BMW Turbo w/ Antilag :) Video inside

[04 Turbo Spec]

thats cool as hell, i would love to see the car in action

[SoStock92]

Originally Posted by 04 Turbo Spec

thats cool as hell, i would love to see the car in action

Yeah me too - I am nearing completion on my other engine. Then swap sometime late summer, break in, and then real boost.

[foss]

Very cool mang.

[markley02]

Originally Posted by foss

I'm not really sure what antilag is, but my guess would be a method of having boost at launch? Can someone clarify this for me?

Reading is not your strong point huh?

[Bsaint]

sounds sick John, I want to do an anti-lag/launch control for flat shifting launching exc.., did you basically just tune it with your stand alone...?

[SoStock92]

Originally Posted by Bsaint

sounds sick John, I want to do an anti-lag/launch control for flat shifting launching exc.., did you basically just tune it with your stand alone...?

Well the car was already tuned fuel wise for the boost that the launch control generates so it is technically tuned yeah. Its all controlled through the standalone, so it handles the timing retard and the fuel is already done for boost so it just references the fuel table.

[wgknestrick]

There are 2 ways to get an "anti-lag" system:

1. This was the first method and used in the earlier WRC cars. A secondary fuel injector and spark plug was installed in a very robust exhaust manifold. This would inject and ignite fuel during idle and throttle lifts to burn fuel to keep the turbo rotating (just like a turbine or jet engine)

2. Newer way: Ignition timing is altered in a way to ignite the mixture very late in the combustion process. This in turn keeps the flame going even as it leaves the exhaust valves and through the manifold.

wikopedia doesn't explain this concept very well and focuses too much on how they supply the air needed for this combustion. Basically to have anti-lag, you need a way to ignite fuel right before the turbine (just like a jet engine)

Sostock92, you car does not have anti-lag and anti-lag is not a soft rev limiter either (flat foot shifting). They have some of the traits of anti-lag in that they tend to retard the timing and greatly raise EGTs due to much more flame escaping into the manifold. True Anti-lag is much more complex system.

and seen here:
http://www.youtube.com/watch?v=d18aLp0RRks

[SoStock92]

I understand - but running negative timing, like I am, or timing After TDC, has the exact same effect of combustion in the manifold. I am running between -20 and -10 advance, which means by time the explosion is happening, my exhaust valves are already opening.

[sherwood]

http://www.youtube.com/watch?v=2RAAjqe8u0s

coolest demonstration of antilag haha...baller ass corona

[wgknestrick]

Originally Posted by SoStock92

I understand - but running negative timing, like I am, or timing After TDC, has the exact same effect of combustion in the manifold. I am running between -20 and -10 advance, which means by time the explosion is happening, my exhaust valves are already opening.

But it is when you run it that makes the difference. Your car does not do this all the time off throttle. You are using a soft rev limiter

[SoStock92]

Originally Posted by wgknestrick

But it is when you run it that makes the difference. Your car does not do this all the time off throttle. You are using a soft rev limiter

Right, but I can set it up to do it all the time off-throttle. The car is capable. I click a couple boxes and I can do it

[den9]

Originally Posted by sherwood

http://www.youtube.com/watch?v=2RAAjqe8u0s

coolest demonstration of antilag haha...baller ass corona

sounds like a god damn 2 stroke

[SoStock92]

Yeah that wasn't the best demonstration by any means

[antman0408]

You call that a 2-step, this is a 2-step
http://videos.streetfire.net/search/...8200e59cf0.htm

[foss]

Originally Posted by antman0408

You call that a 2-step, this is a 2-step
http://videos.streetfire.net/search/...8200e59cf0.htm

Sounds like a freaking machine gun.

[nomad]

dude do you live near the train tracks or actualy right beside them? i've seen that car and it is a bad ass bmw. make me want to get one. ya that anti lag system is crazy, can't wait to see it in person.

p.s. i see you all the time at the tst meets, never see ur car though, good luck with the swap.

[SoStock92]

Originally Posted by nomad

dude do you live near the train tracks or actualy right beside them? i've seen that car and it is a bad ass bmw. make me want to get one. ya that anti lag system is crazy, can't wait to see it in person.

p.s. i see you all the time at the tst meets, never see ur car though, good luck with the swap.

Which train tracks do you mean? Are there any car meets coming up? I am goign thru withdrawal