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Home > Help Needed / General Tech Chat > Boost

Yoda74

27 Posts
Member #: 11728
Member

Uden, Holland

Hi guys.
My MG Metro Turbo engined mini uses the standard Metro ECU.
It should give 4psi boost at low revs and from 4500 rpm give 7psi.
Sometimes when I rev it I feel extra power coming in at about 4800 rpm, but most of the time I feel nothing extra at higher revs.
Should the extra boost come in fairly unnoticeable or should I always feel it?
What do you think?
What could be the problem?

Cheers
Harold


theoneeyedlizard

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7192 Posts
Member #: 1268
The Boom Boom speaker Police!

Essex

Do you have a boost gauge to see whatís happening?

In the 13's at last!.. Just


Yoda74

27 Posts
Member #: 11728
Member

Uden, Holland

The standard Metro Turbo Clocks with Boost-gauge-leds.


Mr Joshua

2327 Posts
Member #: 1954
Post Whore

Luton Bedfordshire

The ecu controls the the compressor pressure fed into the waste gate actuator by opening and closing the waste gate solenoid valve usually mounted on the bulkhead. I have found that ecu's can vary a little in operation but you won't feel a hammer punch. Best way to get a little more is to fit a waste gate bleed valve, and adjust so that at full chat the ecu regulates up to 10psi of boost

Own the day


metroturbo

781 Posts
Member #: 989
Post Whore

North Yorkshire

Are you sure it is all plumbed in correctly following your previous issues with the boost gauge not working?


Yoda74

27 Posts
Member #: 11728
Member

Uden, Holland

Yes Iím pretty sure. The boost gauge works again, well most of the time really, sometimes I have to tic on the gauge to bring it to life, a bad connection I think. Will have a look at that next winter.

What does the wastegate solenoid look like and where can I find it?


Yoda74

27 Posts
Member #: 11728
Member

Uden, Holland

I think I found the wastegate solenoid, screwed to the bulkhead. Is there a way to test if it works like it should?
Or is a turbo pressure gauge the way to go? Whatís a good one and how do I plumb it in?


metroturbo

781 Posts
Member #: 989
Post Whore

North Yorkshire

The solenoid can be tested by putting 12 volts to it, which will open it. If you wanted to see if it was working as it's supposed to you would need to go for a drive with an oscilloscope fitted. A pressure gauge would be a simpler place to start.


Yoda74

27 Posts
Member #: 11728
Member

Uden, Holland

Thanks, I will put 12v on it this weekend and see what happens. Can it be overhauled if it doesnít work right? How?

What boost gauges are good for a fair price and how do I plumb it in?

Edited by Yoda74 on 11th Sep, 2020.

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