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-   -   which dump valve noise (http://nissansilvia.co.uk//showthread.php?t=1260)

ollymk1escort 22-10-2006 10:03

which dump valve noise
 
Which dump valve am i looking for that makes like a chirping noise. its not external wastegate by the way.
cheers
p.s would i need a t piece and what size?

adzs12 22-10-2006 10:57

You wont get a chirping noise via a dump valve, the chirping noise comes when the air is forced back through the turbo and sounds through the air filter. However this is mildly quiet compared to when an external wastegate is used.

30psi 22-10-2006 11:59

You technically only need a dump valve at very high boost.

I think the chatter noise sounds best

ollymk1escort 22-10-2006 12:09

yeah but i like dump valve noise as well so am gonna go for one. Hows best to fit it??
can i put a t peice between the intake and turbo just cut it and join with samco hose what size do i need??

umpkin 22-10-2006 20:43

i think my dump valve pipe is 1" internal dia, so all you need is a bit of tube 1" or 25mm external dia bout 60mm long and get it welded in the pipe between the turbo and the throttle body, and then get a bit of samco or similar 1" internal bout 100mm long to connect the valve to, then the vacum pipe on mine is 'T'ed off the vac pipe that goes to the fuel pressure reg.

hope this helps.

PukkaSilvia 22-10-2006 22:48

yep weld a outlet on your pipework preferably around 2 inches or so away from where it bolts to the inlet manifolds throttle body. Then the reference pipe that needs to go on top of the dump valve can connect up to a disused blanked outlet that you can find attached to the bulkhead above the hydraulic clutch fluid pot

ollymk1escort 23-10-2006 20:57

but the inlet pipe is alloy is it not and i dont know anyone who can weld alloy. Could i solder it? would it be strong enough? The t piece i was talking about as like this also would the dump valve be ok?
http://cgi.ebay.co.uk/BAILEY-PISTON-...QQcmdZViewItem

umpkin 23-10-2006 21:38

not the inlet manifold, (yes that is alloy) you weld it in the crossover pipe, that connects onto the turbo, over the engine, then fits onto the throttle body and the idle managment, if someone already has one fitted to the crossover pipe, can they post it up for these guys please, i have my DV on my cozzie IC.

ollymk1escort 23-10-2006 22:02

Oh well if the crossover is steel i can weld that.

umpkin 23-10-2006 22:56

when i bought my car, the pipe outlet for the DV was welded at where the red arrow points, at the back side to the idle supply pipe.

http://www.umpkin.pwp.blueyonder.co....ssoverpipe.jpg


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