Jestr anti-lag
You dont have any anti-lag system in your USDM evo. But he will set your Stationary Rev limit so you can use that for launch control/2-step. I think John sets it to 5500 or 6000 RPM
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Anti lag and staionary rev limit = two step
But what I'm sure you have is a stationary rev limiter (Step one) and perhaps a moving limiter for flat foot shifting (Step two). Keep in mind, these are not even remotely close to ALS, although you might hear the "bang bang", it's not even close.
You, my friend, are mistaken. If you were boosting 10psi with your foot OFF the throttle, then maybe you have anti-lag. And if you do, I would sure like to see your setup for bypassing and metering air past the throttle butterflies. Not to mention how you're controlling the added fuel and massively retarded spark.
But what I'm sure you have is a stationary rev limiter (Step one) and perhaps a moving limiter for flat foot shifting (Step two). Keep in mind, these are not even remotely close to ALS, although you might hear the "bang bang", it's not even close.
But what I'm sure you have is a stationary rev limiter (Step one) and perhaps a moving limiter for flat foot shifting (Step two). Keep in mind, these are not even remotely close to ALS, although you might hear the "bang bang", it's not even close.
It is not a true anti lag system in a sense. It does build boost at a stand still, however it does not add fuel and retard spark. So its not the safest way to have anti lag but if you want two step you can have it with the stock ecu.
But you do BUILD BOOST, shoot flames make loud noises and it does launch like crazy if done right. Spins all four tires and goes sideways on street tires.
So this map in the USDM evo ecu is mistaken. So is my E-01 screen that climbs to 10 psi .

The problem with the stock ecu is that it does NOT retard the timing. Unlike standalones which will retard the timing during anti lag.
So i do not recommend sleeping on the throttle since you are running full timing at a stand still. It will blow something up.
The bang bang is from hitting the stationary rev limiter.
This type of anti lag is used in drag cars to build boost at a stand still to launch out of the hole harder as well eliminate spool since your already in boost. Especially in cars with giant turbos to make xxx-xxxx amount of horsepower.
The rally style antilag is a bit different.
So my friend before you start making telling people they are mistaken maybe you should know what you are talking about first.
Last edited by Jean; Jan 29, 2007 at 12:01 AM.
Pot meet Kettle. This is the ultimate example of comic irony if ever I were to witness it in the real world.
#1 The stock ECU does retard timing when using the 2 step.
#2 Therefore the bang bang isnt just the rev limiter. It is igniting fuel nearly in the exhaust manifold (up to -8* ATDC).
#3 Drag cars and Rally Cars both use similar methods of antilag. Some Rally cars are completely electronic (i.e. standalone) and retard timing up to 25* ATDC. Other rally cars have hardware (like the JDM Evo for instance) that also injects A/F into the exhaust manifold.
#4 Before you tell people they need to know what they are talking about, I suggest you do some serious reading.
#5 The screenshot that you showed from a stock ECU is the electronic counterpart of the hardware that USDM Evo's lack. Yes the code is there, but that isnt what controls the 2 step.
#1 The stock ECU does retard timing when using the 2 step.
#2 Therefore the bang bang isnt just the rev limiter. It is igniting fuel nearly in the exhaust manifold (up to -8* ATDC).
#3 Drag cars and Rally Cars both use similar methods of antilag. Some Rally cars are completely electronic (i.e. standalone) and retard timing up to 25* ATDC. Other rally cars have hardware (like the JDM Evo for instance) that also injects A/F into the exhaust manifold.
#4 Before you tell people they need to know what they are talking about, I suggest you do some serious reading.
#5 The screenshot that you showed from a stock ECU is the electronic counterpart of the hardware that USDM Evo's lack. Yes the code is there, but that isnt what controls the 2 step.
Pot meet Kettle. This is the ultimate example of comic irony if ever I were to witness it in the real world.
#1 The stock ECU does retard timing when using the 2 step.
#2 Therefore the bang bang isnt just the rev limiter. It is igniting fuel nearly in the exhaust manifold (up to -8* ATDC).
#3 Drag cars and Rally Cars both use similar methods of antilag. Some Rally cars are completely electronic (i.e. standalone) and retard timing up to 25* ATDC. Other rally cars have hardware (like the JDM Evo for instance) that also injects A/F into the exhaust manifold.
#4 Before you tell people they need to know what they are talking about, I suggest you do some serious reading.
#5 The screenshot that you showed from a stock ECU is the electronic counterpart of the hardware that USDM Evo's lack. Yes the code is there, but that isnt what controls the 2 step.
#1 The stock ECU does retard timing when using the 2 step.
#2 Therefore the bang bang isnt just the rev limiter. It is igniting fuel nearly in the exhaust manifold (up to -8* ATDC).
#3 Drag cars and Rally Cars both use similar methods of antilag. Some Rally cars are completely electronic (i.e. standalone) and retard timing up to 25* ATDC. Other rally cars have hardware (like the JDM Evo for instance) that also injects A/F into the exhaust manifold.
#4 Before you tell people they need to know what they are talking about, I suggest you do some serious reading.
#5 The screenshot that you showed from a stock ECU is the electronic counterpart of the hardware that USDM Evo's lack. Yes the code is there, but that isnt what controls the 2 step.
If you read above i did state it is not a true anti lag in a sense but does get the job done. The screen shot shows the map/section that does allow you to activate anti lag to build boost.
Trust me i will know better than most how the stock ecu two step works. I blew my stock engine while holding the two step too long at a drag strip. Rod went through the oil pan. No boom ( may have been a sound but i was banging against the rev limiter so there was already alot of noise i may have just not heard it) . Just when i launched the car it went dead.
-Either i was just on it to long, which is possible
-Timing isnt retarded or not enough
Anti lag is anti lag no matter what however the drag style is used at a stand still to build boost and the rally style is used while driving to keep from going out of boost to build boost while down shifting/ rev matching .
(i may be wrong. i am no expert on the rally style anti lag or drag really. Regardless anti lag / two step is available on the USDM EVO and it can be done with the stock ecu)
You also speak of different ways to set up an anti lag system which has nothing to do with what i was talking about. #3 and #5 also argues with each other in your post since you do agree that anti lag can be set up electronically alone then you say that the usdm lacks hardware (which is true) but you already agreed that it can be done by the ecu alone. So if thats not what controls the two step on the usdm version, what does? Or how did i activate it? Unless just banging on the stationary rev limiter lets me build boost and keep at 10 psi with out going higher or falling off.( if so i appologize). But then how does it know when to retard the timing or by how much unless there is some map or control to tells it to do so, since you do state that it retards the timing. If you know where it is or how to get there please let me know. It maybe able to help some people out.
Once again if i am wrong and you can prove it then i appologize, i am no expert mr. pot.
So rather than serious reading maybe reading slowly will help you out.
Last edited by Jean; Jan 29, 2007 at 12:06 AM.









