No boost gauge indication under 2900rpm?

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No boost gauge indication under 2900rpm?

Postby Twayblade » Tue 08.06.2021, 16:58

Hi all- can someone enlighten me on what my boost gauge should be indicating when operating normally? I have an SE and I don't seem to have any boost indication (0bar boost)below 2900rpm? Above that and I get a boost indication 0.75 bar approx depending on how the car is driven
My understanding is that a boost indication up to 0.4bar is normal below 2900 rpm.
Could this be wastegate related?
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Re: No boost gauge indication under 2900rpm?

Postby dapinky » Tue 08.06.2021, 19:04

The ECU is programmed to need to meet certain requirements before 'allowing' the turbo to boost.

It needs to be at a certain temperature, throttle opening and revs.

From memory, it is 3000rpm on a 'standard' memcal map, and drops to 2800 with an Everest chip. So, yours is behaving as I would expect. It is all done in an attempt to prevent the engine from blowing itself up.
Dave

Just the one now, but this one's mine! - and it will be finished eventually..... - but also temporary custodian of a project until it is finished enough for Angie to drive it


...oh, and a 2006 Freelander destined for the jungles of The Gambia - 4500 miles across roads, desert and tracks - what could possibly go wrong?
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Re: No boost gauge indication under 2900rpm?

Postby esprit888 » Tue 08.06.2021, 19:21

dapinky wrote:The ECU is programmed to need to meet certain requirements before 'allowing' the turbo to boost.

It needs to be at a certain temperature, throttle opening and revs.

From memory, it is 3000rpm on a 'standard' memcal map, and drops to 2800 with an Everest chip. So, yours is behaving as I would expect. It is all done in an attempt to prevent the engine from blowing itself up.

:agree:
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Re: No boost gauge indication under 2900rpm?

Postby Twayblade » Tue 08.06.2021, 21:02

Thank you for the explanation, re assuring that nothing is amiss! just out of interest where do you get this info from?
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Re: No boost gauge indication under 2900rpm?

Postby dapinky » Wed 09.06.2021, 11:03

Twayblade wrote:...... just out of interest where do you get this info from?


It's all on Alans 'Mountain Chip' website (link from the top bar of this site).
Dave

Just the one now, but this one's mine! - and it will be finished eventually..... - but also temporary custodian of a project until it is finished enough for Angie to drive it


...oh, and a 2006 Freelander destined for the jungles of The Gambia - 4500 miles across roads, desert and tracks - what could possibly go wrong?
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