Is there an anti lag / no lift shift for the B5 S4?

[broadmargin]

I'm running a stage 3 apr tune with K04s and Meth.
Is there any type of antilag or NLS available? I would assume APR could provide something like this. I have no idea.

[Corradovolksb]

Apr does not offer any Antilag or nls upgrade as far as I know. You will need a retune for you have antilag and nls. PM me and we can talk more about it if you want.


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[travis_w]

The best is to find a tuner that would do it for you. There are plenty out there that can do it like the guy above.

[S4UCE]

Ditch that off the shelf tune and get a real custom tune. More power, fun features like NLS, and better support. If you start breaking up in boost and call APR for help, god know what they'd try to sell you.

[Trb1]

You can add it into an off the shelf tune. I’ve done it to a GIAC tune before, but it involves opening up the ecu and putting it into boot mode.

[christianb5s4]

No-lift functions along with anti-lag/launch control is a standard feature from most custom tuners these days. I know Blake also found a way to make rolling anti-lag work but it was too cumbersome to be offered due to the limitations of ME7.

[vavJETTAw36]

No-lift functions along with anti-lag/launch control is a standard feature from most custom tuners these days. I know Blake also found a way to make rolling anti-lag work but it was too cumbersome to be offered due to the limitations of ME7.

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[julex]

What's the point of rolling anti lag when you can actually simply brake boost the car to have even more immediate torque available instantaneously with turbos already boosting? Just asking for discussion.

[broadmargin]

What is "rolling anti lag"? Is it another name for No lift shift?

[vavJETTAw36]

What's the point of rolling anti lag when you can actually simply brake boost the car to have even more immediate torque available instantaneously with turbos already boosting? Just asking for discussion.

I thought this WAS what rolling antlag is.

[broadmargin]

how do you brake boost while rolling?

[christianb5s4]

What's the point of rolling anti lag when you can actually simply brake boost the car to have even more immediate torque available instantaneously with turbos already boosting? Just asking for discussion.

He tried it for the sake of trying and is the reason it was never released for public consumption. I just mentioned it's been tried but ultimately was not worth it.

[julex]

how do you brake boost while rolling?

You floor the gas pedal and press brake pedal enough to keep the speed constant while engine is boosting

But I think I know where your question comes from. The stock tune has safety in it where it disengages the throttle if brake pedal was pressed first before throttle... this can be tuned out of course but there is a workaround that will work for rolling brake boosting. You simply press the gas pedal in first and then the brake pedal. With this sequence it won't intervene. Or maybe it is vice versa, either way try both ways and one will allow you to brake boost to your heart's desire or rather until you run out of vacuum in your brake booster .

[julex]

What is "rolling anti lag"? Is it another name for No lift shift?

When you want to have a rolling race (where both cars are going at some constant low speed to eliminate starting from a dig) and you want to have as much advantage as possible by having your engine generating full boost before the race starts but the cars needs to be at constant speed matching the other car.

You basically end up rolling at say 30mph with gas pedal in 100% while the car is actually not accelerating yet. Anti lag would use spark interruption to ensure that engine is not generating much torque (but of boy would that be jerky ride!). Brake boosting accomplishes it by letting engine generate torque and boost with 100% gas pedal in but you use brakes to hold the car at constant speed. It takes some practice of course and you have to use both feet to accomplish that.

[S4UCE]

When you want to have a rolling race (where both cars are going at some constant low speed to eliminate starting from a dig) and you want to have as much advantage as possible by having your engine generating full boost before the race starts but the cars needs to be at constant speed matching the other car.

You basically end up rolling at say 30mph with gas pedal in 100% while the car is actually not accelerating yet. Anti lag would use spark interruption to ensure that engine is not generating much torque (but of boy would that be jerky ride!). Brake boosting accomplishes it by letting engine generate torque and boost with 100% gas pedal in but you use brakes to hold the car at constant speed. It takes some practice of course and you have to use both feet to accomplish that.

If you know how to heel-toe, it can be more natural to brake boost with just your right foot. It was for me at least. When I was first attempting it, I was trying to use my left foot on the brake. It was awkward and I found my left foot only understands springy clutch pedals. The sides of my right foot already know how to modulate the throttle and brake independently, so brake boosting was fairly natural.

[julex]

If you know how to heel-toe, it can be more natural to brake boost with just your right foot. It was for me at least. When I was first attempting it, I was trying to use my left foot on the brake. It was awkward and I found my left foot only understands springy clutch pedals. The sides of my right foot already know how to modulate the throttle and brake independently, so brake boosting was fairly natural.

Yes, first few times might try sending you through the front windshield when you mash that brake pedal with the left foot only knowing how to mash clutches in . I agree to heel-toe comment wholeheartedly!

[Isaac313]

My take is that you're probably going to beat that BMW in a rolling race anyway so who cares to wear out your brake pads while doing it?

[broadmargin]

My take is that you're probably going to beat that BMW in a rolling race anyway so who cares to wear out your brake pads while doing it?

I dunno. my brother-in-law has a tuned 335 and it's just mean from a roll.
I can take him from a dig, mainly because he can't launch and ends up sideways. Even if he could launch, i could still take him from a dig...but those highway rolls....

[Isaac313]

I haven't really compared my mostly stock stage 2 to my dads E46 M3. Probably similar up top, but mine feels like it pulls harder so I'm not sure yet at this point.