Smacking off the factory rev limiter isn't very good for the car. How is a 2-step different? I'm sure there is a technical answer, but figured I would ask.

 

There are numerous threads about this. Use the newbie forum and use the search button.

https://www.evolutionm.net/forums/evom-new-member-faqs-evom-rules-61/

 

Please show me where if there are threads about this.

I read everything that came up for "2 step", "two step" and "anti lag" and they were all just people asking what it was. I know what a 2 step is. My question is how is it different from the regular rev limiter. It has to be different to build the boost obviously.

 

2 step? stutter box?

 

 

I must be missing something here. I searched and read through all the posts on the first page. In the stickies I don't find anything about two steps.

Woldn't it just be easier to answer a question from time to time instead of busting everyones *****? ? Just a thought.

 

The factory 2 step for 05 is like 5.5K I believe. On my car there was no two step just the main rev limiter until I got the AEM at around 11K on the car.

The two step won't really build much boost. I don't think it is really that bad for your car to hit the two step or the rev limiter. The thing that has an ill effect is anti lag, which is purposely modifying your fuel and retarding timing so that you get explosions in your exhaust. This method will certainly build boost, but can be stressfull on the turbo.

A lot of people use anti lag, so you would have to get their input for first hand longevity issues, if they exist. All I know is that I use a 2 step and have been with 400+ passes on this car and 79K and it hasn't self destructed yet. The only breakage I have had was the driveline.

To answer the question of how is a 2 step different from a main rev limiter, there is no difference other than the rpm it engages at and the fact that once you exceed a pre set speed (i.e. 10 mph) the 2 step disengages and falls back to the main limiter.

 

I was under the impression the 2 step was there to help get the desired RPM to launch the car, but also to load the engine so you have boost. Anti-lag uses timing to build boost instead of engine load.

 

A 2 step does not put any load on the engine, the weight of your car does. You have to start slipping the clutch and rolling out to put load on your engine. You might get 1 psi or something small from hitting the 2 step alone, but nothing significant.

The main benefit of a 2 step is that you don't have to watch your tach when you launch, so you can watch the tree instead. This also will give you a much more consistent launch. Keep in mind, you don't need to go full throttle on the 2 step either, I learned this the hard way. Staying at part throttle on the two step helped me to reduce wheel spin off the line.

 

I don't know if the one on the Evo's is different, and I don't see why it would be but the advantage to a 2-step on a turbocharged car is so you do build boost without moving. If you look for an aftermarket one on any other car it's listed as a benefit or feature.

 

^^ It certainly does help build boost before launching. I'm seeing 10-12psi before I let out the clutch.

 

Hrmmm, well I need to look at my aem next time I hit the 2 step, I never really payed attention. I do know that it isn't anything near what anti lag does for you. I know on E85 it builds more than it did when I was on gas. It might have something to do with the extra fuel left over after ignition cut acting as a mini anti lag of sorts.

 

Looks like this discussion already happened and wound up in a locked thread, haha.

https://www.evolutionm.net/forums/sh...highlight=step

To sum up the linked thread (it's 6 pages of arguing back and forth, but the last page the STi guy confirms he was wrong) You do build boost off the stock two step. You don't get full boost, but somewhere in the ~10psi range which is more than enough for off the line. Anti-lag is something totally different and is something used in between shifts to hold the boost. It doesn't have anything to do with launching.


And i still don't have an answer as to if it's bad or not to be hitting it. I would imagine it can't be since it's there from the get go, but I just don't feel right revving the car and having it bounch off the rev limiter (artifical or otherwise)

 

Anti lag can be used off the line, I have seen people use it. Maybe it isn't called anti lag when used for launching? Maybe its called 2 step with benefits? It makes loud pops and is definitely different than a plain 2 step. Shall I post a picture of the aem settings?

I have engaged it briefly on my own car with AEM so I know you can use it for launching.

Anyhow, I can only tell you what my personal experience is. I have bounced off my 2 step a crap ton (400+ passes) as stated before. No damage yet. That is all I can tell you.

 

Good enough for me!