BMW Turbo w/ Antilag :) Video inside

[bjl4776]

essentially yes. He is retarding the timing to the point were he is purposly misfiring when the exhaust valves are open so the combustion expands in the exhaust manifold making the required volume to make the turbo spin fast enough to build boost. Basically putting the car under load without actually moving the car. Turbo drag guys and rally racers use this, but they also have a huge budget to replace all of that stuff after each race.

The alternative method that is completely safe on the car is to set a switchable rev limiter on the car at anywhere from 3k-4.5k. Since not all of your cylinders fire at once it is also putting an artifical load on the cylinders that are firing since they have to work harder to make the engine keep going at that rpm. This makes the required exhaust gas volume required to build boost. It builds about half the boost that antilag setups do, but isnt any harder on your engine than driving it. And of course the shock to the drivetrain when you dump your clutch and your M/T slicks hook up making a 1.5 60'

[Ross]

I'll keep my eyes open for used mufflers for you.

[Jon K]

essentially yes. He is retarding the timing to the point were he is purposly misfiring when the exhaust valves are open so the combustion expands in the exhaust manifold making the required volume to make the turbo spin fast enough to build boost. Basically putting the car under load without actually moving the car. Turbo drag guys and rally racers use this, but they also have a huge budget to replace all of that stuff after each race.

The alternative method that is completely safe on the car is to set a switchable rev limiter on the car at anywhere from 3k-4.5k. Since not all of your cylinders fire at once it is also putting an artifical load on the cylinders that are firing since they have to work harder to make the engine keep going at that rpm. This makes the required exhaust gas volume required to build boost. It builds about half the boost that antilag setups do, but isnt any harder on your engine than driving it. And of course the shock to the drivetrain when you dump your clutch and your M/T slicks hook up making a 1.5 60'

Well I do have the limiter set at 2800 rpm. Setting a "rev limiter" is a relative term. I can have it cut fuel, I can have it cut spark, or I can have it cut fuel and spark. Cutting fuel, or fuel and spark, will not create any load as energy through the exhaust is cut. Cutting spark only, which is what I am doing, flows energy (unburnt fuel) through the exhaust.

[Jon K]

I'll keep my eyes open for used mufflers for you.

My track setup consists of a straight pipe

[Ross]

Okay, axles and driveshafts then.

[Jon K]

Okay, axles and driveshafts then.

Are you just throwing the driveshaft in there or do you have practical experience with the amount of torque it takes to break/twist our driveshafts?

[Ross]

I just threw it in to be funny but expect you will find out for yourself.
I used to be able to change a u-joint on the side of the road in 15 minutes.

[Jon K]

I just threw it in to be funny but expect you will find out for yourself.
I used to be able to change a u-joint on the side of the road in 15 minutes.

We already know what it takes About 750 hp / 650 tq with MT 10.5's and the shaft can break. I don't intend to make that power and if I do I sure as hell won't be launching it with MT's

[MPD47]

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

I already told Jon I'd supply the camera equiptment, tires, and fix anything I broke (unlikely that anything would, but the offer still stands). He declined. His car will never drift or do any serious power over. I'll have to take care of that with the wagon.

[Jon K]

I already told Jon I'd supply the camera equiptment, tires, and fix anything I broke (unlikely that anything would, but the offer still stands). He declined. His car will never drift or do any serious power over. I'll have to take care of that with the wagon.

Haha tell that to PT and Blake (blake today) Ask PT about the local muscle car meet that I did burn outs at ahha.