[Sara]

Doing a 3 hr study for BMW tomorrow with other owners from around SoCal.

For owners and people who have driven the 335is before, how does launch control benefit for you?

[wwc310]

Originally Posted by Sara504

Doing a 3 hr study for BMW tomorrow with other owners from around SoCal.

For owners and people who have driven the 335is before, how does launch control benefit for you?

increased transmission wear, extra stress on drive train, and shorter tire tread life.

[Sara]

Originally Posted by wwc310

increased transmission wear, extra stress on drive train, and shorter tire tread life.

lol I don't think Im going to put that down.

[benzo23]

I know I would love to know the benefits of launch control, cant wait to see the results

[Dozhdbog]

I don't think I really understand the question, Sara.

In a racing scenario, launch control will give a reliable and repeatable quick start from a stop which limits wheel spin and maximizes power. Launch control in the 335is has been shown to be a more reliable method for obtaining very fast starts than otherwise. Chance of a money shift is also zero, so there's a safety card as well when compared to manuals.

[pgaplayerless]

launch control = good for people that don't know how to launch.

[Sara]

Originally Posted by Dozhdbog

I don't think I really understand the question, Sara.

In a racing scenario, launch control will give a reliable and repeatable quick start from a stop which limits wheel spin and maximizes power. Launch control in the 335is has been shown to be a more reliable method for obtaining very fast starts than otherwise. Chance of of a money shift is also zero, so there's a safety card as well when compared to manuals.

What is a money shift?

[Dozhdbog]

A money shift is mis-shifting and over-revving the engine to the point something breaks. In a racing scenario, this can very easily happen in the heat of the moment. The driver is flooring it, adrenaline is rushing, and the shifts need to happen very fast. This is a recipe for grenading the engine, particularly with less experienced drivers.

[Sara]

Originally Posted by Dozhdbog

A money shift is mis-shifting and over-revving the engine to the point something breaks. In a racing scenario, this can very easily happen in the heat of the moment. The driver is flooring it, adrenaline is rushing, and the shifts need to happen very fast. This is a recipe for grenading the engine, particularly with less experienced drivers.

Ahh I see. Great point. I will use this in our discussion tomorrow.

[Dozhdbog]

It's called a money shift because it will cost you the big bucks once it happens.

[Sara]

Originally Posted by Dozhdbog

It's called a money shift because it will cost you the big bucks once it happens.

I see. Great term. Thank you

[pgaplayerless]

Originally Posted by Dozhdbog

A money shift is mis-shifting and over-revving the engine to the point something breaks. In a racing scenario, this can very easily happen in the heat of the moment. The driver is flooring it, adrenaline is rushing, and the shifts need to happen very fast. This is a recipe for grenading the engine, particularly with less experienced drivers.

why there's the thing called shift light...

[ThEnder]

Money shifting only happens when down shifting, the ECU will cut fuel before it allows the engine to over rev when accelerating so I'm not sure you can really count money shift avoidance as a benefit of launch control.

IMO the benefit of launch control is that you can execute a flawless launch every time with no skill required. The computer holds the engine at the right level of power, engages the clutch, and modulates the throttle so all you have to do is put your foot down and hold on.

[The Cleaner]

Originally Posted by ThEnder

Money shifting only happens when down shifting, the ECU will cut fuel before it allows the engine to over rev when accelerating so I'm not sure you can really count money shift avoidance as a benefit of launch control.

Ya I think I would agree, DCT will prevent a mis shift but Launch Control is not involved.

This would not be complete without an example.... Lets watch this guy buy an engine.

[Dozhdbog]

Originally Posted by ThEnder

Money shifting only happens when down shifting, the ECU will cut fuel before it allows the engine to over rev when accelerating so I'm not sure you can really count money shift avoidance as a benefit of launch control.

IMO the benefit of launch control is that you can execute a flawless launch every time with no skill required. The computer holds the engine at the right level of power, engages the clutch, and modulates the throttle so all you have to do is put your foot down and hold on.

I don't think money shifting is an issue with dcts or ats in general. I was explaining how it is an issue with manuals, and that the 335is with DCT has the benefit of not needing to be concerned about it.

[Dozhdbog]

Originally Posted by pgaplayerless

why there's the thing called shift light...

Shift light will not prevent someone from accidentally shifting into a lower gear and blowing their engine in a manual vehicle.

[Dozhdbog]

Originally Posted by The Cleaner

Ya I think I would agree, DCT will prevent a miss shift but Launch Control is not involved.

This would not be complete without an example.... Lets watch this guy buy an engine.

Launch control is a benefit in non-manual vehicles, as is not mis-shifting. That was my point.
I didn't mean to sidetrack this, was just pointing out to Sara that along with launch control, another benefit to fast starts in a dct equipped vehicle is not money shifting, which is a concern in a manual, which also does not have launch control.

[pgaplayerless]

Originally Posted by Dozhdbog

Shift light will not prevent someone from accidentally shifting into a lower gear and blowing their engine in a manual vehicle.

and neither would launch control.....launch control does control downshifting....

[Dozhdbog]

Originally Posted by pgaplayerless

and neither would launch control.....launch control does control downshifting....

Let me explain my point bluntly here....

Launch control is in the DCT equipped 335is, it is not in the manual version.
A benefit of a DCT equipped 335is is having launch control -you will smoke a manual 335is, all else being equal, nearly every launch. Another benefit of having a DCT is not money shifting, whereas in a manual, moneyshifting is a concern anyone racing should have.

I am sorry if my former posts made it sound like launch control was causally linked to preventing a money shift. I only meant that DCT 335is's have the advantages of both launch control and not having to worry about a money shift.

[Mardio]

I think the whole process of getting ready for launch control is fun for myself and my passenger. From picking the spot to watching the flag come up, gets the blood flowing. The launch itself is the icing on the cake and by then the adrenaline is really pumping.

[mike-y]

Originally Posted by ThEnder

Money shifting only happens when down shifting, the ECU will cut fuel before it allows the engine to over rev when accelerating so I'm not sure you can really count money shift avoidance as a benefit of launch control.

he's talking about mis-shifting a manual transmission. the money shift occurs while attempting to *upshift*, but the shifter goes into the wrong gate and blows up your engine (because instead of grabbing 4th, you went to 2nd)

then your wallet becomes much thinner as you pay for a new motor.

[pgaplayerless]

Originally Posted by Dozhdbog

Let me explain my point bluntly here....

Launch control is in the DCT equipped 335is, it is not in the manual version.
A benefit of a DCT equipped 335is is having launch control -you will smoke a manual 335is, all else being equal, nearly every launch. Another benefit of having a DCT is not money shifting, whereas in a manual, moneyshifting is a concern anyone racing should have.

I am sorry if my former posts made it sound like launch control was causally linked to preventing a money shift. I only meant that DCT 335is's have the advantages of both launch control and not having to worry about a money shift.

Experinced driver doesn't need computers to do their launch.... Sorry when the computer is doing all the work, YOU aren't smoking anybody.