Turbo lag on a 2011 X5 35d - Page 3

JasonG · #1 01-07-2011, 12:44 PM

I dont see any abnormal issues with ours, powertrain is great, smooth and torquey....diesel's do drive different than gassers and using progressively more throttle has always provided best results for me (same with my truck otherwise it smokes until the turbo spools and then it's a cat shot off a carrier - only one, oversized turbo so much diff than x5)

Kloogy · #2 01-07-2011, 01:17 PM

According to what a friend of mine who is Service tech for another auto maker told me, it is not turbo lag. It has to do with the throttle system in the X5.

JasonG · #3 01-07-2011, 06:45 PM

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 · #4 01-07-2011, 07:12 PM

Quote:

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 · #5 01-07-2011, 07:39 PM

Quote:

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 · #6 01-08-2011, 04:57 AM

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

e70 · #7 01-08-2011, 05:20 AM

Quote:

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 · #8 01-08-2011, 01:44 PM

Quote:

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 · #9 01-08-2011, 02:48 PM

Quote:

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!

Penguin · #10 01-08-2011, 08:31 PM

Quote:

Originally Posted by ard

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!

I suspect there is some truth to that, similar to the reason BMW puts CDV's on their manual transmission vehicles.

Anyone know when BMW started using Clutch Delay Valves? I assume there was a time when BMWs did not have CDVs. I'm guessing it happened when the HP grew to high levels.