Turbo lag on a 2011 X5 35d

[Penguin]

Originally Posted by Jim E.

SprintBooster Power Converter - www.SprintBoosterSales.com

I personally have not tried it but thought it was interesting.

I do not know if the Sprint Booster works, but the mere fact of its existence and sale confirms there is a perceived throttle response problem.

[JasonG]

sorry if off topic- so in manual mode it will shift near redline if for example left in M1?? It's logical, but just checking as didnt want to test it.

[SANguru]

Originally Posted by JasonG

sorry if off topic- so in manual mode it will shift near redline if for example left in M1?? It's logical, but just checking as didnt want to test it.

no.. it will hold redline.

[Richard in NC]

Originally Posted by SANguru

no.. it will hold redline.

Are you sure? The Sport Auto in my 550i would shift at redline when in manual mode. I don't think I've taken my X5 50i to redline yet.

[southwold]

2008 E70 3.0d and no lag as well..... Yours shouldn't either... Get it check out.

[e70]

Originally Posted by gerrypd

Anybody expriencing a turbo lag on their X5?
Mine is really horrible to a point that is quite scary especially on an intersection coming from standstill and you gun the accelerator.
Is this normal?
I have an 08 E60 with a twin turbo engine and there is no such turbo lag on that car.

That's not a turbo lag. For example a turbo lag is when you floor it in 6 gear at 1000 rpm (manual gearbox) and nothing happens untill 1500-1800 rpm (boost threshold )
What you experienced is a throttle lag which should diminuate in DS mode.
This lag is ment to protect the engine+gearbox from the big torque.
I've driven a X6 35d CHIPTUNED which didn't have this lag (very brutal in a good way)

[ard]

Originally Posted by e70

I've driven a X6 35d CHIPTUNED which didn't have this lag (very brutal in a good way)

Unless you are the transmission...

I think much of the throttle programming in modern cars is designed to protect driveline components... Engineers know precisely what they are doing, these cars are not designed wil 'laggy' throttle response just because the developers arent paying attention!

[e70]

Originally Posted by ard

Unless you are the transmission...

I think much of the throttle programming in modern cars is designed to protect driveline components... Engineers know precisely what they are doing, these cars are not designed wil 'laggy' throttle response just because the developers arent paying attention!

[XXX555]

Originally Posted by Penguin

I do not know if the Sprint Booster works, but the mere fact of its existence and sale confirms there is a perceived throttle response problem.

Understand your point but 87, 89, 91, 93 octane gas is commonly sold as well based on perceptions.

[ard]

Originally Posted by AlexK

Not really. For example, you won't lose the warranty if you always drive in D/S (or M/S, depending on the model) transmission mode, even though it changes throttle programming to be more responsive (same goes for BMW models with Dynamic Driving Control). I believe it has more to do with car's manufacturers desperately trying to improve the numbers on EPA (for USA models) sticker - EPA tests cars only in their "default" settings (with automatic transmission in "D" mode, or with DDC in its default position), that's why the "default" settings must be as fuel-efficient (and with least amount of emissions) as possible, regardless of any other condition.

Perhaps some truth top that as well. (That throttle response is done to he;[ EPA tests.)

But who said anything about losing warranty if you use it in one of the modes BMW allows???? (Changing programming to something OTHER than that which BMW specifies as a user setting WILL lose you your warranty/