Recirculating valve

**zoomungus** · Tuesday 3rd February 2009, 07:06

whats it do? can you blank it off, why would you blank it off?

thanks

**p fandango** · Tuesday 3rd February 2009, 09:01

Originally Posted by zoomungus

whats it do? can you blank it off, why would you blank it off?

its basically a dump valve but ditches the air back into the system instead of the atmosphere. I'm not running a recirc or dump valve on my 19t & not noticed any loss in spool up between gear changes

**wegal** · Tuesday 3rd February 2009, 11:25

I thought the point of a recirc or a dump valve was to stop the turbine getting damaged due to back pressure when the throttle is backed off... when the fuel and air is no being put into the cylinders but you still have a lot of pressure in the system the recirc valve"depressurise's" they system so that you dont stall the turbo.

Of course I could be talking utter ££££££££££.

**p fandango** · Tuesday 3rd February 2009, 12:39

Originally Posted by wegal

I thought the point of a recirc or a dump valve was to stop the turbine getting damaged due to back pressure when the throttle is backed off... when the fuel and air is no being put into the cylinders but you still have a lot of pressure in the system the recirc valve"depressurise's" they system so that you dont stall the turbo.

Of course I could be talking utter ££££££££££.

your basically right, you've got to be running quite high boost levels to damage the turbines & as i say i've not noticed any lag between gear changes

**zoomungus** · Tuesday 3rd February 2009, 12:51

so if i have a dump valve i no longer need the recirc?

**p fandango** · Tuesday 3rd February 2009, 12:56

Originally Posted by zoomungus

so if i have a dump valve i no longer need the recirc?

spot on mate

**zoomungus** · Tuesday 3rd February 2009, 15:31

so i blank it off then do what with the pipe?

**Alan M** · Tuesday 3rd February 2009, 15:52

Fit it to the dump valve.

**zoomungus** · Tuesday 3rd February 2009, 16:50

just looked at the pipe, the dv pipe is teed into the recirc, can i not just disconnect the the recirc and put it direct to the dump valve, then block the end of the recirc inlet?

**Alan M** · Tuesday 3rd February 2009, 18:28

Yes. Just pipe the DV to the nipple on the inlet manifold where the recirc goes.

**Turbodave** · Tuesday 3rd February 2009, 18:58

Taking this topic and running with it... what's the best/easiest way of blanking off the recirculation valve, suspect mine might be iffy so blanking it off would eliminate that area. The turbo doesn't strike me as being very accessable on these, so safe to say it's a bit of a bitch of a job?

**PNuT** · Tuesday 3rd February 2009, 19:02

Originally Posted by zoomungus

just looked at the pipe, the dv pipe is teed into the recirc, can i not just disconnect the the recirc and put it direct to the dump valve, then block the end of the recirc inlet?

not really, boost pressure helps to hold the recuirc valve shut, disconnecting it will end up in lost boost......

seal the bloody thing up good & proper

**PNuT** · Tuesday 3rd February 2009, 19:04

Originally Posted by Turbodave

Taking this topic and running with it... what's the best/easiest way of blanking off the recirculation valve, suspect mine might be iffy so blanking it off would eliminate that area. The turbo doesn't strike me as being very accessable on these, so safe to say it's a bit of a bitch of a job?

the blanking plates give you a lot more room to work than the origional valve

however, its not that big a job to pull the compressor side of the turbo out of the car

**zoomungus** · Tuesday 3rd February 2009, 19:07

Originally Posted by PNuT

not really, boost pressure helps to hold the recuirc valve shut, disconnecting it will end up in lost boost......

seal the bloody thing up good & proper

just ordering a forge blanking plate!

**Turbodave** · Tuesday 3rd February 2009, 19:33

Originally Posted by PNuT

the blanking plates give you a lot more room to work than the origional valve

however, its not that big a job to pull the compressor side of the turbo out of the car

Was that sarcasm?!

Don't supose there's a how to guide, or anybody fancy doing one... had a wee search of the forum and google but nothing that helpfull. And can I fabricate a blanking plate, or is it worth following your man there and ordering a Forge one?

Cheers

**zoomungus** · Tuesday 3rd February 2009, 19:38

if i had the time i would make one, its nothing special, just a plate

**cameron** · Tuesday 3rd February 2009, 19:59

Just be careful with the 3 x 10mm bolts, drop them and your stuffed

Very fiddly to get them back in as well, a ratchet spanner is your best friend

Good luck matey

Lee

**PNuT** · Tuesday 3rd February 2009, 20:03

Originally Posted by Turbodave

Was that sarcasm?!

Don't supose there's a how to guide, or anybody fancy doing one... had a wee search of the forum and google but nothing that helpfull. And can I fabricate a blanking plate, or is it worth following your man there and ordering a Forge one?

Cheers

no, i was being serious.... but it depends on your mechanical knowledge i guess!

**zoomungus** · Tuesday 3rd February 2009, 20:15

Originally Posted by PNuT

no, i was being serious.... but it depends on your mechanical knowledge i guess!

tight as a nuns chuff round that turbo!

**cameron** · Tuesday 3rd February 2009, 21:01

Recirc on the Turbo

Recirc off the Turbo

Blanking plate in Place

Just move the air filter hose out the way and get in there with a Ratchet Spanner ( 10mm iirc )

The bottom nut is easier to get from underneath the car

Lee

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