HOW TO fit dump valve

[vxrdave]

1 Here is the dump valve fitted into the boost pipe using the fitting kit that comes supplied, you could alternatively use a courtney silicone pipe with dump valve 'tee' off, or a Regal power pipe etc, as you would then not have to cut the original boost pipe and use the fitting kit.
http://i107.photobucket.com/albums/m283/vxrdave/1.jpg
http://i107.photobucket.com/albums/m283/vxrdave/PICT00222.jpg
2 Once you have fitted the dump valve and fitting kit into the boost pipe and re - fitted it, you need to run the vacum hose, i ran mine behind the intake plenum and in the clips already there, i also used black vacum hose so it didnt stand out.
http://i107.photobucket.com/albums/m283/vxrdave/3-1.jpg
3 The Fuel pressure regulator is underneath this hose that im pointing at, remove this pipe and you can carry out the next few steps easy.
http://i107.photobucket.com/albums/m283/vxrdave/4.jpg
4 This is the fuel pressure regulator
http://i107.photobucket.com/albums/m283/vxrdave/5.jpg
5 You will now need a T peace so you can 'T' into the vacum line for the fuel pressure regulator and run the vacum to the dump valve. If you dont get one in the kit, you can get these from your local motor shop
http://i107.photobucket.com/albums/m283/vxrdave/6.jpg
6 Fit it to the end of the Dump valve vacum pipe like so
Remove the right angled pipe from the fuel pressure regulator and pull the right angled bit off the hard plastic vacum pipe, you will now want a little piece of vacum hose to fit on the 'T' piece so it comes from from the hard plastic pipe to the 'T' piece, then the right angled rubber pipe goes on the other side of the 'T' piece and back onto the pressure - it should look like this. It may sound confusing, but once you see it, it is pretty much self - explanatry.
http://i107.photobucket.com/albums/m283/vxrdave/8.jpg
7 After that, refit your induction hose, make sure all pipes are on and clips are done up tight etc. Start it up and give it a rev, you should get a TISSHHHHH.

thanks to dazturbo6502

[AndyVXRwigan]

Dave I have the other dump valve to yours! how loud is your dv??

[vxrdave]

its about wright i would say not too over the top, is better after stage2

[Dazturbo6502]

Hope this comes in Useful People :wink:

[vxrdave]

This is worth a look as well. FROM COURTENAYS WEB SITE

Dump Valve Fitting Recommendations
This is a guide for fitting a dump valve and eliminating dump valve related drivability issues on Astra G and H, Zafira A and B and VX220 fitted with the Z20LET - LEL – LER - LEH engines.

The dump valve for these engines must be a twin piston unit as the car has air mass metering. The twin piston unit stops the valve breathing un-metered air on vacuum, confusing the engine ECU.

How a Dump Valve Works
Traditionally a dump is fitted in the boost pipe close the inlet manifold; it has a vacuum - boost trigger pipe taken from the inlet manifold between the throttle body and the engine. When driving the car hard on boost there is boost pressure pushing on the dump valve, however there is equal boost pressure pushing on the dump valve diaphragm on the other side. This holds the dump valve shut in equilibrium. When you lift off the throttle the throttle body closes this creates a vacuum in the manifold thus in the boost – trigger pipe, this vacuum pulls on the dump valve diaphragm and with the boost pressure in the inlet pipe pushes the valve open releasing the air into the engine bay with a whoosh.

How is this Vauxhall Engine Different ?
These engines work as above, with one major difference. The boost - vacuum trigger pipe is run through a vacuum storage capsule, and a solenoid that is triggered by the engine ECU. There are switches on the pedals so the ECU knows when you de-clutch and trips the solenoid to create the vacuum quicker to the original equipment recirculation dump valve built into the side of the turbo.

This vacuum solenoid arrangement is also used on part throttle to regulate the air mass to the engine, i.e. when the turbo is trying to make boost due to its small size but the load demands and throttle angle do not require boost, it opens and shuts the factory re-circ valve to regulate boost improving drivability, kind of like a secondary throttle.

This is the source of the trouble. If you use this trigger source (i.e. from the original vacuum storage) for the aftermarket dump valve it will pulse the new valve on part throttle, the previously metered air is then released into the engine bay and will cause driveability issues on the fuelling. In some circumstances the car will also go lean, in this situation the TC (traction control) light can come on.

The Fix
The cure is to give the aftermarket dump valve its signal from a true non interrupted vacuum source; we recommend the fuel pressure regulator (see picture below). For further improved driveability, it is possible to leave the original equipment valve still working so the engine management can regulate, control and pulse this valve. However the aftermarket valve will operate slightly quieter.

[Cobers VXR]

Can i just thank you vxr dave,

I used this guide to fit my dump valve.

THANK YOU

[Cobers VXR]

Can i just thank you vxr dave,

I used this guide to fit my dump valve.

THANK YOU

[andy16vturbo]

you can say that again :lol:

[James]

:lol:

[Dazturbo6502]

Can i just thank you VXR dave,

I used this guide to fit my dump valve.

THANK YOU

Thank ME matey.....I made up the 'How to' from my car :lol:

[Cobers VXR]

Can i just thank you VXR dave,

I used this guide to fit my dump valve.

THANK YOU

Thank ME matey.....I made up the 'How to' from my car :lol:

Thank you

[robovxr]

what dumpys can ya have on these because i asked for one at courtney and mines a lot different from the one that is in the pics at top were do i get one from ?

