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Sidetops

Member Since: 13 Nov 2014
Location: Seaford
Posts: 118

2009 Freelander 2 TD4 HSE Auto Baltic Blue

Turbo flutter

Good evening guys, can you help?

Sometimes when the drivers window is down and I'm pulling away gently from rest, I can hear a faint turbo flutter. Is this just the waste gate and quite normal?

Power is excellent, and there doesnt seem to be any turbo lag, and no smoke. The noise can't be heard inside the car, only when the window is down.

12th Jun 2015 6:11 pm

Col1nw3bb

Member Since: 09 Feb 2015
Location: Essex
Posts: 198

Yup mine does the same mate. Perfectly fine, sign of good turbo pressure and wastgate doing its thing. I quite lile the wastegate noise much better than a dump valve lol.

12th Jun 2015 10:09 pm

Sidetops

Member Since: 13 Nov 2014
Location: Seaford
Posts: 118

Thanks for that, and yes I rather like the sound too

12th Jun 2015 10:14 pm

shiggsy

Member Since: 13 Jan 2013
Location: Kent
Posts: 803

2007 Freelander 2 TD4 HSE Auto Baltic Blue

There's no wastgate on the FL2 Turbo.
Hung like Einstein, smart as a horse.

13th Jun 2015 10:32 am

Col1nw3bb

Member Since: 09 Feb 2015
Location: Essex
Posts: 198

i could be wrong here but i believe there is an internal wastegate as with most turbos. Wastegate/dumpvalve pretty essential on petrol as the sudden snap shut of the throttle body would cause turbo to stall and damage it.

On derv no throttle butterfly but id think it quite likely engine damage would result from how lean the air fuel mix gets on run off with the turbo continuing to spin full pelt.

13th Jun 2015 11:36 am

Mikey

Member Since: 07 Jun 2008
Location: Dundee
Posts: 785

2012 Freelander 2 SD4 HSE Auto Baltic Blue

There is no internal wastegate on a modern VNT turbo. The boost pressure is controlled by the VNT actuator, which moves vanes inside the turbo, altering the speed the turbo spins at.

The noise you are hearing is the vanes cutting through the air inside the turbo, as they move

EDIT: A modern Diesel engine is a lean burn engine. The damage is caused by overfuelling, be it too much fuel, or not enough air. This is why cheap tuning boxes and unknown remaps should be avoided

Last edited by Mikey on 13th Jun 2015 12:06 pm. Edited 1 time in total

13th Jun 2015 12:04 pm

Col1nw3bb

Member Since: 09 Feb 2015
Location: Essex
Posts: 198

There you go then. New thing learned today. Sounds very wategate though

13th Jun 2015 12:05 pm

Sidetops

Member Since: 13 Nov 2014
Location: Seaford
Posts: 118

Mikey wrote:
There is no internal wastegate on a modern VNT turbo. The boost pressure is controlled by the VNT actuator, which moves vanes inside the turbo, altering the speed the turbo spins at.

The noise you are hearing is the vanes cutting through the air inside the turbo, as they move

EDIT: A modern Diesel engine is a lean burn engine. The damage is caused by overfuelling, be it too much fuel, or not enough air. This is why cheap tuning boxes and unknown remaps should be avoided

Fantastic explanation - thank you!

Interesting remap advice. I was thinking of having a remap done even though I'm happy with its performance. The consideration is more to do with potentially improved fuel consumption.

A local Land Rover specialist here is offering 'Monster tuning' http://www.crallenandsons.co.uk/remaptuning/

13th Jun 2015 12:58 pm

Mikey

Member Since: 07 Jun 2008
Location: Dundee
Posts: 785

Whatever we buy, it will be mapped by Alive Tuning

13th Jun 2015 2:30 pm

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