Your arguement makes no sense...

 

The reason a 4th gen maxima's power drops off so badly after 5.5K rpm's is because of the intake manifold design. It has nothing to do with the cams, pistons....

To make real high end power a different intake manifold is needed like the DEK's or MEVI. Then it makes complete sense to raise the rev limiter. I have seen 7200 rpm's a few times a day for the last year on my 120k mile VQ30 with no problems at all.

Saying "going NA" makes no sense at all. I think your are trying to say "all motor", as in upgraded internals. An NA set up is just bolt ons.

 

Alright, well say i did the mevi, what would have to be done to raise the limit?? I mean, its not going to raise itself after the mevi is installed right??? would i have to have the ecu reprogramed or what? BTW, i have an SE so the speed limiter is not an issue

 

The only way now to raise the rev-limiter is an ecu upgrade. And I believe only JWT provides the raised rev-limiter, someone correct me if I'm wrong. The MEVI won't raise the limiter by itself. I have the MEVI and would like the ECU upgrade, but I don't have $600 for it right now.

Mooney

 

the only thing that you can do to raise the rev-limiter is to have your ecm reprogrammed. there are no "piggy-back" systems for the maxima that would raise the red-line, and there's no special wire to cut somewhere thats going to raise your rev-limiter. you need an air/fuel map from the computer telling the engine what to do with those extra revs.

 

I rev to 7500-8000 all the time and our cranks are TRIPLE FORGED stock.

 

 

I wonder if that only works on the I30.....

 

we'll Im not sure exactly how it works, but couldnt you...?

This is gong to be broad.

The ecu gets a signal that tells it what rpm the engine is running at. This signal then goes to the tach. So, Im thinking that a certain voltage in the signal means a certain rpm. If we put a resistor in front of the ecu to turn down the voltage(thus making the ecu "think" it is at a lower rpm), wouldn't the limiter be faked out?.....the only problem would be getting too big a resistor and blow the engine and also the tach would be inaccurate. Also we could put the resistor on a switch so that once you hit the limiter, u flip the switch, the voltage is dropped over the resistor.

...or whatever....just a theory

 

Wouldn't that cause every other sensor or component that is RPM dependant to start doing crazy things? If you don't know how to do it EXACTLY, I suggest you don't do it at all. Just a suggestion.

 

a friend gave me a number to this one guy who said he could raise my rev limiter to what i wanted but i see no need in doing so since im not planning on getting a mevi anytime soon so i havent tried it yet. the way that guy does it was "flash" my ecu and do some other stuff to it which im not sure.

 

Our ECUs aren't flashable so that idea just flew out the damn window.

 

I talked to stillen on friday and they said they have released the VQ PRO but not for the maxima yet they said they have the one for the g35 and Z then specs and we were the last on the list mabe if we all called they would know how bad we all want this.

 

JWT ECU upgrade is the way to raise the rev limiter, SE 5sp don't have a top speed limiter...

 

Another problem would be that the ECU would run a fuel map for a lower RPM right?

 

It's good to see that your thinking, but that idea is flawed in so many ways I don't know what to say.

 

From what was told to me by jet proformance techs......the advance timing and air/fuel ratio is felt all thru the power band and not just at WOT...so I think the ECU is progammed at low rpm as well as top rpm..........by the way I got my ECU reprogammed at Jet.....I have no regrets....I sent it in on Mon. got it back Wed morning...An upgraded ECU is best if you have modds installed on your max.....I have a SE 5sp.....with catback exhaust, y-pipe, pully, intake, so my car isn't being held back by my stock ECU.......if you max is stock you won't feel a big difference with an upgraded ECU ......you upgrade your ECU last after all your mods.....not first

 

Actually people that have gotten the real ECU's (JWT, Technosquare) have said that if they could do it all over again their first 3 mods would be intake, y-pipe, and ECU.

 

I bet $1 that your just repeating what a JET rep told you over the phone or an email.

 

I don't even know where to begin......... the tachometer doesn't control the ecm. the very thought of that is crazy. our tachs are known to be off by as much as 300 rpm's at redline. the ecm gets input from the crank position sensor and the camshaft position sensor. these tell the computer where the motor is at as far as rpm's go. even if your theory was somewhat plausable (which it's not) it still doesn't explain how if the engine would even run. Say the engine is spinning at 7000 rpm's and you want to tell the ecm that its only turning at 5000 rpm's. how in the he!! is the ecm going to keep the motor running when its only sending out a spark signal for 5000rpm's? plain and simple it couldn't. like I said above in post #24 you need a air/fuel map and a spark map for those extended revs. no tricks. no resistors. no black magic. just an ecm reprogram. and a little common sense.

 

what do you mean our ecm's aren't flashable? then what have jim wolf and g-force/technosquare been doing all these years? I think you need to do some research.