[vxrdave]

LMF

[VXR56]

Ive just fitted my bailey d/v to my astra using this guide so thanks alot to those involved with the how to and the write up :grin:

[Dazturbo6502]

'How - To' was courtesy of me ;)

Glad it helped :cool:

[FrazVXR]

i notice people are sayin that they are fitting bailey valves to there astra, tho which model are they using?? i had a dv 26d then changed to a 26. also tried a 36 on it till it brought on an engine management light.

[Dazturbo6502]

DV26 or DV36

[FrazVXR]

see when you fit an aftermarket dump valve is it normal to have a pipe lying lose near the 't piece'??? its just i bought the car with the dv on it and there is a black pipe lose near to where the t piece is with a bolt in the end of it??? the car seems to run fine tho it churps pretty loud when letting off boost which i am not sure if it is normal or not.

[Dazturbo6502]

Can you get a pic up of it?

[vxr_kid]

thanks dude i needed this help :)

[streamline]

I used this for fitting my dump valve, I had the laptop on the engine and used wireless internet to get this link up:D

Must say everything was easy to do thanks to Dazturbo6502 :D:D:D

[Dazturbo6502]

No worries ;)

[J3ffers]

i'm a little confused, just got my dv hose from courtenay and my dv26.. and looking for a vacuum point, i know it's at the fuel regulator but the not sure what bitto cut for the t piece.. oh and it's fitting on a corsa sri 1.6t any help would be great!!

thanks...

[cannibalc]

i have always been told at work that fitting a dump valve knackers the turbo's as they have a pressure based oil seal, so when you dump out all the pressure, no oil seal. which eventually buggers up the turbo.

[WiggzVxrNurburgring]

great thread my mat got a dump valve when the astra vxr 1st came out and it caused him nothing but problems so he had to take it off!

whats the best DV you guys recommend?? nothing to bonkers (as in loud) just nice :)

[vxrdave]

The baileys Dv 36 and it wont be loud at all.

[dtox]

I fitted a DV baileys 26 and lost soooo much power just unbeliveable looking on a spring to block the OEM unit to sort it out

[drunkenmunkey85]

I have heard that you should block a hose from the original pressure release for the turbo but not entirely sure which one and if this should really be done. I havent lost any power from fitting my dv26d and no running issue but it is a very quite release sound.

[vxrdave]

If its fitted correct then no loss of power so you must have something not right :-| has for blocking off the pipe then a one way valve in the vac pipe to the std valve will make it louder, but can not always but can cause problems.

[drunkenmunkey85]

If its fitted correct then no loss of power so you must have something not right :-| has for blocking off the pipe then a one way valve in the vac pipe to the std valve will make it louder, but can not always but can cause problems.

What sort of problems would you face and is it nice and easy to put back if problems do arise, i am interested in trying to make it a little louder as can barely hear it at the moment.

[vxrdave]

The car is just not smooth on part throttle ie crusing and yes its easy to put back.

[drunkenmunkey85]

What sort of problems would you face and is it nice and easy to put back if problems do arise, i am interested in trying to make it a little louder as can barely hear it at the moment.

I have now done this after debation and i have found no running problems at all, the valve is alot louder and more responsive. As it goes for refitting the original it is very very easy. If you require i will take a picture and post it of which pipe you need to block off so please let me know. As for blocking it off i spoke to bailey and they suggested just sticking a bolt etc into the end of the pipe and cable tidying it on and then attaching it out of the way. All makes sense with a picture so again let me know.

[Paulburks]

on reading this post there is no mention of removing the spring from the Diverter Valves on the turbo and replacing it with an insert?? i have been told to remove the 3 bolts take the spring out and replace with insert ??

is this right?

[corsasrisilver]

just get a evoms diverter valve much better and increase turbo spoil up and reduce lagg

[Paulburks]

can you have both??

Diverter Valves from regal
and
dump valve?

[vxrdave]

can you have both??

Diverter Valves from regal
and
dump valve?

yes you can but all wast of time and money save it for remap.

[Wire Tim]

I have now done this after debation and i have found no running problems at all, the valve is alot louder and more responsive. As it goes for refitting the original it is very very easy. If you require i will take a picture and post it of which pipe you need to block off so please let me know. As for blocking it off i spoke to bailey and they suggested just sticking a bolt etc into the end of the pipe and cable tidying it on and then attaching it out of the way. All makes sense with a picture so again let me know.

Anyone know which pipe he's talking about? I've pm'd him, but no reply....:confused:

[Wire Tim]

Anyone know which pipe he's talking about? I've pm'd him, but no reply....:confused:

Bumpety bump bump.............

[W4GCN]

not sure mate but mine is T'd into a different pipe than what is shown on this thread so either mine is wrong (was fitted before i got it) or could be right.

I would assume this thread to be correct as it was done by some very well respected and knowlegable vx heads.

Ive PM'd also for advice on where mine has been T'd

[vxrdave]

Anyone know which pipe he's talking about? I've pm'd him, but no reply....:confused:

Bumpety bump bump.............


It would be the thick black pipe about 5mm in dia that rund from the turbo around the airfilter and in to the bulk head.

not sure mate but mine is T'd into a different pipe than what is shown on this thread so either mine is wrong (was fitted before i got it) or could be right.

I would assume this thread to be correct as it was done by some very well respected and knowlegable vx heads.

Ive PM'd also for advice on where mine has been T'd

you have pm.

[W4GCN]

i have always been told at work that fitting a dump valve knackers the turbo's as they have a pressure based oil seal, so when you dump out all the pressure, no oil seal. which eventually buggers up the turbo.

Thats what tommy a tech from vx in inverness told me aswell, the dump valve fooks the turbo's! Ive got one on my car and thankfully had no problems with it ever.