Anti-Lag vs Two step

[02_silver_wagon]

Does anybody know if the anti lag system with haltech e11 is the same as two step rev limiter with TEC III? I read the Haltech manual and this is what I found, but it doesn't sound like a two step rev limiter to me.

"Anti-Lag OutputAnti lag can be used in two ways:1. Rally ModeThe traditional use is for rally driving to keep boost up between gear changes and throttle offconditions. When the throttle is closed, this output becomes active, additional fuel is injected andignition is retarded. This ensures that expanding hot gases leave the exhaust to keep the turbinespinning. The output is often used to open a solenoid to allow additional air to enter the exhaust toassist the burning charge in the exhaust between the engine and turbine.2. Launch ModeTo aid turbo vehicles to “launch” from a standing start, the anti-lag feature can be activated with anauxiliary input to allow the vehicle to build boost pressure when free revving in neutral. Thecombination of enriched fuel and retarded timing keeps the engine speed safe for the wide throttleopenings required to build boost. The output is typically not required in these applications."

[WDRacing]

Using AntiLag is very hard on your turbo and manifold. They will become extremely hot. Putting unburnt fuel into the exhaust manifold isn't the best option for a daily driver. And is really not needed unless its for a race car that does Autocross or some type of extended Rally racing. Drag racing doesn't require this either. A simple safe Bosst activated N2O system would be much cheaper and safer.

Or like you suggested already a 2 or 3 way rev limiter can be used to generate boost prior to launch. But I believe the MSD 2 and 3 step limiters require use of the MSD 7AL system with the soft touch rev control. Which is a good investment in itself.

Kind of rambling, hope that made sense.

WD

[Checkered-Member]

They will become extremely hot. Putting unburnt fuel into the exhaust manifold isn't the best option for a daily driver.

True, but you will have flames shooting out the back...how cool is that?:D

[02_silver_wagon]

Using AntiLag is very hard on your turbo and manifold. They will become extremely hot. Putting unburnt fuel into the exhaust manifold isn't the best option for a daily driver. And is really not needed unless its for a race car that does Autocross or some type of extended Rally racing. Drag racing doesn't require this either. A simple safe Bosst activated N2O system would be much cheaper and safer.

Or like you suggested already a 2 or 3 way rev limiter can be used to generate boost prior to launch. But I believe the MSD 2 and 3 step limiters require use of the MSD 7AL system with the soft touch rev control. Which is a good investment in itself.

Kind of rambling, hope that made sense.

WD

I knew what anti-lag was, but I didn't realize it was the same as Launch mode. I researched the MSD 7AL-2. It came in 3 versions a 4,6,8 cylinder version, do you know what the difference is? Because if I'm going to spend $400 on an ignition system and a 2 or 3 step I might as well get the 8 cylinder version for later 6/8 cylinder applications.

What do you think would be better (granted I will get a knowledgeable tuner) Haltech with MSD ignition or TEC III. I'm looking to have a built KA with the GT3037, and run I'm looking for 300-350whp (15psi) daily and 400whp (20-22psi) with pump gas and alcohol injection on the weekends.

[WDRacing]

I'll tell ya one thing, ya don't need an expensive standalone for 400whp...Especially if your gonna run alky.

I'd stick with the 4 cyl MSD version.

[02_silver_wagon]

I'll tell ya one thing, ya don't need an expensive standalone for 400whp...Especially if your gonna run alky.

I'd stick with the 4 cyl MSD version.

Well one of my main goals for this car is learning tuning, that is why i am thinking about standalone. What would you recomend for 400hp?

[deezlins]

its also known as a "bang bang" system

http://www.rallycars.com/Cars/bangbang.html

downsides:

A quick rise of the turbocharger's temperature (which jumps from ~800°C to the 1100°C+ region) whenever the system is activated

A huge stress on the exhaust manifold and pipes (mounted on a street car a bang-bang system would destroy the exhaust system within 50-100 km)

The turbo produces significant boost even at engine idle speeds

The explosions which occur in the exhaust tubes generate important flames which can, sometimes, be seen at the end of the exhaust tube

Reduced engine brake

[02_silver_wagon]

Well one of my main goals for this car is learning tuning, that is why i am thinking about standalone. What would you recomend for 400hp, WDRacing?

[95_240sx]

I Use a LinkPlus (http://www.link-electro.co.nz) and it has a built in 2-step launch control. Thats how I broke my transmission, I left the line (tried to leave) at about 5500rpm shootin flames on slicks at about 8-10psi. Its fun if it doesnt break, because it gives you some nice whiplash. I find it a very useful situation.

However, I have noticed that whenever I use my 2-step, my EGT's take a big dive and get super cold.

Rick

[WDRacing]

Sorry for the late reply, I'm in the middle of moving back stateside so I'm a tad busy. Personally, I'd use subinjectors, the MSD BTM and be done with it. The MSD BTM will take care of timing well past 400 and the subinjectors can support well into the 1000HP range depending on the size. Plus you still get to play with your fuel tuning for education purposes.

There's nothing wrong with a standalone, it leaves alot of room for improvement as well. I just don't see the need.

You could always run a Alky system for high boost runs as an option. I used alky on my Skyline with fantastic results.

WD