Page:
Home > Help Needed / General Tech Chat > Dump valve question

matt101

69 Posts
Member #: 1457
Advanced Member

Bristol

25th Mar, 2008 at 05:12:48pm

Hi all. Fitted a dump valve on the weekend but am not sure if its working (am not getting any sound) it was brought second hand, is there anyway of testing these? Im only currently running 4psi boost, not sure if this makes any difference or will effect it, any help would be greatly appreciated. Cheers

matty

User Avatar

8297 Posts
Member #: 408
Turbo Love Palace Fool

Aylesbury

25th Mar, 2008 at 06:49:11pm

Where have you plumbed the vacuum pipe into?

And is it a piston or diaphragm type valve?

Edited by matty on 25th Mar, 2008.

https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel

www.fusionfabs.co.uk



1/4mile in 13.2sec @ 111 terminal on 15psi

theoneeyedlizard

User Avatar

7265 Posts
Member #: 1268
The Boom Boom speaker Police!

Essex

25th Mar, 2008 at 09:36:39pm

as Matty says. Check the vacuum pipe. It needs to come from the inlet manifold after the butterfly.

In the 13's at last!.. Just

Jay#2

User Avatar

2500 Posts
Member #: 648
Post Whore

Northern Ireland (ex AUS)

25th Mar, 2008 at 09:49:52pm

If it's a piston type check that the seal is OK. If it swells it might stick.

On 7th Nov, 2008 Nic said:
naeJ
m
!!!!!!sdrawkcab si gnihtyreve ?droabyekym ot deneppah sah tahw ayhwdd


matt101

69 Posts
Member #: 1457
Advanced Member

Bristol

31st Mar, 2008 at 07:05:49pm

I have checked the vacuum pipe, it is plumbed in the inlet manifold and after the butterfly (on a "y" piece joined with boost gauge). Been for another drive since and can hear a very faint noise coming from it so i guess its working ok. Anybody recommend a decent sounding dump valve?

Rob H

4314 Posts
Member #: 700
Formerly British Open Classic

The West Country

31st Mar, 2008 at 07:35:08pm

The easiest way to test them is by sucking on the vacuum pipe.

There is the possibility that the spring in the dump valve is too strong for 4 psi of boost, but that's a long shot.

I can't comment on a "decent sounding" dump valve as that's not really my bag, but I like Forge items for two reasons, they are tunable (I like thinks that I can fiddle with) and my mate works for Forge.

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

turbo hogster

1641 Posts
Member #: 178
Post Whore

stowmaket suffolk

31st Mar, 2008 at 07:56:30pm

not enough boost i would say, 4pi isnt alot in dumb valve terms.

always looking for them bigger bunches of bannanas

wil_h

User Avatar

9258 Posts
Member #: 123
Post Whore

Betwix Harrogate and York

31st Mar, 2008 at 08:06:16pm

I think you should still hear something.

Start the engine and look at the dumpvalve, at tickover it should be open. Pull the pipe off it and it should close.

If not, take it off, take it to pieces and give it a good clean.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph



On 2nd Jan, 2013 fastcarl said:
the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.

Home > Help Needed / General Tech Chat > Dump valve question
Users viewing this thread: none. (+ 1 Guests)  
To post messages you must be logged in!
Username: Password:
Page: