BMW Turbo w/ Antilag :) Video inside

Quite f*cking loud in person... my dog is still freaked out inside the house.

Launch control/anti-lag here switch activated to build boost on the line with clutch in.

Very cool

http://blowneuroz.com/mygallery/antilag.wmv

omg ****ing hot!

We're still waiting for some drive-by's and powerslides!

Haha soon enough

How much are you boosting in neutral? It seemed like you wussed out and backed off before it could build boost up.

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Originally Posted by Anton CH.

How much are you boosting in neutral? It seemed like you wussed out and backed off before it could build boost up.

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Between 6 - 8 psi. I didn't wuss out doing anything - merely running this sort of system takes balls. The boost varies because of the spark cut, but the needle dances between 6 - 8 psi.

This is at 2800 rpm and -10 timing. 4500 and -10 timing should yield full 10 - 12 psi for launch. Now I just need axles and slicks to make it hook up.

In case you didn't know, its a system you want to run as short as possible. It kills manifolds, turbos, and mufflers.

Quote:

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Originally Posted by Jon K

Between 6 - 8 psi. I didn't wuss out doing anything - merely running this sort of system takes balls. The boost varies because of the spark cut, but the needle dances between 6 - 8 psi.

This is at 2800 rpm and -10 timing. 4500 and -10 timing should yield full 10 - 12 psi for launch. Now I just need axles and slicks to make it hook up.

In case you didn't know, its a system you want to run as short as possible. It kills manifolds, turbos, and mufflers.

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It only takes a large wallet to run ALS. I'd also add a few drive shafts to your list up there. I wasn't aware that you are trying to build a quarter mile car.

you could always just two step it and build the 6-8 psi @ 4500rpm. It is much nicer on your hot side and a little nicer on your drivetrain. You still get some balls of the line without melting turbine wheels. You might want to monitor your EGTs if your making your manifold a Jet engine. That is essentially what you are doing.

Quote:

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Originally Posted by Anton CH.

It only takes a large wallet to run ALS. I'd also add a few drive shafts to your list up there. I wasn't aware that you are trying to build a quarter mile car.

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I'm not - but I will make passes with traction assistance :)

Driveshaft isn't my worry, it's axles.

Jon, Is this done by adding fuel to exhaust?

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Originally Posted by Ross

Jon, Is this done by adding fuel to exhaust?

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It's actually done by retarding the timing negative, meaning you ignite the mixture as the piston is on its way downward, so you have intake, compression, then ignition, then exhaust.

I cut spark, but not fuel, so when I hit the 2-step limiter (2800 rpm) it cuts spark but stays with fuel, to keep the exhaust energy up.