Donations towards server fund so far this month.

 
£0.00 / £100.00 per month
Page:
Home > Help Needed / General Tech Chat > Car running fine dump valve not working

Farrierman

7 Posts
Member #: 11739
Junior Member

Hi just been driving about in mini with metro turbo and noticed dump valve not working. Have changed for new one, but still nothing. Have connected boost gauge which reads nothing. Car definitely comes on boost and goes well and lots of noise from wastgate when changing gear? Any ideas thanks


Steve220

51 Posts
Member #: 11017
Advanced Member

Shropshire

Where's the sensor line plugged into?


D4VE

User Avatar

2809 Posts
Member #: 10749
Post Whore

lowestoft suffolk

Was it working before?

On 24th Oct, 2015 jonny f said:
Nothing gets past Dave lol

NOTHING GETS PAST ME!! *tongue*

1/4 mile 14.7 @ 96mph 12psi boost
Showdown class A 2nd place 18.6 @ 69mph


Farrierman

7 Posts
Member #: 11739
Junior Member

Was working before, it is on the side of the plenum chamber on the left, and the boost gauge is connected on the other side drilled into the plenum as well? Drove to the pub yesterday with three blokes and pulls well but the dump valve?


Turbo Phil

User Avatar

4287 Posts
Member #: 20
My sister is so fit I won't show anyone her picture

Lake District

For an accurate reading the boost gauge should be connected into the inlet manifold. The small end of the dump valve also needs taking to the inlet manifold to.

Phil.

WWW.TURBO-MINI.COM


Farrierman

7 Posts
Member #: 11739
Junior Member

Cool, do you have a diagram please? Thanks again


Yo-Han

User Avatar

876 Posts
Member #: 3228
Post Whore

North of the Netherlands

Using search:
www.turbominis.co.uk/forums/index.php?p=vt&tid=2

Dazed and Confused....


TurboDave16V
Forum Mod

10881 Posts
Member #: 17
***16***

SouthPark, Colorado

This is very very simple.

The large (25mm) side of the DV is connected to the plenum just BEFORE the carb.

The small (6mm ish) hose on the DV goes to the inlet manifold. There is absolutely NO connection on the carb or plenum that will allow the DV to work.

The boost gauge needs to be connected to the inlet manifold. There is absolutely NO connection on the carb or plenum that will allow the boost gauge to work properly.

Ideally, the boost gauge and plenum need separate feeds from the inlet manifold, using separate hose tails that are drilled /
tapped into the inlet.

On 17th Nov, 2014 Tom Fenton said:
Sorry to say My Herpes are no better


Who remembers this first time around: https://www.youtube.com/watch?v=JF0a5aoEGsw


Farrierman

7 Posts
Member #: 11739
Junior Member

Do you a picture of where I should connect boost gauge thanks


TurboDave16V
Forum Mod

10881 Posts
Member #: 17
***16***

SouthPark, Colorado

No.
The inlet manifold is the part between the carb and cyl head. You can drill and tap a hose tail anywhere along the top face of it.

On 17th Nov, 2014 Tom Fenton said:
Sorry to say My Herpes are no better


Who remembers this first time around: https://www.youtube.com/watch?v=JF0a5aoEGsw


Turbo Phil

User Avatar

4287 Posts
Member #: 20
My sister is so fit I won't show anyone her picture

Lake District

On 15th Apr, 2018 Farrierman said:
Do you a picture of where I should connect boost gauge thanks


The inlet manifold. Drill and tap for 1/8 BSP, screw in a suitable hose tail and connect the pipe from the boost gauge to this. Simples !!

Phil.

WWW.TURBO-MINI.COM


TurboDave16V
Forum Mod

10881 Posts
Member #: 17
***16***

SouthPark, Colorado

Just to make sure we’re on the same page, you obviously need to remove the inlet manifold before drilling and tapping it...

On 17th Nov, 2014 Tom Fenton said:
Sorry to say My Herpes are no better


Who remembers this first time around: https://www.youtube.com/watch?v=JF0a5aoEGsw


theoneeyedlizard

User Avatar

7091 Posts
Member #: 1268
The Boom Boom speaker Police!

Essex

Or take out the banjo bolt for the servo pipe and drill that.

In the 13's at last!.. Just


Graham T

User Avatar

348 Posts
Member #: 1106
Senior Member

Hungerford, Berks

Here you go:


Farrierman

7 Posts
Member #: 11739
Junior Member

Thanks great help


Rob H

4298 Posts
Member #: 700
Formerly British Open Classic

The West Country

As already mentioned the signal line for the dump valve needs to be plumbed into the inlet manifold not the plenum. They work on the principle that what the throttle is closed one side of the dump valve is subjected to less air pressure that the other allowing the piston to move. With both sides connected to the plenum they will always be at the same pressure and nothing will happen.

Also have you blanked off the pressure relief valve on the plenum chamber?

Isambard Kingdom Brunel said:
Nothing is impossible if you are an Engineer


TurboDave16V
Forum Mod

10881 Posts
Member #: 17
***16***

SouthPark, Colorado

And if the DV is slow in operation, usually delayed, or giving a long dumping sound, you’ll need to replace the butterfly in the carb with a solid one that doesn’t have the poppet valve installed (or remove the valve and solder up the holes)...

On 17th Nov, 2014 Tom Fenton said:
Sorry to say My Herpes are no better


Who remembers this first time around: https://www.youtube.com/watch?v=JF0a5aoEGsw

Home > Help Needed / General Tech Chat > Car running fine dump valve not working
Users viewing this thread: none. (+ 1 Guests)  
To post messages you must be logged in!
Username: Password:
Page: