Is there anyway I can bypass the rev limiter?

 

HP or trifecta tune

 

sorry I'm a noob to all of this I used to own a 600whp DSM

what do you guys use for a tuning system

 

Is there a point to removing the rev limiter? isn't it there so the thing doesnt assplode? dont the cars stop making HP after like 5500 or whatever it was?

 

There is moar power above 5.5k, but redline is closer to 7k already 6.8k I think. Unless you have bolt ons/tune spinning it out won't do you any good.

 

Depends on if hes auto. They make the autos shift lower (like 6300)

 

ok was wondering that too.

 

sorry guys its a 5speed and I was just wondering cause it just seems really short

 

So a 2.4L 5speed. Umm, HPTuners will fix that.

 

my redline is 6750.

regardless, raising the redline on most cars is, in and of itself, useless.

for it to be worthwhile, you basically need to cam the engine so that it makes power higher up, in which case, you THEN raise the redline so that it can be in the range that it makes power in.

IIRC, it's not the redline thats the issue, it's that the transmission shifts, and that makes sense.

forgive me for flaming, but i don't see how one could build a 600 horse DSM (and keep it from blowing up) and in the same thread ask about why the redline is where it is.

 

My car redlines at 6500 if left in d. If in "I" or "L" 6800. And its an 08 auto.

With the vvt system there's power to be had uptop.

 

IDK where you are getting your information from but many people have proved from dynos that there is power to be made from bumping the limiter up. I gained 6whp going from 6600 to 6900.

And he just said he has a 5 speed so this is clearly wrong also.




OP I would suggest investing in HP Tuners, if you know how to tune DSM's you'll have a good head start in the ecotec world. There's a lot of good information on there forums to learn how to tune. Or you can get a Trifecta tune, it won't be quite as good as the HPT but it's much cheaper and definitely worth it.

 

don't take this wrong, but yeah, i understand the little bump in power, but it's not really an effective power gain, in and of itself.

 

If the engine can rev higher and make more powder doing it then its not only effective but will help with shift recovery etc...

 

Shift recovery is key. You have to figure out if you make more power in higher revs or in the mid at the beginning of shift

 

It is completely an effective power gain. As long as power doesn't start dropping off, like it does on a stock turbo ss/tc, it is 100% better to hold the gear out til you stop making power or come close to the limiter. You will also see the rev's upon shift higher, thus again keeping power up compared to a lower rpm (6500 vs. 6900) shift. I'm not taking what you said wrong at all, you are just simply incorrect and have no right to "flame" this guy.

edit: Just realized these guys ^^^ just talked about it, but same idea.

 

Ummm.... you must not no your cars, my dsm did not have a rev limiter and would go to 8000rpm and I dont wanna mess with the gearing cause there nice numbers I just need more rpm solution delete rev limiter.... I know ALOT about building cars, I just dont know **** about newer 2000+ years

 

best way to bypass the rev limiter is to put it in 1st at 100mph lol

 

Eagan as in MN?

 

Id never want to rev a stock 4g63 (6 or 7 bolt) to 8 grand with or without a load on the motor! And deleting the rev limiter isnt really a good idea. Bumping it to a higher rpm will do just fine.

 

I don't agree at all. the only benefit i can see is that on my stock 2.4, i couldn't hit 60 in second gear without the limiter cutting in, so, if you only cared about 0-60, then it may help.

other that, i cannot believe in a significant power increase between 6750 and 6900.

now, if we are talking about 7500-8500 rpm, different story, but i don't see any huge improvement 150 rpm will get you on a gasoline automobile engine.

that all said, there is NEVER a good reason to have no limiter on a street car. even if you would never intentionally over rev the engine, there is always the chance of a panic situation in which the driver misses a shift and hits first rather than third and math puts the engine at like eleven grand, that fuel cut off may be the only think that stops a potentially dangerous situation.

 

It is clearly worth running out to 7K. See my dyno sheet below.

 

Who said raise it 150 rpm? You can easily rev to 7000 on a completely stock engine, very safely. Say most people shift around 6650, instead shift at 7000 , limiter being 7050 or 7100. That's 350 rpm bump in overall power (say only 5 whp) but 10-15whp gain once your in the next gear. It's a pretty simple concept.

Also our cars hit 60 in second gear with the F23.

The more you talk, the less I think you actually know. A rev limiter WILL NOT help anything in the event of a missed shift, hitting first instead of third. A rev limiter will stop fuel delivery to ensure an engine does not see high rpms UNDER A LOAD. Not when you miss a shift.


edit: And here's my dyno to also prove it. This is with a lot of mods, but still proves the point there is plenty of power to be made up there.

 

is that a stock 2.4? if so, that's pretty impressive.

 

okay, i will agree that just about no one would shift at the limit, if only because it doesn't make sense to bounce the car off of the limiter.

as far as the F23 doing it... it should, yes, but unless my speedo reads way slower than I am actually going, my car hits fuel cut off at about 58.

as far as the limiter cutting fuel under load, load has nothing to do with it. at all. the car will cut fuel at the preset RPM or higher. actually, IIRC most modern cars cut fuel and spark, but that's not really the issue.

the shift comment was based that most cars ( i never tried this in a cobalt) will cut all fuel causing the car to shut down if the RPM limit is exceeded by a large amount. in other words, it will shut the engine off. which, in the case of a high RPM shift from 4 to 1 would probably be the only chance you would have of still having an engine were that to occur.