do i have a rev limiter?

[eclipse_16g]

ive raced alot, whether on the streets or at the track, and i know that cars usually dont go deep into redline without hitting a rev limiter. i've brought my gsx up to 7500 rpms without hitting a rev limiter does this mean that i dont have one?

 

[xe0]

ive raced alot, whether on the streets or at the track, and i know that cars usually dont go deep into redline without hitting a rev limiter. i've brought my gsx up to 7500 rpms without hitting a rev limiter does this mean that i dont have one?

Unless it's been modified in someway, all factory dsms have rev limiters. An easy way to test this is to put the transmission in neutral and open the throttle slowly until you hit your limiter. If you don't have it kick in by 8000rpms, it's a good assumption it has been modified since 7500rpms is the stock rev limiter.


Adam

 

[turbotalon1g]

I believe Fuel cut is 7600rpms, but go outside and put your foot down for while until it stops.

 

[jrohner]

The rev limiter is 7500, although there's no reason to rev it that high unless it has a lot done so it actually has power that high in the revs.

 

[eclipse_16g]

but if the previous owner did do some computer work and put the rev limiter to the point where i can damage something would it be bad to just rev it up in neutral all the way?

 

[xe0]

but if the previous owner did do some computer work and put the rev limiter to the point where i can damage something would it be bad to just rev it up in neutral all the way?

That's why i said to stop at 8000rpms. Your not going to get valve float at 8000rpms in neutral with no load on the engine. Don't just mash the throttle, give it part throttle until it rises up to 8000 and if it makes it there let off. This really is a simple issue bro.

Adam

 

[No_Skillz]

Wow what a bad idea. Never rev your car excessively (to me, that means "at all") in neutral.

Stock DSM has a rev limiter at 7.5k. You could have been at 7490 and avoided it, your tachometer might be off by a few percent, or you have sick mods you don't know about.

It shouldn't matter either way since you should not be revving past 7.5k on a stock valvetrain.

 

[xe0]

Wow what a bad idea. Never rev your car excessively (to me, that means "at all") in neutral.

Stock DSM has a rev limiter at 7.5k. You could have been at 7490 and avoided it, your tachometer might be off by a few percent, or you have sick mods you don't know about.

It shouldn't matter either way since you should not be revving past 7.5k on a stock valvetrain.

i'm curious to know why you think that's a bad idea? Considering Mitsubish's engineers thought the engine could rev all day up to 7500rpms. How would you go about determining your rev limiter?

Not saying reving to the rev limiter is a good idea but for different reasons then you. The stock cams stop making good power long before 7500rpms, and the amount of wear at 7500rpms is obviously greater then say, 6500rpms.

But his question was does he have a rev limiter, not is it a good idea to rev to 100,000,000rpms. The easiest way to determine that is to...hmmm. rev?

Adam

 

[No_Skillz]

i'm curious to know why you think that's a bad idea? Considering Mitsubish's engineers thought the engine could rev all day up to 7500rpms. How would you go about determining your rev limiter?

Not saying reving to the rev limiter is a good idea but for different reasons then you. The stock cams stop making good power long before 7500rpms, and the amount of wear at 7500rpms is obviously greater then say, 6500rpms.

But his question was does he have a rev limiter, not is it a good idea to rev to 100,000,000rpms. The easiest way to determine that is to...hmmm. rev?

Adam

You want to bring an 18+ year old motor past redline in neutral. Think about this for a second.

In case you don't have prior experience with this, it's the fact that there is NO LOAD on the motor that is the problem. This will contribute to all sorts of vibrations and harmonic stresses that are not present when the motor is under load (like pulling the car).

 

[xe0]

You want to bring an 18+ year old motor past redline in neutral. Think about this for a second.

In case you don't have prior experience with this, it's the fact that there is NO LOAD on the motor that is the problem. This will contribute to all sorts of vibrations and harmonic stresses that are not present when the motor is under load (like pulling the car).

While I agree that there will be different vibrations and harmonic stresses in neutral vs with load, I disagree that this would be worse. Take the fact that he won't be building any boost in neutral vs full load revving to the rev limit, what is going to have high cylinder pressures and bigger chance to go lean and cause real problem?

We can agree to disagree however, as your point is taken and revving in neutral is stupid.

Adam