Now I'm somewhat new to the whole turbo thing, my Z has been turbo'd for about a year now and its my learning tool.

I just saw an evo that had anti lag on it. From what I've read online its all based on the engine management system. I haven't seen this on any turbo z's at all why not? Alot of Z owners seem to try to get the turbo lag as low as possible but this would seem to work.

The second question is what kind of control would my engine management have to have to be able to accomplish this. I have the utec, can it be done with this system.

Also it seems to be a lot of stress on the exhaust manifolds, would I have to upgrade my exhaust manifolds to handle this.

 

i think it has something to do with injecting fuel before the first cylinder or something like that. I want to know this as well. Someone here will chime in on this.

 

jusst dumps a lot of fuel that "sorta" ignites at the turbo, raises exhaust gas pressure and burns up turbos. its not really a good thing.

 

Anti-lag is great for a rally car who gets engine swaps and new parts every race, bad for someone who wants their car to last a while.
Anti-lag dumps fuel into your headers which makes a pulse that spools up your turbo. Ruins your exhaust and turbo.

 

it spits flames too.. i got it setup on my fcon its sweet

 

It spools up your turbo when you are getting ready to launch so you can get off the line in boost.

 

a hot turbo spools up faster and makes more boost with less load. pretty much you dump a bunch of fuel into the engine so it doesnt burn and passes through the engine. then you set the timing to fire really late so it ignites the exhaust coming out and catches fire past the engine to create A LOT of heat.


it will ruin the turbos though very very fast.

 

Also called 2-step.

 

i think 2 step is a lil diff.

 

O, nvm then.

 

here we are: off a dsm site

Stutterboxes/2-steps are for holding the motor at a constant RPM for launching on any car, boosted or not. It does it by randomly dropping the ignition to cylinder to keep the RPM stable. Doing that just happens to make turbos spool somewhat also. They usually build boost slowly and with a bigger turbo, you might only see a few pounds of boost.

Anti-lag is specifically made to spool turbos. It usually involves retarding the timing a lot and adding some fuel. If setup aggressive enough, it can have a large turbo making 20+psi almost instantly.

 

How bad is it really, I mean I don't really track my car too much maybe 3-4 times during the summer. If I had a map set up just for this and only used it 4 times a year would the turbo last a couple years. Also would the manifolds last.

 

I was just meaning how 2-step builds boost too. Some of the supras 2-step to full boost and launch

 

Is there a way I can safely set this up so that I can have the full 9lbs at launch. Maybe not the anti lag but maybe what thawk is talking about would work saftely.

 

I've read that anti-lag systems will inject fuel such that it doesn't ignite in the combustion chamber, but rather after entering the exhaust valve. Hence the ignition retardation. The fuel and air explode afterwards, keeping the turbo spinning. From what I heard, it is hot enough in the turbo manifold to ignite the mixture already. Like everybody said, it's not very good for a daily driver. WRC cars do it because they can change engines at least every race (they don't even run blow off valves)

 

anti lag is really not worth running unless you have tons of money to repair your car every month.

if your just looking to have boost built up for a launch run a 2-step instead.

 

Now how does a 2 step work then, I always thought a 2 step was just to keep the rpms at the right rpm right at launch. Not to gain boost.

 

it builds boost up a lil bit....it wont hit full boost like anti-lag

from my post above:
Stutterboxes/2-steps are for holding the motor at a constant RPM for launching on any car, boosted or not. It does it by randomly dropping the ignition to cylinder to keep the RPM stable. Doing that just happens to make turbos spool somewhat also. They usually build boost slowly and with a bigger turbo, you might only see a few pounds of boost.

 

Anti = teh sex. ridding in an evo with anti lag setup. They require a special type of turbo that will take the abuse for a good length of time. However everyone is right it will tear the turbo up eventually.

 

A two step does keep the rpms at an optimal place for launching, but also allows you to build boost. By giving opening the throttle and limiting the revs, it loads the motor and builds boost. We can build 5-10+psi very quickly on the Z's using the Haltech two-step.

As for antilag, we will be setting this up in the Haltech as well.. but right now we have not had the first person require it for two reasons:
1. No one is running a monster turbo(s) that has such a hard time spooling that a standard two-step won't bring it alive
2. No one has their suspension / tires / launch dialed in so well that they need the additional boost beyond what two-step builds